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I'm guessing that a MOSFET solid state relay will be the way to go. ?The DC line to the transmit LED provides a little over 4v. ?I've not used MOSFET relays before but I plan to experiment with one.

A reed relay is very responsive so it should work, though I'd really like to get rid of the relay. ?Maybe my next project. ?Be sure to put a reverse diode across the relay to prevent damage. The amp

Folks, Recently I focus on supply chain and manufacturing in my professional work, and I visited 10 OEM factories in the past two weeks. In my piece, I wrote that it might be good training material to

Thanks for sharing this, Howard. By controlling by a relay, is it still okay if you send really fast? Thanks, Adam

The QRP-Labs 50W amplifier makes a great (and inexpensive) single-band amp for the HT-1A. https://www.qrp-labs.com/50wpa.html To key the amp, a 5v keying line is needed from the HT-1. ?On the HT-1

Folks, 1000 members for the first time. During the lockdown period, let's build something. Thanks, Adam

The tracking at http://www.ems.com.cn/english.html says it departed Shanghai on March 20. My shipping agent told me a week ago that we should expect more than one month for France. The COVID-19

Hello Adam I have not receive my D4D for JS8. 73 Gilles F1BFU

If you feel weird to turn Gain pot in reversed direction, you can de-solder the gain pot and turn 180 degree and use jumper wires to connect like III I am looking forward to your progress of the

Hi Adam, Thank you for your kind reply. Relay seems to be good. Will try during the afternoon the other two tips. 73 de Pedro, LU7DID

Hi Dr. Pedro, Please measure relay contacts with ohm meter. Also, please short the crystal in front end with a 103 or 104 cap to see if it improves. Also please check the contact of the audio out jack

Hello, I've been using the D4D as part of my FT8/WSPR beacon and monitoring station for several months now, very good performance I must say. However, recently, it stopped working. It was not able to

Adam and All, Yes, I wrote the HT-1A article to Japanese CQ magazine. The reputation of this small gem rapidly spread in nation wide and this is faster than the damned virus. My preparation stock in

Folks, Japan CQ magazine just published an article about HT-1A CW Transceiver Kit and it brought many more orders than expected. Perhaps home brewing is one of the best choices while home staying due

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. * /D4D Kit Documentations/D4D.pdf (

Ok Adam, we will remember that when they need some milk powder and timber ? Nigel

Not a trade agreement issue. It’s due to COV. Thanks, Adam

Don't know why they can't ship to AU and NZ, we both have trade agreements with China. What a shame. Nigel

Folks, A regular air parcel to USA east coast will take 3-4 weeks now, but normally it is 10-14 days. Even for express shipping like EMS or FedEx, it is longer than expected. For example, an EMS

David, For now, the slower shipping is not a good option. Thanks, Adam