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I've been building the soldersmoke DCR at a leisurely pace over the couple of weeks. Started on the last section, the audio amp, today; built and tested the third stage.? WIll add the second stage

https://youtu.be/UaWN8P6Kt-M?feature=shared -- William, k6whp -------------------- "Cheer up, things could get worse. So I cheered up and things got worse."

BOM for the ADC-40, Version 1.0 attached.? Do not use.? Do not put anywhere. We need some people to double check it.? ASCII file.? Not cross referenced yet or spreadsheet format.? Typo 101. Here

Hi Steve, I was looking for "ADC-40" on YouTube; my bad. I've found it and will watch tonight. I'm interested in the RX also. I would like to build a good 40M direct conversion RX that's good enough

On 4/1/2025 1:25 PM, chuck adams via groups.io wrote: I have to put up an antenna this afternoon and get on 17m to start and complete WAS by the end of the year. Look for me, please. Love to do it all

Hi Chuck, I can't find the ADC-40 videos. Where do I look. Jim WB4ILP [email protected]> wrote:

I built the Soldersmoke Challenge DCR about 6 weeks ago and sent my non-video results to Bill and Dean. (Pete is not part of this project.) I didn't have the 3D-printed variable inductor form so used

Chuck, I thought you didn't like PTO's :) I was going to take up the challenge also but got distracted on my 2N2/40 build. I am one of the elite "6" who are watching your ADC-40 project! 73 Alan, N8WQ

Remember the VE3DNL generator from the qrp-l mail reflector?? Used 5.12MHz crystal with a divider to generate signals every 5, 10, 20 and 40KHz. Kitted by NorCal and others a long time ago. K7QO came

Gang, I uploaded two new videos to @aa7fo on the ADC-40 project.? For the 6 of you following. Will be on hold for three days to allow you to catch up. I have to put up an antenna this afternoon and

I built the Wenzil Techlib.com tester this evening--I used a switch so I only needed one output BNC. It works very well, fast results and easy to use. But since I also have the B&K 530 that has its

Challenge accepted! RP2040 Supermini board $1.79 0.96in OLED display $1.99 Si5351a board $1.39 Free shipping if buying all 3 together Some tax (which may rise quite a bit soon). Total $6 or so. I

IMHO, the way to measure a transistor's ft is not making it oscillate, but to inject RF in its base thru a moderately high resistor and measure the RF component of Ic.Daniel Perez? LW1ECP | | Libre

The images below: -- Terry VK5TM www.vk5tm.com ( https://www.vk5tm.com )

This is a new one for me. I copied a couple of old sources for ft testers but some of them just vanished from the hard drive. One was a real nice PNP/NPN with a VFO and meters. 1960s. You could test

I was doing a couple of videos today on the ADC-40 project. Ran across an envelope with a supply that I bought from Diz <sk> at KitsAndParts back in the day of the 1W and 5W rigs. So, I didn't need to

Correction. The design doesn't have the 2SC3375. You get 6W for -6dB drive.

I use a pair of 2SC5706's in push pull to drive a pair of RD06HHF1 mosfets. These parts work great as drivers for the final. The signal chain in this particular amplifier is: 2SC3375 -> Pair of

Mark, Fake components in a kit.. yes, first time I have heard of this.? I wonder if the PICs could have been plugged into the programmer backwards or something.? I'd ask for at least a partial

The logic goes like this: These Chinese kit suppliers don't care if they destroy the market for a particular item they are selling. They'll just provide a different kit to a different market segment,