The RF Workbench

We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

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Subject / Started by	Replies / Views	Last post
A Simple Receiver Protection Device? And, a cheap DIY project. Started by ThaDood	0 Replies 11858 Views	September 26, 2025, 1337 UTC by ThaDood
Simple AM Transmitter with a MC1496 IC? Remember these? And, AN/NE 612? Started by ThaDood	0 Replies 10010 Views	September 20, 2025, 1814 UTC by ThaDood
Simplest PWM Started by Stretchyman	3 Replies 13666 Views	September 14, 2025, 0718 UTC by Stretchyman
easiest way to generate a C-QUAM AM Stereo signal Started by WSYLmw	0 Replies 9297 Views	August 18, 2025, 2310 UTC by WSYLmw
The Chebychev Filter Calculator. Nice to bookmark. Started by ThaDood	2 Replies 9880 Views	July 15, 2025, 0214 UTC by Charlie_Dont_Surf
Home-Brew, 20W, 5-Band HF Amp. Nice!!!! Started by ThaDood	0 Replies 8522 Views	June 16, 2025, 1629 UTC by ThaDood
Shortwave from summits (and other misc. questions) Started by BunnyEars	3 Replies 12742 Views	June 09, 2025, 1129 UTC by Stretchyman
Regulators in Use & Misuse by Harry Lythall - SM0VPO. Voltage REG's like LM78XX Started by ThaDood	0 Replies 8124 Views	May 04, 2025, 1603 UTC by ThaDood
The Discone Antenna? Here's how you could build one. Isotron rip... Started by ThaDood	0 Replies 8597 Views	May 02, 2025, 1726 UTC by ThaDood
Corsair transmitter and 6KHz limiter PCB made up Started by Intruder	14 Replies 46289 Views	April 21, 2025, 1632 UTC by The Mercian
My most downloaded circuit, on Archive .ORG, is the 555 Audio GEN? Um, ok... Started by ThaDood	0 Replies 6208 Views	April 11, 2025, 1532 UTC by ThaDood
Technical Tips from Mark W. Persons Arc Gap for AM Antenna Systems? Started by ThaDood	0 Replies 6145 Views	April 09, 2025, 1734 UTC by ThaDood
Opening up the Icom IC-705 for MARS operations? This, seems the best way? Started by ThaDood	0 Replies 10470 Views	January 16, 2025, 1631 UTC by ThaDood
MPJA closing Started by NJQA	1 Replies 6691 Views	January 15, 2025, 2038 UTC by Charlie_Dont_Surf
Aligning the Henry Radio 30A02 RF Amplifier? Good info to have. Started by ThaDood	1 Replies 6348 Views	January 15, 2025, 2037 UTC by Charlie_Dont_Surf
What's the highest frequency people have tested IRF series MOSFETs? Started by Kage	4 Replies 9913 Views	December 14, 2024, 0005 UTC by Charlie_Dont_Surf
Crystal manufacture in the 1940s Started by The Mercian	0 Replies 5934 Views	September 14, 2024, 1335 UTC by The Mercian
Radioberry Transmitter Started by owen81	3 Replies 7323 Views	September 10, 2024, 2314 UTC by boston_strangler
Pushing a SHORT Antenna With Loading Coil Started by NQC	7 Replies 10865 Views	July 27, 2024, 1652 UTC by Brian
Low-cost RF synthesizer uses generic ICs? Started by ThaDood	4 Replies 9932 Views	July 04, 2024, 2359 UTC by Charlie_Dont_Surf

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