Technical Corner

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FT100 11m ('wideband') mod FT100 11m ('wideband') mod rob · September 18, 2021, 09:19:28 pm The details for modding the Yaesu FT100 to include 11m are readily available on the net, with the mod details having being poste... 0 Replies · 1983 Views Started by rob	0 Replies 1983 Views	September 18, 2021, 09:19:28 pm by rob
Band Pass Filter for 27Mhz Band Pass Filter for 27Mhz guest2 · September 24, 2021, 09:22:01 pm Here's a quick look at a "BPF" for the 11mtr band. This particular Band Pass Filter was built out of necessity for the current W... 1 Replies · 3197 Views Started by guest2	1 Replies 3197 Views	September 29, 2021, 11:32:03 pm by rob
The LPAM Medium Wave Antenna The LPAM Medium Wave Antenna AM081 · January 13, 2022, 10:27:32 pm Here's a basic design for building a 30FT / 10 Meter LPAM Medium Wave Antenna. This antenna is basically comprised of a vertical... 0 Replies · 3163 Views Started by AM081	0 Replies 3163 Views	January 13, 2022, 10:27:32 pm by AM081
AM Valve Transmitter. AM Valve Transmitter. ZoZo · June 07, 2024, 08:51:32 am Video of an AM valve transmitter, which has been modified regarding its modulation technique. The video talks about the change f... 0 Replies · 3526 Views Started by ZoZo	0 Replies 3526 Views	June 07, 2024, 08:51:32 am by ZoZo
ic microcontroller Datasheets ic microcontroller Datasheets Dave · June 08, 2024, 12:10:49 am Place to upload data sheets for ic microcontrollers 0 Replies · 3471 Views Started by Dave	0 Replies 3471 Views	June 08, 2024, 12:10:49 am by Dave
Transistor datasheets Transistor datasheets Dave · June 08, 2024, 12:11:39 am Place to upload transistor datasheets and pinout diagrams. 8 Replies · 9437 Views Started by Dave	8 Replies 9437 Views	June 09, 2024, 04:58:04 pm by eye102
nrg 40 amp nrg 40 amp MonTaylor · July 05, 2024, 07:31:56 am Hello Radio Builders is there any checks i can do on this before i put in the BLW 60? i did run power to it like it is a saw a l... 2 Replies · 5948 Views Started by MonTaylor	2 Replies 5948 Views	July 05, 2024, 08:09:07 am by MonTaylor
BLF245 30W Broadcast Amplifier BLF245 30W Broadcast Amplifier ZoZo · June 16, 2024, 10:09:54 am Hi everyone, heres a FM Broadcast amplifier board designed a few years ago now. Its now a discountinued project, so free for eve... 5 Replies · 9006 Views Started by ZoZo	5 Replies 9006 Views	September 09, 2024, 01:15:29 am by eye102
Simple Digi-Vox Circuit Simple Digi-Vox Circuit guest2 · August 26, 2021, 07:14:22 pm This circuit for a simple Digi-Vox unit will allow easy connection between any CB or HF transceiver that is not VOX capable. Bel... 2 Replies · 5787 Views Started by guest2	2 Replies 5787 Views	March 20, 2025, 12:29:25 am by Albert H
CraneFly LPAM Transmitter CraneFly LPAM Transmitter ZoZo · March 29, 2025, 07:35:19 am Below is a now obsolete PCB design for a simple AM Medium Wave Transmitter, ideally design to work at the upper region of MW in ... 2 Replies · 6429 Views Started by ZoZo	2 Replies 6429 Views	July 08, 2025, 06:52:37 pm by MonTaylor
RPI to control a TX RPI to control a TX MonTaylor · July 24, 2025, 07:28:30 am im planning on using a RPI 4b to send a stream to a TX. i want to add a touch screen to the RPI and use it to turn the power on ... 0 Replies · 5884 Views Started by MonTaylor	0 Replies 5884 Views	July 24, 2025, 07:28:30 am by MonTaylor
Home Made Dummy Load Home Made Dummy Load AM081 · September 12, 2021, 04:52:21 pm There comes a time when when we're all going to need a dummy load at some point. The easiest option for most is to just simple b... 5 Replies · 7605 Views Started by AM081	5 Replies 7605 Views	November 06, 2025, 01:18:29 am by RIGMO
AM Broadcast 6KHz Compressor Limiter AM Broadcast 6KHz Compressor Limiter ZoZo · November 08, 2025, 06:20:22 am Here is a simple yet affective audio processor for AM / Medium Wave broadcasting using just one quad op-amp. In fact only 3 of 4... 1 Replies · 1988 Views Started by ZoZo	1 Replies 1988 Views	November 15, 2025, 11:24:40 am by Multiplex
Full Sinus Build Full Sinus Build MonTaylor · June 02, 2025, 02:50:17 pm Here is a full sinus build which consist of a limiter, RDS and a 1w PLL driver 8 Replies · 11717 Views Started by MonTaylor	8 Replies 11717 Views	November 16, 2025, 08:59:59 pm by Mirage
Smiley AMP Smiley AMP MonTaylor · November 13, 2025, 07:07:03 am Does anyone know where i can find details on the smiley AMP? i have a driver board and would like a matching AMP. the picture wa... 2 Replies · 3465 Views Started by MonTaylor	2 Replies 3465 Views	November 17, 2025, 07:27:02 am by MonTaylor
NRG PRO IV NRG PRO IV ZoZo · November 08, 2025, 09:41:48 am Here is the NRG PRO IV pcb. This version has only had a minor rework to the mounting holes and the tracing for one track in the ... 7 Replies · 3389 Views Started by ZoZo	7 Replies 3389 Views	November 17, 2025, 07:34:14 am by MonTaylor
Sinus Limiter Sinus Limiter eye102 · November 15, 2025, 07:17:51 pm Sinus Limiter files pcb parts list see attachment 2 Replies · 2058 Views Started by eye102	2 Replies 2058 Views	November 17, 2025, 05:49:02 pm by Radioclick1fm
RDS PROJECT 2 RDS PROJECT 2 RIGMO · November 18, 2025, 10:02:45 pm RDS project 2 http://www.g.laroche.free.fr/english/hardware/RDS_USB_ATmega32.html# 0 Replies · 2399 Views Started by RIGMO	0 Replies 2399 Views	November 18, 2025, 10:02:45 pm by RIGMO
RDS PROJECT 1 RDS PROJECT 1 RIGMO · November 18, 2025, 07:11:31 pm IS posible Build one as on PDF document https://www.youtube.com/watch?v=zWBzTjaiCIM 3 Replies · 2560 Views Started by RIGMO	3 Replies 2560 Views	November 22, 2025, 09:17:48 pm by Radioclick1fm
NRG FOUNDER (veronika) Stephen J Moss NRG FOUNDER (veronika) Stephen J Moss RIGMO · December 09, 2025, 08:50:24 am like everything today, capitalism carries on today. the only generator that is resistant to deviation is the seesaw used by Vero... 0 Replies · 864 Views Started by RIGMO	0 Replies 864 Views	December 09, 2025, 08:50:24 am by RIGMO
12m antenna mast very practical 12m antenna mast very practical Schmellenschmellen · December 05, 2025, 06:01:23 pm A lot of fun could be had with a copper wire ground plane antenna and one of these. I imagine you could tape one on made from an... 7 Replies · 4995 Views Started by Schmellenschmellen	7 Replies 4995 Views	December 12, 2025, 02:09:18 pm by radionortheast
What bleeder resistor What bleeder resistor radionortheast · December 19, 2025, 08:42:35 am With a long pole as aerial you get the wind blowing can built up static, also from thunderstorms, in the loft you still get the ... 2 Replies · 2042 Views Started by radionortheast	2 Replies 2042 Views	December 22, 2025, 09:22:49 am by radionortheast
Does anyone know how to download from here Does anyone know how to download from here fmradiotuner1 · December 18, 2025, 09:44:19 am Does anyone know how to download from hereI would like to DL or torrent this but really dont get it.https://system18.net/2025/12... 6 Replies · 2999 Views Started by fmradiotuner1	6 Replies 2999 Views	December 28, 2025, 09:40:15 am by Radioclick1fm
500W LPF 500W LPF ZoZo · June 15, 2024, 09:23:48 pm Been busy working the RadioBuilders own version of a 500W FM Broadcast LPF.Here's a sneak preview of the PCB [ Guests cannot vie... 27 Replies · 10160 Views Started by ZoZo « 1 2 »	27 Replies 10160 Views	January 03, 2026, 09:24:22 pm by Albert H
hardware silence detector . hardware silence detector . Radioclick1fm · December 28, 2025, 09:42:04 am good schematic if , anyone is going to make a pcb , please share it .i would like to try , Honestly a freind long time make me p... 1 Replies · 3987 Views Started by Radioclick1fm	1 Replies 3987 Views	January 03, 2026, 09:29:39 pm by Albert H

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