Folks, The D4D: DSB transceiver for Digital is out of stock. The order comes in every month but I have to keep my stock as low as possible to facilitate a move in Spring this year. When it gets warmer

How do I download D4D 20 manual and parts list? Thanks Larry

Hello Adam / Group I am having some building challenges. I am keeping track of all parts of the various manuals as per the instructions. I am building a CS-40V (“USA” 40M) SSB _without_ the “sandwich”

I want to run JTDX on a raspberry pi 4. What software would you recommend for audio interfacing. Any other tips and recommendations welcome. Need the thing up and running before Thursday.

Guys, Thanks to JL1KRA who brought up the idea and provided the English manual. I made it with my Choc perfboard. The output is 1 watt at 12V power supply and it worked great. See the video of the fir

Folks, Recently I modified Pixie and founds something interesting. Here is my schematic and the articles in Chinese. https://mp.weixin.qq.com/s/9WmZpzL8BClo2Q1xnlz4_Q https://mp.weixin.qq.com/s/SGIxWM

My HT-1A is only putting out about 2.5W. Originally it put out nearly 5W. Any suggestions of where to start troubleshooting? Thanks 73 Howard K4LXY

All, Due to the exchange rate of USD to RMB, I have to adjust the EMS shipping cost from 20 USD to 22 USD to compensate my loss. Meanwhile, the cheaper shipping will be increased a bit as well. Thanks

Folks, This video shows my MX-21S and its companion keyer and a holder made by JL1KRA. Thanks to JL1KRA! https://mp.weixin.qq.com/s/9NL4BP1RrUQED4fB70nSfw Thanks, Adam

Guys, I picked up a bail for my HT-1A. It works great with the little rig. https://www.ebay.com/itm/Special-folder-Holder-Stand-for-xiegu-G1M-X1M-SDR-HF-transceiver-ham-radio/174445417920?ssPageName=S

Folks, Someone asked me if we can connect HT-1A to QRP Labs 50W PA. I have consuled with the designer and he said we can use MUTE line (pin 3) instead of KEY line (pin 4) in J1 (the connector to conne

Folks, Please check it out. Let me know what you think. https://youtu.be/wbW91dbTgxA Thanks, Adam

Folks, While I am still waiting for the Autumn 2020 issue of Sprat, JL1KRA sent me the cover page with my Little Choc Receiver photo. I wrote in the beginning, Hello world! I am the one who first intr

Folks, This is the national day and mid autumn festival here in China. We spent some great time with fellow hams in Shanghai at Lake Dianshanhu. The $10 EFHW antenna performs very well with KX3. We ha

Welcome new subscribers. Here I am writing a series of SSB transceiver building techniques. It is still on going. https://mp.weixin.qq.com/s/e-Gc8syfG_5e6zVsp_svkQ https://mp.weixin.qq.com/s/3IaOFsM2U

The following files have been uploaded to the Files area of the crkits@groups.io group. /CS-xxV Documents/Pitfalls of Building CSxxV.pdf By: Adam Rong Description: Here I list the pitfalls of building

Adam has discontinued selling the original Sandwich. I have found that there is still a small demand for the product. I am now introducing the "Sandwich 2". It is still a Digital VFO but is now on a s

The following files have been updated in the Files area of the crkits@groups.io group. //SDR-40a Documents/SDR-40a user manual.pdf By: Adam Rong Description: In case someone is interested in this tiny

The following files have been uploaded to the Files area of the crkits@groups.io group. /SDR-40a Documents/SDR-40a user manual.pdf By: Adam Rong Description: In case someone is interested in this tiny

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the crkits@groups.io group. /R3500D Documents/R3500DYOTAAssemblyManualPurdu