I also built both the 20 and 40 meter versions and yes the 20 meter version has a lower output probably less then a half watt I was able to work Europe and Africa. The little rig got me started in FT8

I build both the D4D 20 and 40 meter rigs. Both did not work well at all. The 20 meter tx had 200 mw output. Pretty useless in my opinion. The 40 worked a couple times then replaced relay and

Check ur timing, swap modes i.e the earlier or later part of the transmission. Don't forget FT8 is based on timing. There are little software widgets that will update your time on the PC a bit more

Check pskreporter.info to see if your signal is getting out. Conor

I have just built D4D 20m kit.. Receiving well, but just not getting any replies.. Relay clicks ok.. have changed the output transistor. (BD139). and voltages on it on TX are as follows.. B -

Thank you Adam Rong Thank you for providing the link. I am already a member of groups.io so there was no problem to download the circuit's PDF. The PCB is nicely designed one Satish VU2SNK

https://groups.io/g/crkits/files/13%20Transistor%2040m%20FT8%20SSB/13TR40m1WFT8SCH.pdf New progress: https://mp.weixin.qq.com/s/f3HyeZ1u2TRWGPkxBYGVMQ Thanks, Adam

The site provided for information is not accessible from India as due to the COVID crises all China sites are banned for accessing from India. Can any one will download the contents circuit diagram

Also Adam, it would be absolutely fantastic if you could guide us to a manufacturer in China that produce good copies of now defunct transistors. There are many on ebay as you probably know. It would

Adam, snap to a grid of 0.1 mm if you do a pcb. I'm not sure there will be many takers due to the amount of same frequency crystals which are rarer than unobtanium any where else other than China.

https://mp.weixin.qq.com/s/oa-plPIjFTOemXd9DMiTtg Introduce the new design unit by unit in English. Thanks, Adam

Thanks for the update Adam. The HT-1 has been a fantastic little rig. It was my only communication during a bad winter storm when our electricity and phone/internet was out. I'll check in from

Currently the stock is empty. I will let you know know once it is available again. Thanks, Adam

Check out the video for a real QSO with DS2 station. https://mp.weixin.qq.com/s/LsT_6HOdcZIj5bBtD9kOjw The schematic is now in the file section as you may have noticed. It could be a kit but it

You are right! It's past midnight for me and I wasn't paying attention. I have small eyes ... ;-) J3 is the microphone connector and J1 is the headphone connector.

I don’t have plan for a new CW kit in the near future. However, the CRK-10A can be back easily when it is required. Thanks, Adam

Hi Fox, The Q3 is a receiver audio amplifier. Thanks, Adam

We thank you! I don't understand the configuration of transistor Q3. Installation with common emitter ... Can you explain it? Thank you! -- Fox

The following files have been uploaded to the Files area of the crkits@groups.io group. /13 Transistor 40m FT8 SSB/13TR40m1WFT8SCH.pdf By: Adam Rong

Any future kits planned for CW ops? Sent from my Verizon, Samsung Galaxy smartphone