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Adam, Thanks for your helpful, informative responses. So it sounds like the 40 meter version may be significantly more stable than the 20 meter version because of the lower frequency crystal.? In

Do you have a link to your paypal?

Patrick, The beautiful black metal case is included in the price! Thanks, Adam

Hello Adam Very interesting! Sorry if you still talk about it,? is there the case I have seen in the pics section? 73 Patrick F6GWE

Folks, I start to take email order now. The introductory price is 39 USD for kit including shipping to worldwide. As in the introductory period, you will get audio cable options for free. The earliest

Ron, SNR is 5-10 dB worse. However, I found that I only can make QSO with radios of -15dB SNR or better, so I think this is not a problem. Same as QRP communication, you have bigger chance to QSO with

Adam, Thanks much for your responses. When making comparisons with a big rig, how much worse was the received SNR report?? With the little rig, would you say it was 5 dB, 10 dB, or 15 dB worse??

Ron, Thanks for the questions. 1. The PCB size is around 100x64. 2. The heating resistor is recommended for 14MHz. It is really a balance between short term and long term but I see overall

Adam, Glad to hear about your progress.? Just a few questions. - What are the dimensions of the PCB (or case)? - Do you recommend using the heating resistor especially on the 20 meter version?? Was

Folks, I have decided on all the key parts, and purchased most of them. The relay reliability is very important, so I have chosen Zettler, the same brand used in Elecraft K2 kit I have purchased

Judging from the schematic, I don't see big problem. Thanks, Adam

I would like to use LiPo battery with R3500. I suppose I have to use 2S cells which means maximum voltage could be 8.4V. Is that to much for this rig?

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* d4dpartlist20190504.xls *Uploaded By:* Adam Rong

Folks, I just realized that FT8 is so popular that someone loves it and someone hates it. However I hope in here both digital and analog kits can coexist. D4D actually is an all analog transceiver

Folks, Well, it was leaked by qrper.com. Check it out for now, although some data might be modified later. Thanks, Adam

In case you are following this thread, please see this: /g/crkits/topic/31005901#2560 Now the idea comes true. Thanks, Adam

Folks, I have put together a final version and it worked perfectly. Now I accept order for beta testing. ?I will ship 3 kits of 7074 by May 6. If you join beta testing, you will need to keep secret

Folks, This is a bit history for D4D: A simple QRP transceiver kit for FT8. D4D stands for DSB transceiver for Digital modes. It is a Double Sided Band transceiver kit designed for digital modes,

Ron, I use 14.070MHz HC-49U crystals and pull them high about 4kHz. The crystals were customized before and I have enough stock. They work perfectly for 14.074MHz. Thanks, Adam

Adam, Glad to see that you're going forward with 20 meter version sooner rather than later.? Are you getting customized crystals for 14.074 Mhz or is it anothet frequency crystal that has to be