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
Beacon Project "Common and Precious II" (OFF air, 6.398.5kHz, 30W) Started by Zazzle « 1 2 3 »	40 Replies 155635 Views	July 24, 2018, 2316 UTC by Zazzle
U-LULU (Updated LULU) for 48 meters, 20 Watt Class-E AM Transmitter Started by Charlie_Dont_Surf « 1 2 3 4 »	50 Replies 106597 Views	October 06, 2026, 1758 UTC by Tonsku79
Beacon Project "Common and Precious" (OFF air, 10.237,5kHz, 5W) Started by Zazzle « 1 2 3 4 5 »	61 Replies 87831 Views	July 17, 2018, 1932 UTC by Zazzle
Beacon Project "Common and Precious III" (OFF air, 26510 kHz, 8W) Started by Zazzle « 1 2 3 »	41 Replies 84418 Views	August 07, 2018, 1754 UTC by syfr
Stretchyman “40W TX” Failure Investigation and Remediation Started by Charlie_Dont_Surf « 1 2 3 4 5 »	60 Replies 75342 Views	January 05, 2024, 0025 UTC by Zane
Beginner class D design Started by OgreVorbis « 1 2 3 4 5 6 »	81 Replies 68633 Views	June 12, 2019, 2122 UTC by OgreVorbis
Someone had Corsair II AM TX experience? Started by netsmo62 « 1 2 3 4 »	49 Replies 51573 Views	March 28, 2023, 1531 UTC by Stretchyman
Corsair transmitter and 6KHz limiter PCB made up Started by Intruder	14 Replies 46263 Views	April 21, 2025, 1632 UTC by The Mercian
Audio jacks/plugs as QRP RF wire quick connects Started by i_hear_you « 1 2 »	23 Replies 42420 Views	July 16, 2019, 1844 UTC by Pigmeat
Stretchyman 40w GaN TX is sick Started by Antennae « 1 2 3 »	39 Replies 42385 Views	June 27, 2020, 2100 UTC by Charlie_Dont_Surf
New here, and my journey building a SW xmtr Started by fieldstrength1947 « 1 2 3 4 5 »	60 Replies 39524 Views	October 09, 2018, 1502 UTC by R4002
Hellschreiber beacon - with some oomph! Started by Radiotech « 1 2 3 4 »	45 Replies 33154 Views	July 08, 2022, 0212 UTC by Charlie_Dont_Surf
A simple shortwave pirate transmitter build Started by makeRF « 1 2 »	17 Replies 32730 Views	September 10, 2013, 1443 UTC by RadioAnarchy
How wide is Wolverine Radio's signal? Started by bplipschitz	1 Replies 31244 Views	March 10, 2026, 0507 UTC by redhat
Can one use a CW transmitter to transmit voice? *edit, added link Started by Antennae	13 Replies 31170 Views	January 13, 2014, 0336 UTC by ff
Modulated 5W NS40 Started by Antennae « 1 2 3 »	33 Replies 30464 Views	September 11, 2020, 1311 UTC by syfr
Linear power amplifier with 10 W output for frequencies between 100 kHz and 2000 Started by Pieritz « 1 2 »	19 Replies 29914 Views	October 29, 2019, 0730 UTC by Stretchyman
5 watt crystal oscillator transmitter Started by makeRF	12 Replies 29733 Views	October 31, 2014, 0110 UTC by makeRF
Recommendations: Resistor and Capacitor Assortment Kits? Started by Rob.	4 Replies 29508 Views	August 21, 2019, 1905 UTC by Rob.
Simple SiC TX Started by Stretchyman « 1 2 3 »	30 Replies 26634 Views	June 22, 2019, 2200 UTC by Stretchyman

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