I bought a KN850 and it has serious problems I can not fix. I figured one day I would find the right ham electrical engineer that would want to play with it... document it.. and fix it.

Adam, Great video, superior than a detailed paper instruction. Any beginner can made by himself. Dozen of builders are making this simple receiver in Japan. Easier than the MRX-40, QST magazine

Thanks Rob, you probably just save me $. Seller refused my offer of $300 for KN990 which what I deem it to be worth. Ken ke4rg

Rob, If your problem is a common problem, the designer might have some clues. Thanks, Adam 在 2018年12月24日，上午1:23，Rob via Groups.Io <roomberg@...> 写道：

Ken, The domestic price is higher than 300 bucks. The eBay seller cannot have lower price than that. Thanks, Adam 在 2018年12月24日，下午10:43，Ken Talbott <ktalbott@...> 写道：

Gang, Merry Christmas! I visited Windcamp studio last weekend. The owner makes nice looking antennas and battery packs as well as accessories for FT817/818 and KX3. His studio is much bigger than

What value are the two caps at pins 6 & 7? Jim WB4ILP

Jim, It depends on the load capacitor of the crystal and the mode. The normal load cap is 20 pF, and if you want to receive SSB, you will need to pick two caps to oscillate on the exact marked

Thanks Adam and Merry Christmas ! Jim

Gang, I built this transceiver last weekend. It is a VOX controlled simple DSB transceiver for 14.074 MHz using crystal. It puts 500 mW and the QSO test with my TS-590S seems promising. See the

Very nicely done Adam! 👍🏼 There's nothing more satisfying than completing QSO's using a transceiver you built. Especially so for one built from scratch. 73, John AA7US

Gang, The VOX circuit is very simple one like this: https://www.electroschematics.com/354/vox-circuit-schematic/ I changed 47k to 10k to shorten the hold time. Here is how I modified my radio

Gang, I followed VK3YE micro 40 and added a VOX circuit and here is the result: Thanks, Adam

Folks, I managed the first QSO with this 1-watt DSB FT8 rig on 20m with a ham about 1168 miles away. The short term frequency stability is still an area for improvement due to final stage heating the

I built it on my perf board. I made the first QSO days ago with a ham 1168 miles away. It is a 20m DSB 1-watt transceiver with VOX.

https://the-tech-examiner.com/2019/02/11/ht-1a-dual-band-cw-qrp-transceiver/ Thanks, Adam

Lots of fun building and operating this simple FT8 rig by manually switching RX/TX. And here is the schematic. Thanks, Adam

https://www.youtube.com/watch?v=kw7xRyf8LDY -- Thanks, Adam Rong

Folks, JL1KRA made a dedicated page for the simple receiver I introduced earlier. The design is quite unique but the performance is acceptable regarding selectivity and sensitivity. You can give it a

Folks, Thanks for encouragement from many hams. I have decided to make it a kit to include more features including: 1. VOX control 2. Better spectrum purity 3. Better frequency stability 4. A metal