I have a number of PDF format manuals, technical documents and images which you might find useful…some of which I had trouble locating, or have created myself. If you would like a copy of any of the documents listed, please drop me a line via the ‘contact’ page and let me know which one(s) you want and why. Don’t be offended if I ask you for evidence that you own the item you are requesting the manual for. 

The copyright on all material (if still in force) is fully acknowledged.  Please note that the G3PDM and G2DAF articles are copyright of the Radio Society of Great Britain, and are available here with their kind permission.

IMPORTANT: It seems that the less scrupulous out there (also known as ‘scumbags’) think it’s OK to download free stuff I’ve put here to help people, and then sell it on eBay. I have now removed the ‘easy download’ facility…if you’d like copies of the documents below, please contact me as above.  NOTE: Please don’t be offended when I ask you for a small donation to charity for some of the commercial manual documents. They are marked here as (*).

The Redifon R551N information is provided as a ‘set’ with other relevant files I have.


G3PDM Receiver – Mark 1 – Full article
G3PDM Receiver – Mark 2 – Part 1, Part 2, Part 3 and Part 4
G3PDM Receiver – Electroniques S3D-3 IF transformer pinout

G2DAF Mark 2 Receiver – From RSGB Handbook 5th Edition

G4AR Receiver by Eric Dowdeswell (6JH8 Mixer) – PW Epsom

Maplin Direct Conversion Receiver – Full feature (48MB)
Maplin Ranger 160m Receiver – Full feature (14MB)

Redifon R551N Receiver – (*) Main Receiver Service Manual
Redifon R551N Receiver – (*) ARU11 Synthesiser
Redifon R551N Receiver – (*) ARU18 Adaptor Common Antenna
Redifon R551N Receiver – (*) Unique High resolution set of schematics

Heathkit GC-1U Mohican – I have the schematic and setup / alignment information


AEL3030 HF SSB Transceiver – (*) Part 1, Part 2, Part 3 and Part 4 – This is a full technical manual with pictures, circuit diagrams, service and alignment information plus installation / operator instructions
Belcom FS1007P (includes schematics and mods) – FS1007P
Lake DTR7-5 QRP CW Transceiver for 40m


Advance Millivoltmeter VM77C (other variants available elsewhere)
Voxson car radio cassette schematics for GN7101 and GN7102 models
SEI Crystal Filter Data for 100KHz, 1.4MHz, 1.6MHz and 10.7MHz filters
JANDEK Antenna Noise Bridge Kit JD031
CODAR AT5 Instruction Manual
CODAR 12 Volt Power Supply Unit Type 12/MS