A 1951 Beginner/Novice Station
|
|
- Shannon Blair
- 6 years ago
- Views:
Transcription
1 A 1951 Beginner/Novice Station Introduction In 1951 "The Roy Rogers Show," "I Love Lucy" and "Mr. Wizard" were all new to television. In 1951 General Douglas MacArthur, relieved of his duties by President Truman, bid farewell to Congress. In year-old Willie Mays joined the Giants. Also, in 1951, the Novice license was introduced. This new license was nonrenewable and good for only one year. Novices had limited frequency privileges and only CW privileges on HF. Transmitters had to be crystal control and 75 watts maximum input power. But, by giving the beginner an onthe-air chance to build code speed to 13 WPM, the new Novice license was an effective stepping stone to the General Class license. The July 1951 QST editorial welcomes the new novices and pledges an increasing amount of material more directly useful to the beginner. Articles covering simple transmitters, receivers and basic workshop practices are promised. According to this QST editorial Nothing can compare with the thrill of the first QSO with equipment you have constructed or assembled with your own hands and your primary object in ham radio is communication. At the same time 1951 novice or beginner station projects assumed a tight budget, simple design and required a minimum of tools and special parts to assemble. Ideally most parts could be scavenged from old TVs or table radios. How well did equipment like this perform? Could new novices using this type of equipment really expect much communication? In order to get an idea of the effectiveness of a 1951 novice station I build one and put it on the air. For a transmitter I chose the 6AG7 Novice One Tuber transmitter (May, June 1951 QST). This design was updated in Nov 1953 QST to cover 80 and 40 and stayed in the ARRL handbooks through The receiver I elected to build is based on the "First Receiver for the Novice" (Aug 1951 QST). Station Description The "First Receiver for the Novice" is a two tube regen. A 6SJ7 regenerative detector is followed by a 6SN7 dual triode providing two stages of audio amplification. It uses home wound coils to cover both 80 and 40 meters. Controls include bandset, electrical/mechanical bandspread, regeneration and volume. With careful tuning SSB and CW signals can be copied but selectivity is lacking and stability is marginal. Like most simple receivers of it s day this one does not support a loud speaker. It is a headphones only set. This is definitely a beginner s receiver. The "Novice One Tuber" is a one tube crystal controlled oscillator with pi-network output. Plug-in coils or a bandswitch are eliminated by using homemade "basket weave" coils and supporting them on three pop sickle sticks. Instead of an expensive tuning meter it uses two small pilot lights. It runs about 10 watts input and puts out 3 to 4 watts on either 80 or 40.
2 The power supply is fairly straight forward supplying filament voltage, 350 volts for the transmitter and 150 volts for the receiver. All of the parts of this station are mounted on wooden chassis. The slats are spaced properly to allow mounting the tube sockets, transformers and filter capacitor. This works fine as long as shielding is not required. It saved the beginner from buying and using the tools required to bend, cut and hole punch a metal chassis. The wooden slats could even be nailed rather than screwed together to further simplify construction. In keeping with the times I chose to paint the rig in battleship gray like much of the commercial equipment in Operating All three pieces of my 1951 Novice Station work together pretty well. They each represent about the same level of complexity and sophistication. The one unexpected problem I found was that the receiver is sensitive to the magnetic field generated by the power supply transformer. To avoid hum I have to place the power supply as far away from the receiver as possible. With some frequency and schedule planning I've been able to have several QSOs using this station. All reported a nice sounding signal including a 599 from near Detroit, MI. The 80 and 40 QRP frequencies 3560 and 7040 usually worked best for starting a QSO along with the 80 and 40 meter "novice" bands ( and ). Using this station did present enough challenge that each QSO felt like a major accomplishment. I imagine the 1951 novice moving beyond the two tube regen receiver fairly quickly. The 10 watt power level of the single 6AG7 is fine for an experienced operator but, again, the new novice would have looked forward to running the 75 watt "novice gallon". Design and Construction details Receiver - Construction A metal front panel is required in order to eliminate frequency shift caused by hand capacity. My front panel is a piece of PC board, the phenolic side hidden by paint. The receiver controls left to right are bandset, bandspread (with smaller pinch drive knob), volume and regeneration. Position the sockets left to right (from the front) coil socket, 6SJ7 socket, 6SN7 socket, so that there is enough room for the bandset and bandspread capacitors. Also important is to allow for CH1, the audio choke in the plate circuit of the 6SJ7. If you are mounting T1, the audio isolation transformer, in the receiver allow for that also. Orient the 6SJ7 socket so that the key points... and the 6SN7 socket so that the key points... I used four
3 solder strips, two by each of the tube sockets. The parts list calls for straight line frequency tuning capacitors. If straight line capacity capacitors (those with symetrical half circular rotor plates) are used, the high frequency end of the frequency scale will be squeezed. C9, the bandspread series capacitor, sets the bandspread range. It is mounted in the plug-in coil so that the range can be fine tuned for each band. Wire the regeneration control, R2, so that the arm... Wire the volume control, R7, so that the arm is... Many radios of this era connected the headphones directly into the plate circuit of the last audio tube. 100 to 250 volts ran through the headphones clamped to your head. This is a potentially lethal safety problem. T1, the audio isolation transformer, removes this hazard. I have my audio isolation transformer built in a seperate box so that I can move it from radio to radio. While it does not show up in the photos, it is not optional. - Operation Operation requires high impedance headphones, antenna, 150V B+, 6.3 V filament voltage and patience. Start with the bandset and bandspread capacitors set to approximately half capacity, maximum/full clock-wise volume and minimum/full counter-clockwise regeneration. With band coil of choice plugged in and antenna connected, advance the regeneration control until you just start to hear a hiss. This should be a good setting for listening to CW or SSB signals. Adjust the bandset control until you hear stations and then fine tune using the bandspread control. - Calibration Instructions Once you've gotten a feel for tuning a regenerative receiver, you can set the bandspread range and make up a calibration chart. This requires a second, well calibrated receiver. Usually the station transceiver works well for this. When set for CW or SSB, a regenerative detector oscillates, radiating RF on the frequency it is tuned to. The second receiver can be used to tell the frequency the regen detector is tuned to. Decide on a lowest frequency for a bandspread range, set the bandspread capacitor for maximum capacitance and set the second receiver to that frequency. Advance the regeneration control until the hiss is just heard indicating that the regen detector is oscillating. Now tune the bandset capacitor while listening for the regen detector on the second receiver. Once you've found it, note the bandset capacitor setting. Now adjust the second receiver to a new calibration point (for example, 25KHz higher in frequency) and then listen for the regen detector while tuning the bandspread capacitor. Walk up the band noting frequency vs bandspread capacitor settings for each calibration point. If you find that the bandspread capacitor covers to much of the band or that tuning is to fast, decrease the value of C9. Transmitter
4 - Construction For safety I built my 1951 novice transmitter with a wooden front panel. On the front of the transmitter are the plate tuning (C8) control on the left and antenna loading (C9) control on the right. The key connects to the fanstock clips on the front left while the antenna connects to the fanstock clips on the far right. Coils are wound basket weave style. Build a winding form of seven nails evenly spaced around a 2" diameter circle. Winding in and out around the odd number of nails gives the basket weave. Before removing the coil from the winding form, tie it off using string or twine. Two studs at the right rear provide connection points for the pi-network coil. Position the sockets and coil left to right (from the front) crystal socket, 6AG7 socket, pi-network coil. Insure that there is enough room underneath for the two pinetwork tuning capacitors. Orient the 6AG7 socket so that the key points... I used two terminal solder strips to support the RF chokes and another solder strip for terminating the power cable. - Operation To minimize harmonic output, this transmitter is designed to only operate on the crystal fundamental frequency. 7 MHz crystals are used on 40 meters and 3.5 MHz crystals are used on 80 meters. The pi-network will load into a variety of antenna lengths. Once an antenna is connected, use the standard pinetwork dip-and-load adjustment procedure. Monitor current using either I1 or the lamp/current meter on the power supply. Fine tuning can be done by using the I2 output indicator on top of the pi-network coil. Additional loading capacity, if needed, may be connected across the studs just to the right of the pi-network coil. Power Supply - Construction The power supply supplies filament voltage, 350 volts for the transmitter and regulated 150 volts for the receiver. I1, between the rectifier and the filter, serves both as a current "meter" and as a fuse. If the filter
5 capacitor fails, shorting to ground, I1 will burn out before any damage is done to the transformer. Choke input improves high voltage regulation but limits the output voltage. If more voltage is required for a transmitter, the filter should be converted to capacitor input. If this is done, the VR tube dropping resistor, R1, needs to be increased in value so that the VR tube is never required to draw more than 40mA. Operating Comments/Notes Keep in mind that I purposely kept this station at the novice/beginner level. Two options to improve the performance of receiver require an additional tube. One would be to add an RF stage with gain control, the other is to add a mixer/converter stage. Similarly I could have added an amplifier stage beyond the one tube oscillator/transmitter. I chose to forgo these complexity increasing options so that I could see how well the beginner solution worked. Receiver selectivity and tendency to overload were the biggest drawbacks to the simple regen receiver design. Unfortunately, tweaking the regeneration for greatest sensitivity also made the receiver most prone to overload. Nearby strong signals or slight drift caused the 6SJ7 detector to go in and out of regeneration. In 1951 the novice operator probably sacrificed a little sensitivity in favor of a stable signal. I imagine a novice struggling to copy the code would not want to be simultaneously fiddling with the receiver controls. In my original station configuration I had an antenna tuner between the TR switch and the antenna. Both the receiver and the transmitter "saw" the antenna tuner as part of the antenna system. I found the regeneration point and frequency varied a lot as I adjusted the antenna tuner for best transmitter loading. I removed the antenna tuner from the station configuration and depended on the transmitter pi-network to load into my 105'inverted L. This step actually made the station more like my 1951 goal and made it easier to use. I had no way to accurately zero beat my transmitter frequency. I finally used my station receiver/code monitor (a 75A3) to listen for the receiver regeneration action. If I heard both the transmitter and the receiver regenerative detector oscillating on the same 75A3 dial setting, I was on frequency. This was probably not a problem in 1951 since all novices were "rock bound". No one expected a response to a CQ to be on their transmit frequency. Everyone tuned the band looking for a call. That habit discontinued with the very stable and accurate transceivers that have been in use for several years. I found the receiver sensitive to the power supply transformer magnetic field. Placing the power supply as far as possible from the receiver cured this problem. Some of today's hams might complain about crystal control. Given the basic receiver of the 50s era, crystal control helped a lot to keep novices legal. A crystal is always on frequency. A drifty VFO tracked by a receiver with minimal frequency readout accuracy in a relatively small slice of the ham band leads to a high risk of one operating out of the band limits. I found crystal control to be a good design balance with the receiver. Conclusion As a beginner station, this receiver and transmitter would have gotten the new novice on the air with a minimum investment. Some contacts may have been made but it would not have been easy. I suspect that many would have become discouraged and dropped out before moving to something better. By the 1956 ARRL Handbook the two tube regen was being presented only as the minimum "shortwave receiver" useful for code practice and for listening to amateur and commercial stations. By then a three tube superhet (converter + regen detector + audio amp) is shown as minimum receiver for the novice. It is also interesting to note that by 1958 the entry novice transmitter shown in the ARRL Handbook was a 3-band 6DQ6 transmitter running 35 watts.
A 1951 Novice Station
A 1951 Novice Station Introduction In 1951 "The Roy Rogers Show," "I Love Lucy" and "Mr. Wizard" were all new to television. In 1951 General Douglas MacArthur, relieved of his duties by President Truman,
More informationA 75-Watt Transmitter for 3 Bands Simplified Shielding and Filtering for TVI BY DONALD H. MIX, W1TS ARRL Handbook 1953 and QST, October 1951
A 75-Watt Transmitter for 3 Bands Simplified Shielding and Filtering for TVI BY DONALD H. MIX, W1TS ARRL Handbook 1953 and QST, October 1951 The transmitter shown in the photographs is a 3-stage 75-watt
More informationA GOOD REGENERATIVE RECEIVER WITH SIMPLE FINE TUNING (2008)
A GOOD REGENERATIVE RECEIVER WITH SIMPLE FINE TUNING (2008) A good SSB-CW-AM regenerative receiver with a fine tuning by moving the wooden stick with a grounded piece of PCB towards the coil. A good regenerative
More informationBuilding the Sawdust Regenerative Receiver
Building the Sawdust Regenerative Receiver Introduction The Sawdust is a super regenerative receiver using the basic Armstrong design architecture. The receiver uses one toroidal transformer to provide
More informationHOM rev. new Heathkit of the Month #79: by Bob Eckweiler, AF6C. Heath of the Month #79 - VF-1 VFO AMATEUR RADIO - SWL
Heathkit of the Month #79: by Bob Eckweiler, AF6C AMATEUR RADIO - SWL Heathkit VF-1 External VFO (Variable Frequency Oscillator). Introduction: In 1951 the FCC totally revamped the license classes for
More informationfile:///c /BoatAnchors/Hammarlund/HQ170A/HQ170SVC.TXT Dear OM: This form is being prepared to provide prompt attention to a complaint as a result of trouble that may be experienced in the field. In addition
More informationBuilding the Sawdust Regenerative Receiver
Building the Sawdust Regenerative Receiver Introduction The Sawdust is a super regenerative receiver using the basic Armstrong design architecture. The receiver uses one toroidal transformer to provide
More informationRadio Receivers. Al Penney VO1NO
Radio Receivers Al Penney VO1NO Role of the Receiver The Antenna must capture the radio wave. The desired frequency must be selected from all the EM waves captured by the antenna. The selected signal is
More informationInterference & Suppression Page 59
INTERFERENCE Interference & Suppression Page 59 Front-End Overload, Cross-Modulation What is meant by receiver overload? Interference caused by strong signals from a nearby transmitter What is one way
More informationHow The Transmitter Works
Mike Bray, K8DDB Refer to the schematic of the transmitter on page 7 of the manual. The crystal-controlled oscillator, V generates a small amount of r.f. power which is used to drive the amplifier, V2.
More informationModifying The Heath HA-14 For 6 Meters Greg Chartrand - W7MY 4/22/07
Introduction The Heathkit HA-14 was one of the few electron tube linear amplifiers intended for mobile use but few were purchased with the 12 volt mobile power supply. Most hams bought the HA-14 for base
More informationRadio Receivers. Al Penney VO1NO
Radio Receivers Role of the Receiver The Antenna must capture the radio wave. The desired frequency must be selected from all the EM waves captured by the antenna. The selected signal is usually very weak
More informationINSTRUCTIONS FOR INSTALLATION AND OPERATION OF THE MEISSNER SIGNAL SHIFTER MODEL EX
INSTRUCTIONS FOR INSTALLATION AND OPERATION OF THE MEISSNER SIGNAL SHIFTER MODEL EX I. INTRODUCTION A. The MEISSNER SIGNAL SHIFTER is a variable frequency exciter, with output over the entire ranges of
More informationFrequency range: BAND RANGE MHz MHz
INSTRUCTION SHEET NO. 20 POWER-MITE PM3 and PM3A DESCRIPTION The Power-Mite 3 and 3A are self-contained CW transceivers covering 40 and 20 meters. The receiver is compromised of a variable oscillator operating
More informationHOM rev. new. Heath of the Month #80 - K-1 All-Wave Receiver. Heathkit of the Month #80: by Bob Eckweiler, AF6C AMATEUR RADIO - SWL
Heathkit of the Month #80: by Bob Eckweiler, AF6C AMATEUR RADIO - SWL The Heathkit K-1 Three-Tube All-Wave Beginner s Receiver Some K-1 All-Wave Receiver History: The first piece of radio equipment using
More informationKnight Kit V44 VFO Stabilized by the Cumbria Design X-Lock 3.0
Knight Kit V44 VFO Stabilized by the Cumbria Design X-Lock 3.0 The Knight V44 VFO has a place in history. It was designed in the late 1950 s as a self contained VFO intended to plug into the crystal socket
More informationThe G4EGQ RAE COURSE Lesson 9 Transmitters Lesson 8 looked at a simple transmitter exciter comprising of oscillator, buffer and multiplier stages.
Lesson 8 looked at a simple transmitter exciter comprising of oscillator, buffer and multiplier stages. The power amplifier The output from the exciter is usually very low and it is necessary to amplify
More informationADJUSTING YOUR HF RECEIVER
ADJUSTING YOUR HF RECEIVER N5KIP January 31, 2017 Disclaimers What works on one model of radio might not work well on another CW (narrow bandwidth) and SSB (wider bandwidth) will require different receiver
More informationMODEL FS-4 INSTRUCTION MANUAL R.L. DRAKE COMPANY, MIAMISBURG, OHIO, U.S.A.
MODEL FS-4 F R E Q U E N C Y S Y N T H E S I Z E R INSTRUCTION MANUAL R.L. DRAKE COMPANY, MIAMISBURG, OHIO, U.S.A. LIMITED WARRANTY R. L. DRAKE COMPANY warrants to the original purchaser that this product
More informationThe Canadian WS 52 was designed and built in Canada by Canadian Marconi. It could be used either as a vehicle set or a ground station.
THE CANADIAN WIRELESS SET NO 52 Alan Morriss, G4GEN The Canadian WS 52 was designed and built in Canada by Canadian Marconi. It could be used either as a vehicle set or a ground station. The set was intended
More informationOzark Patrol Assembly Manual
Ozark Patrol Assembly Manual Copyright 2014 David Cripe NM0S The 4 State QRP Group Thank you for purchasing a Ozark Patrol kit. We hope you will enjoy building it and and find it a fun addition to your
More information75 Meter SSB Project Design by KD1JV Built by Paul Jorgenson KE7HR NSS 39382FE
75 Meter SSB Project Design by KD1JV Built by Paul Jorgenson KE7HR NSS 39382FE After completing a 75 meter DSB project (and using it underground, caving), I wanted to try building a SSB rig. I was searching
More information4/30/2012. General Class Element 3 Course Presentation. Practical Circuits. Practical Circuits. Subelement G7. 2 Exam Questions, 2 Groups
General Class Element 3 Course Presentation ti ELEMENT 3 SUB ELEMENTS General Licensing Class Subelement G7 2 Exam Questions, 2 Groups G1 Commission s Rules G2 Operating Procedures G3 Radio Wave Propagation
More informationKWM-2/2A Transceiver THE COLLINS KWM-2/2A TRANSCEIVER
KWM-2/2A Transceiver Click the photo to see a larger photo Click "Back" button on browser to return Courtesy of Norm - WA3KEY THE COLLINS KWM-2/2A TRANSCEIVER Unmatched for versatility, dependability and
More informationAmateur Radio Examination EXAMINATION PAPER No. 276 MARKER S COPY
01-3-(a) The Amateur Service in New Zealand is administered through this prime document: a the New Zealand Radiocommunications Regulations b the Broadcasting Act c the Telecommunications Act d the Radio
More informationSUBELEMENT T4. Amateur radio practices and station set up. 2 Exam Questions - 2 Groups
SUBELEMENT T4 Amateur radio practices and station set up 2 Exam Questions - 2 Groups 1 T4A Station setup: connecting microphones; reducing unwanted emissions; power source; connecting a computer; RF grounding;
More informationA 100-Watt Transmitter Using a Pair of VT1625s
12/16/2007 6:00 PM VT1625 100 Watt Transmitter A 100-Watt Transmitter Using a Pair of VT1625s FIG. 10.6 A 100-watt transmitter for five bands, using salvaged TV power transformer and surplus 1625 amplifier
More informationhallicrafters PERFORMANCE SPECIFICATIONS MODEL: SR-2000 LATEST REVISION: 18 JAN 66 Code ident # Specification #
hallicrafters PERFORMANCE SPECIFICATIONS MODEL: SR-2000 LATEST REVISION: 18 JAN 66 Code ident # 26916 Specification # 093-002154 I. GENERAL A. Power input 117V 50-60 cycles from a source capable of delivering
More informationKILOWATT GROUNDED-GRID LINEAR AMPLIFIER (Radiotron HB) Grounded-grid amplifiers The input voltage is applied to the cathode, the grid is earthed, and the output is taken from the plate, being in phase
More informationCentral Electronics Model 600L Linear Amplifier
INTRODUCTION This manual has been reproduced by James Lawrence, NA5RC, a 600L owner. Text no longer applicable such as insurance claim with the carrier has been deleted. Some capitalization and grammar
More information51J-4 COMMUNICATIONS RECEIVER
51J-4 COMMUNICATIONS RECEIVER Transcribed from 520-5014-00 August 15, 1954 GENERAL DESCRIPTION The Collins 51J-4 Receiver is designed for communication applications where stability and dial accuracy of
More informationThe Walford Electronics Ford Receiver Kit Project Construction Manual
The Walford Electronics Ford Receiver Kit Project Construction Manual Walford Electronics Ford Receiver construction manual V1.5 Page 1 of 22 Introduction The Ford receiver has four stages: The first stage
More informationRecent Restorations and Acquisitions
Recent Restorations and Acquisitions National NC-2-40DT The National NC-2-40DT has been in the boat anchor collection at K9STH for many years. However, it was recently completely restored both electrically
More informationAssembly Manual V1R2B-Rev1.0D
Assembly Manual V1R2B-Rev1.0D for 4 State QRP MagicBox - Solid State Transmit/Receive System Designed by: Jim Kortge, K8IQY Copyright 2009-2012 - All rights reserved This system is the result of some brainstorming
More informationThe ROSE 80 CW Transceiver (Part 1 of 3)
Build a 5 watt, 80 meter QRP CW Transceiver!!! Page 1 of 10 The ROSE 80 CW Transceiver (Part 1 of 3) Build a 5 watt, 80 meter QRP CW Transceiver!!! (Designed by N1HFX) A great deal of interest has been
More informationTechnician Licensing Class. Lesson 4. presented by the Arlington Radio Public Service Club Arlington County, Virginia
Technician Licensing Class Lesson 4 presented by the Arlington Radio Public Service Club Arlington County, Virginia 1 Quiz Sub elements T6 & T7 2 Good Engineering Practice Sub element T8 3 A Basic Station
More informationHT-1A Dual Band CW QRP Transceiver. Kit Building Instructions
HT-A Dual Band CW QRP Transceiver Kit Building Instructions Rev B, July 8, 08 Designed by BD4RG Exclusively distributed by CRKITS.COM and its worldwide distributors Join the group http://groups.io/g/crkits
More informationSOME USES FOR RF1,RF5 and VA1 ANALYSTS. SWR Measurement
SOME USES FOR RF1,RF5 and VA1 ANALYSTS THE HANDIEST INSTRUMENTS IN DECADES! When you put up an antenna in the the old days, it could be a real struggle. The only way to tell if it was tuned to the right
More informationRadiØKit Μ CW HAM RADIO TRANSCEIVER KIT. Assembly and operating manual
RadiØKit-120 20Μ CW HAM RADIO TRANSCEIVER KIT Assembly and operating manual Boreiou Ipirou 78 Kolonos Athens- Greece - 10444 Tel: 210.5150527 210.5132673 www.freebytes.com Thank you for buying RadiØKit-1,
More informationStep by Step Building PJ meter ARDF Receiver Kit. CRKITS.COM August 5, 2013
Step by Step Building PJ-80 80-meter ARDF Receiver Kit CRKITS.COM August 5, 2013 What is ARDF? ARDF is the abbreviation of Amateur Radio Direction Finding, or so called Fox Hunting. If you are looking
More informationE-200D ALIGNMENT. See the end of the procedure for the location of the calibration points. EQUIPMENT REQUIRED
E-200D ALIGNMENT NOTE: This is not an official B&K alignment procedure. This procedure was created by experimenting with an E-200D. However when this procedure is followed, the resulting calibration should
More informationHomebrew and Experimenters Group HF Inductance Bridge (Compiled by VK2TOX)
Homebrew and Experimenters Group HF Inductance Bridge (Compiled by VK2TOX) There are a number of ways to measure inductances used in construction of RF equipment. One of the most versatile ways is with
More informationAmateur Radio Examination EXAMINATION PAPER No. 275 MARKER S COPY
01-6-(d) An Amateur Station is quoted in the regulations as a station: a for training new radio operators b using amateur equipment for commercial purposes c for public emergency purposes d in the Amateur
More informationImproved Ionospheric Propagation With Polarization Diversity, Using A Dual Feedpoint Cubical Quad Loop
Improved Ionospheric Propagation With Polarization Diversity, Using A Dual Feedpoint Cubical Quad Loop by George Pritchard - AB2KC ab2kc@optonline.net Introduction This Quad antenna project covers a practical
More informationArchivist s Note: The plans are mislabeled and are actually for a tube-driven tremolo. See letter to the editor at the end of this document.
Archivist s Note: The plans are mislabeled and are actually for a tube-driven tremolo. See letter to the editor at the end of this document. Build Your Own Vibrato Make like Elvis with an "electronic"
More informationN3ZI Kits General Coverage Receiver, Assembly & Operations Manual (For Jun 2011 PCB ) Version 3.33, Jan 2012
N3ZI Kits General Coverage Receiver, Assembly & Operations Manual (For Jun 2011 PCB ) Version 3.33, Jan 2012 Thank you for purchasing my general coverage receiver kit. You can use the photo above as a
More informationS-Pixie QRP Kit. Student Manual. Revision V 1-0
S-Pixie QRP Kit Student Manual Revision V 1-0 Introduction The Pixie 2 is a small, versatile radio transceiver that is very popular with QRP (low power) amateur radio operators the world over. It reflects
More informationMFJ-203 Bandswitched Dip Meter
MFJ-203 Bandswitched Dip Meter Thank you for purchasing the MFJ-203 Bandswitched Dip Meter. The MFJ-203 Bandswitched Dip Meter is a solid state bandswitched adaptation of the traditional grid dip meter.
More informationCopyright 2012, R. Eckweiler & OCARC, Inc. Page 1 of 5
Heathkit of the Month #42: by Bob Eckweiler, AF6C Heathkit HD-1422-A Antenna Noise Bridge Introduction: If you work with antennas, an antenna noise bridge can be a very handy tool. Table 1 lists some of
More informationC.M.HOWES COMMUNICATIONS CTU150 Instructions
CTU150 Instructions The HOWES CTU150 is an antenna matching unit for use with shortwave transmitters and receivers. A novel constructional method is used - all parts being mounted on a Printed Circuit
More informationCON NEX HP. OWNER'S MANUAL Full Channel AM/FM Amateur Mobile Transceiver TABLE OF CONTENTS TUNING THE ANTENNA FOR OPTIMUM S.W.R..
TABLE OF CONTENTS PAGE SPECIFICATIONS... 2 INSTALLATION... 3 LOCATION... 3 CON NEX - 4300HP MOUNTING THE RADIO... 3 IGNITION NOISE INTERFERENCE... 4 ANTENNA... 4 TUNING THE ANTENNA FOR OPTIMUM S.W.R..
More informationWA3RNC 30 METER CRYSTALPLEXER TRANSMITTER KIT ASSEMBLY INSTRUCTIONS
WA3RNC 30 METER CRYSTALPLEXER TRANSMITTER KIT ASSEMBLY INSTRUCTIONS Description The WA3RNC 30 Meter Crystalplexer is a low power crystal controlled QRP transmitter offering a significantly improved tuning
More informationMIZUHO Rose-Kit series 1W CW QRP 7 / 21 MHz Transmitter Kit MODEL QP-7 QP-21 3,000 ASSEMBLY MANUAL. Easy Construction. Construction.
MIZUHO Rose-Kit series 1W CW QRP 7 / 21 MHz Transmitter Kit MODEL QP-7 QP-21 2. Buffer/Amplifier This stage isolates the oscillator from the power amplifier and the antenna. 3. Power Amplifier This stage
More informationMFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS
MFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS Introduction...2 Powering The MFJ-219/219N...3 Battery Installation...3 Operation Of The MFJ-219/219N...4 SWR and the MFJ-219/219N...4 Measuring
More informationSome KWM-2/2A Tricks. January By Georges, F6CER CCAE# 098. Some KWM-2/2A Tricks -
Some KWM-2/2A Tricks January 2016 By Georges, F6CER CCAE# 098 Some KWM-2/2A Tricks Most of the KWM-2 transceivers that can be found in Europe belong to the first generation manufactured at the beginning
More informationLBI-4938C. Mobile Communications MASTR II POWER AMPLIFIER MODELS 4EF4A1,2,3. Printed in U.S.A. Maintenance Manual
C Mobile Communications MASTR II POWER AMPLIFIER MODELS 4EF4A1,2,3 Printed in U.S.A. Maintenance Manual TABLE OF CONTENTS DESCRIPTION.................................................... 1 CIRCUIT ANALYSIS.................................................
More informationVery Narrow Frequency Spread < 200 Hz between units
Low Power 10 Meter QRP Transmitters. for beacons 9. 2 3 2 Sick of Superheterodyne? 0HF UHF VHF Antennas In-Stock Direct Conversion 8. Mixers DIrect 4 Antennas for commercial and military Modulators and
More informationAn Easy-To-Build VFO
An Easy-To-Build VFO By Lewis G. McCoy, W1ICP A VFO can he substituted in place of crystals and will permit the amateur to change his frequency to any point in the 80 or 40-meter bands. In other words,
More informationCX7 Troubleshooting Index
CX7 Troubleshooting Index Modification S/1 Newsletter Guide Board Description A/TO A/TO MODE Intermod V1,12 P4.4 A11 Shut off one 35 MHz osc in receive, done sn 244 A/TO Spur V1,12 P1 Reduce A/TO spur,
More informationIntroduction LOADING COIL COUNTERPOISE ATTACHMENT ANTENNA ATTACHMENT. Figure 1: MFJ-1625 Window/Balcony Mount Antenna
Introduction MFJ-1625 The MFJ-1625 is a 200 Watt antenna tuner that was designed to provide portable or permanent HF communications on 80 through 10 meters and VHF on 6 meters. The universal mount design
More informationNational HRO Receivers. Presented to the Ozaukee Radio Club May 10, 2017 Patrick Volkmann W9JI
National HRO Receivers Presented to the Ozaukee Radio Club May 10, 2017 Patrick Volkmann W9JI Why the HRO? In the 1930 s a superhetrodyne receiver was considered almost useless for shortwave work. James
More informationTreetop Circuits Owner s Manual for SB-SB-600 Adapter Version 1
The SB-600 SSB adapter from Treetop Circuits (Fig. 1) is designed specifically as an accessory to the Hammarlund SP-600 series of receivers. It provides enhanced performance on SSB and CW signals, using
More informationOperation Manual. SlJPER ST AR Channel Mobile 5-Mode Transceiver -----~- --:.. KTSS200NXX ,, I
Operation Manual!.,, SlJPER ST AR 2000 200 Channel Mobile 5-Mode Transceiver -----~- --:.. KTSS200NXX General Description l Frequency/Channel Chart The Super Star -2000 is a combination transmitter-receiver
More informationRadio Station Setup and Electrical Principles
Radio Station Setup and Electrical Principles Covers sections: T4A-T5D Seth Price, N3MRA February 20, 2016 Outline 4.1 Station Setup 4.2 Operating Controls 4.3 Electronic Principles 4.4 Ohm s Law 4.5 Power
More information1 TRANSISTOR CIRCUITS
FM TRANSMITTERS The first group of circuits we will discuss are FM TRANSMITTERS. They can be called SPY TRANSMITTERS, FM BUGS, or a number of other interesting names. They all do the same thing. They transmit
More informationALWAYS ATTACH THE SAFETY ROPE TO A STABLE SUPPORT BEFORE ATTEMPTING TO ATTACH THE UNIVERSAL MOUNT TO A WINDOW FRAME OR RAIL.
MFJ-1623 Introduction The MFJ-1623 was designed to provide portable or permanent HF communications on 30 through 10 meters and VHF on 6 meters. The universal mount design allows the user to install the
More informationOperating Station Equipment
Amateur Radio License Class Operating Station Equipment Presented by Steve Gallafent October 3, 2007 Operating Station Equipment Modulation Modulation is the process of adding information to a radio signal
More informationA 40m Direct Conversion Receiver project to upgrade from ZR to ZS
A 40m Direct Conversion Receiver project to upgrade from ZR to ZS Hannes Coetzee, ZS6BZP, B.Eng Elektronic (Pretoria) A simple receiver with a low component count is described for the 40m Amateur band.
More informationTechnician License Course Chapter 3 Types of Radios and Radio Circuits. Module 7
Technician License Course Chapter 3 Types of Radios and Radio Circuits Module 7 Radio Block Diagrams Radio Circuits can be shown as functional blocks connected together. Knowing the description of common
More informationssb transceiver single-band using the LM373 communications IC
single-band ssb transceiver using the LM373 communications IC How to use the versatile LM373 and several other ICs to build a compact ssb transceiver for 14 MHz About two years ago a new products announcement
More informationThe Electro-Magnetic Spectrum
The Electro-Magnetic Spectrum Part Three In This Issue: All about Tubes How a diode rectifier works How a triode amplifier works How the mixer in your receiver works Dear Friends: For quite some time I
More informationOperation Manual. Model SG Elenco Precision Wide Band Signal Generator
99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.testequipmentdepot.com Elenco Precision Wide Band Signal Generator Model SG-9000 Operation Manual CONTENTS
More informationLesson 9: Base Stations
Lesson 9: Base Stations Preparation for Amateur Radio Technician Class Exam Topics Home Stations Basic Station Layout RTTY and Data Communications Station Accessories Wavelengths Feed Lines Impedance-matching
More informationAmateur Radio Examination EXAMINATION PAPER No. 260 MARKER S COPY
01-7-(a) An authorised officer from the Ministry of Business, Innovation & Employment can inspect a General Amateur Operator's Certificate of Competency: a at any time b during business hours c at any
More informationMC24O OWNER'S MANUAL STEREO POWER AMPLIFIER CONTENTS
STEREO POWER AMPLIFIER MC24O CONTENTS GENERAL DESCRIPTION 1 TECHNICAL DESCRIPTION 1 PANEL FACILITIES 4 INSTALLATION 5 CONNECTIONS 5 Input Stereo 5 Input Twin Amp 5 Input Mono 6 Output Stereo or Twin Amp
More informationElmer Session Hand Out for 3/3/11 de W6WTI. Some Common Controls Found On Amateur Radio Transceivers. (From ARRL web site tutorial)
Elmer Session Hand Out for 3/3/11 de W6WTI Some Common Controls Found On Amateur Radio Transceivers. (From ARRL web site tutorial) The placement of the controls may vary from manufacturer to manufacturer
More informationAmateur Wireless Station Operators License Exam
Amateur Wireless Station Operators License Exam Study material 2017 South India Amateur Radio Society, Chennai CHAPTER 5 1 Chapter 5 Amateur Wireless Station Operators License Exam Study Material Chapter
More informationYana Dongles Tom Berger K1TRB (c)2016 v171227
Yana Dongles Tom Berger K1TRB (c)2016 v171227 These notes elaborate some items described in the Build notes, and add some more dongles enhancing Yana. Every effort has been exerted to save on the cost
More informationHAMTRONICS TB901 FM EXCITER INSTALLATION, OPERATION, & MAINTENANCE
HAMTRONICS TB901 FM EXCITER INSTALLATION, OPERATION, & MAINTENANCE GENERAL INFORMATION. The TB901 is a single-channel low power fm transmitter (exciter) designed to provide 300-600 milliwatts continuous
More informationMTR-3B - LCD edition
MTR-3B - LCD edition Mountain Topper User Manual Overview: The Mountain Topper Rigs are designed to be a very small, light weight, very battery efficient, multi-band CW rig suitable for field operation.
More informationYoukits SK-1A 40m SSB/CW QRP Transceiver. Operating manual
Youkits SK-1A 40m SSB/CW QRP Transceiver Operating manual Specifications Size: 88*38*124mm (not including knob, etc.) Weight: about 280g (not including battery pack) Supply voltage: 10-15VDC Current drain
More informationTube Regenerative Receiver
Tube Regenerative Receiver Inspired by an old movie I saw one late night, I thought I'd have a crack at building something with tubes (this was my first tube project). I was a bit turned off at the thought
More informationA Digital HF Mode By N4UFP Marc Tarplee. Tweaks by K7AGE
A Digital HF Mode By N4UFP Marc Tarplee Tweaks by K7AGE A Digital HF Mode By N4UFP Marc Tarplee Tweaks by K7AGE First, a little bit about me I was first licensed in 1968 I ve been around video since high
More informationDX AM FM SSB CW PA Amateur Base Station Transceiver OWNER S MANUAL RX / TX 2 4 POWER NF CHANNEL MODE RF POWER OFF CAL OFF OFF CALIBRATE
1 2 3 6 4050 ULA 6070 TI 80 90 100 9 DX 2517 2517 RX / TX 0 2 4 SWR WATTS SET 81012 22 1 010 3 2030 5 MOD 7 ON dbover 9 SIGNAL +20 +40+60 PA FM AM USB LSB CW POWER ON SWR NB / ANL R.BEEP +10KHz NF CHANNEL
More informationMFJ-249B HF/VHF SWR ANALYZER
TABLE OF CONTENTS MFJ-249B... 2 Introduction... 2 Powering The MFJ-249B... 3 Battery Installation... 3 Alkaline Batteries... 3 NiCd Batteries... 4 Power Saving Mode... 4 Operation Of The MFJ-249B...5 SWR
More informationGeneral Licensing Class Circuits
General Licensing Class Circuits Valid July 1, 2011 Through June 30, 2015 1 Amateur Radio General Class Element 3 Course Presentation ELEMENT 3 SUB-ELEMENTS (Groupings) Your Passing CSCE Your New General
More informationTransceiver selection and Specs.
Transceiver selection and Specs. Transceivers 1956-2018 From TUBES to SDR Covers 20-10 meters in 100Khz segments, 10 available, crystal needed for each. Plug in crystal holder. 100 Watts output, final
More informationLED S METER CONSTRUCTION MANUAL. LED S meter Construction Manual Issue 1.0 Page 1
LED S METER CONSTRUCTION MANUAL LED S meter Construction Manual Issue 1.0 Page 1 Important Please read before starting assembly STATIC PRECAUTION The LED S Meter kit contains components which can be damaged
More informationReference Files for Vintage Low Power by Ralph E. Taggart, WB8DQT. The following reference information is provided to supply more detailed information
Taggart_Jan12 Page 1 of 5 Reference Files for Vintage Low Power by Ralph E. Taggart, WB8DQT The following reference information is provided to supply more detailed information relating to the selection
More informationHW-8-TR V3 PARTS LIST
HW-8-TR V3 PARTS LIST Qty Ref Description Markings 4C2 C3 C4 C5 Capacitor Disc.1ls.1uF 104 1 C1 Capacitor Disc.2ls.1uF 100V 104 1 QSKMOD-C92 Capacitor Electrolytic 1uF 50V 1 QSKMOD Capacitor Mylar.47uF
More information22A3 Monaural Amplifier Owner s Manual
22A3 Monaural Amplifier Owner s Manual www.bandwidthaudio.com sales@bandwidthaudio.com WARNING Never power on the amplifier without connecting a proper load Failure to do so will result in permanent damage
More informationThe K290R Project. Steve Kavanagh, VE3SMA, December 2017
The K290R Project Steve Kavanagh, VE3SMA, December 2017 Background I have been using a pair of Yaesu FT-290R 2m transceivers as IF rigs for microwave transverters for many years. My 2.3, 3.4, 5.7, 10 and
More informationPLEASE READ THIS MANUAL BEFORE ATTEMPTING TO OPERATE EQUIPMENT!!
PLEASE READ THIS MANUAL BEFORE ATTEMPTING TO OPERATE EQUIPMENT!! UNPACKING INSTRUCTIONS 1. Carefully lift the amplifier by the bottom cabinet edge out of the shipping carton. Place the amplifier on a firm,
More informationTest Equipment. PHYS 401 Physics of Ham Radio
Test Equipment Voltmeter - an instrument that is used to measure voltage. It is used in parallel with a circuit to be measured. a series resistor extends the range of the meter. Ammeter - an instrument
More informationConstruction Manual 4m-Linear-Transverter XV4-15
Construction Manual 4m-Linear-Transverter XV4-15 Holger Eckardt DF2FQ Kirchstockacherstr. 33 D-85662 Hohenbrunn 3207 Technical data exciter frequency: 21.0... 21.5 MHz RF frequency: 70.0.. 70.5 MHz supply
More informationBuilding a Bitx20 Version 3
Building a Bitx20 Version 3 The board can be broken into sections and then built and tested one section at a time. This will make troubleshooting easier as any problems will be confined to one small section.
More informationRangeMaster Trouble-shooting Manual
RangeMaster Trouble-shooting Manual Page # 2 1. Tools you should have 3 2. What to do first 3 2.1 Most common problems 4 4 5 6 3. Low Range 3.1 Low Range/ Audio 4. Low Range 5. Tracing audio problems 7
More informationRITEK RIT for Collins KWM-2/2A 10/01/2002
RITEK RIT for Collins KWM-2/2A 10/01/2002 The RITEK RIT (receiver incremental tuning) control was developed for KWM-2/2A in 1992 to "clarify" received signals differing from the transmit frequency indicated
More informationHOMEBREW Q-MULTIPLIER
HOMEBREW Q-MULTIPLIER This circuit can boost the signal strength in your receiver by 1 or 2 S-units, giving approximately 10 db gain. A Q-multiplier amplifies the Q of the first IF transformer so that
More informationManual AMERITRON QSK-5PC T/R SWITCH PC BOARD INTRODUCTION
Manual Instruction AMERITRON QSK-5PC T/R SWITCH PC BOARD INTRODUCTION The Ameritron QSK-5PC is a PIN diode QSK circuit board designed for use in Ameritron's AL-80A, AL-80B, AL-82, AL-1500 and AL- 1200
More information