Direction finding systems and how to make your own
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1 Direction finding systems and how to make your own David G7URP... and friends! 1
2 Direction finding systems and how to make your own David G7URP... and friends! 1
3 Direction finding systems and how to make your own David G7URP... and friends! 1
4 Direction finding systems and how to make your own David G7URP... and friends! 1
5 Outline history of R D F...
6 Outline history of R D F... Earliest systems probably 1900 s
7 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF
8 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF 1912 Marconi Patent ship positioning by triangulation
9 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF 1912 Marconi Patent ship positioning by triangulation 1914 RDF was used in World War 1
10 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF 1912 Marconi Patent ship positioning by triangulation 1914 RDF was used in World War 1 Used on bottom of planes to home ground signals
11 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF 1912 Marconi Patent ship positioning by triangulation 1914 RDF was used in World War 1 Used on bottom of planes to home ground signals In second world war RADAR added to RDF systems
12 Outline history of R D F... Earliest systems probably 1900 s Marconi, Hertz, Hulsmeyer experimented with RDF 1912 Marconi Patent ship positioning by triangulation 1914 RDF was used in World War 1 Used on bottom of planes to home ground signals In second world war RADAR added to RDF systems Now Armed forces use to track frequency hopping
13
14 A US Navy High frequency direction finder
15 A US Navy High frequency direction finder
16 Amateur Direction finding 4
17 Amateur Direction finding Amateur direction finding started 1950 s - family cars 4
18 Amateur Direction finding Amateur direction finding started 1950 s - family cars Initially mainly 160m band as car radios medium wave 4
19 Amateur Direction finding Amateur direction finding started 1950 s - family cars Initially mainly 160m band as car radios medium wave Today still lot of Fox hunts on 160m - International 4
20 Amateur Direction finding Amateur direction finding started 1950 s - family cars Initially mainly 160m band as car radios medium wave Today still lot of Fox hunts on 160m - International Some clubs monthly foxhunts - eg Basingstoke ARC 4
21 Amateur Direction finding Amateur direction finding started 1950 s - family cars Initially mainly 160m band as car radios medium wave Today still lot of Fox hunts on 160m - International Some clubs monthly foxhunts - eg Basingstoke ARC 2 metres easy for beginners - most have 2m handys 4
22 Amateur Direction finding Amateur direction finding started 1950 s - family cars Initially mainly 160m band as car radios medium wave Today still lot of Fox hunts on 160m - International Some clubs monthly foxhunts - eg Basingstoke ARC 2 metres easy for beginners - most have 2m handys Also great for SWLs as no transmission needed 4
23 Practical RDF systems
24 Practical RDF systems Most of us already own a basic RDF receiver!
25 Practical RDF systems Most of us already own a basic RDF receiver!
26 Practical RDF systems Most of us already own a basic RDF receiver!
27 Practical RDF systems Most of us already own a basic RDF receiver!
28 Practical RDF systems
29 Practical RDF systems Main commercial kits by US firm Ramsey electronics
30 Practical RDF systems Main commercial kits by US firm Ramsey electronics A basic one for around 50 from W&S etc...
31 Practical RDF systems Main commercial kits by US firm Ramsey electronics A basic one for around 50 from W&S etc...
32 Practical RDF systems
33 Practical RDF systems And a much more sophisticated one...
34 Practical RDF systems And a much more sophisticated one...
35 Practical RDF systems And a much more sophisticated one...
36 Practical RDF systems And a much more sophisticated one... And Bob G8SDU has one ;o)
37 Practical RDF systems
38 Practical RDF systems Another semi-professional system by G3ZOI
39 Practical RDF systems Another semi-professional system by G3ZOI
40 Practical RDF systems Another semi-professional system by G3ZOI Very popular with Scouting and Youth Groups...
41 Practical RDF systems
42 Practical RDF systems So now the clubs own Direction Finder project, DF 100
43 Practical RDF systems So now the clubs own Direction Finder project, DF 100 Doug G3HUL developed from Practical Wireless ideas
44 Practical RDF systems So now the clubs own Direction Finder project, DF 100 Doug G3HUL developed from Practical Wireless ideas David G7URP engineered into easy to build kit
45 Practical RDF systems So now the clubs own Direction Finder project, DF 100 Doug G3HUL developed from Practical Wireless ideas David G7URP engineered into easy to build kit Kit of all electronic parts and cable just 4
46 Practical RDF systems So now the clubs own Direction Finder project, DF 100 Doug G3HUL developed from Practical Wireless ideas David G7URP engineered into easy to build kit Kit of all electronic parts and cable just 4 Just need tin, wire, battery, wood & use of 2m handy
47 The NARC DF100 kit
48 The NARC DF100 kit Dougs original prototype-worked well but hard to replicate!
49 The NARC DF100 kit Dougs original prototype-worked well but hard to replicate!
50 The NARC DF100 kit
51 The NARC DF100 kit The DF100 Circuit diagram:
52 The NARC DF100 kit The DF100 Circuit diagram:
53 The NARC DF100 kit
54 The NARC DF100 kit The main circuit board without coax connected
55 The NARC DF100 kit The main circuit board without coax connected
56 The NARC DF100 kit
57 The NARC DF100 kit Dipole elements made from coat hanger wire etc!
58 The NARC DF100 kit Dipole elements made from coat hanger wire etc!
59 The NARC DF100 kit
60 The NARC DF100 kit The finished unit can look like this...
61 The NARC DF100 kit The finished unit can look like this...
62 The NARC DF100 kit The finished unit can look like this... Or many other variations - choose which is best for you
63 So what next...
64 So what next... Collect a leaflet tonight or download
65 So what next... Collect a leaflet tonight or download Put together your own kit or buy kit for 3 (special)
66 So what next... Collect a leaflet tonight or download Put together your own kit or buy kit for 3 (special) Many people happy to help you build and test
67 So what next... Collect a leaflet tonight or download Put together your own kit or buy kit for 3 (special) Many people happy to help you build and test In 2 weeks time learn how to use RDF to find the fox!
68 So what next... Collect a leaflet tonight or download Put together your own kit or buy kit for 3 (special) Many people happy to help you build and test In 2 weeks time learn how to use RDF to find the fox! Make your kit by 4th June for Friendly Foxhunt
69 So what next... Collect a leaflet tonight or download Put together your own kit or buy kit for 3 (special) Many people happy to help you build and test In 2 weeks time learn how to use RDF to find the fox! Make your kit by 4th June for Friendly Foxhunt Have a go at winning the Trophy on 16th July!
70 Very soon you could be...
71 Very soon you could be...
72 Very soon you could be...
73 Very soon you could be...
74 Very soon you could be...
75 Very soon you could be...
76 Very soon you could be...
77 Very soon you could be...
78 Very soon you could be...
79 Very soon you could be...
80 Very soon you could be...
81 Just one word of warning...
82 Just one word of warning... Test your equipment first and take a map with you...
83 Just one word of warning... Test your equipment first and take a map with you...
84 Just one word of warning... Test your equipment first and take a map with you... Otherwise you could end up like poor Kevin in the middle of a protest march somewhere in Norfolk ;o)
85 NARC Direction Finding Fun!
86 NARC Direction Finding Fun! Brought to you by David G7URP, NARC and...
87 NARC Direction Finding Fun! Brought to you by David G7URP, NARC and...
88 NARC Direction Finding Fun! Brought to you by David G7URP, NARC and...
89 NARC Direction Finding Fun! Brought to you by David G7URP, NARC and...
90 NARC Direction Finding Fun! Brought to you by David G7URP, NARC and... Thank You!
91 Useful DF contacts NARC DF100 kit leaflet: G3ZOI DF kits G3ORY 80m kit RSGB RDF committee: Ramsey kits: Basingstoke ARC: HAVE FUN!
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