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Yes, only 1 tx. You could put a buzzer in the tx that is actuated by the key as a sidetone if you really want one. Or blow air with your mouth or just learn to send without a sidetone. Peter

Ron, The bead is 600 ohm at 100MHz. The PCB is not open so you can design your own. Thanks, Adam

I just received my kit today. I also ordered off the internet a couple of the KT0936MB9 IC's to build the radio from scratch. I'm stuck on the ferrite bead. I understand what it does as I have built

Guys, No shipping during this period. Please share the kit building progress with us, either photo or video will do. Thanks, Adam

Thanks for the demostration video, Peter. I suppose you use one TX instead of two, so you cannot hear side tone while in TX. Thanks, Adam 在 2024/9/27 21:16, Peter Parker via groups.io 写道:

I can vouch this approach works well provided the band isn't crowded. Demonstrated here: https://www.youtube.com/watch?v=GGBvJZx69uI

Inspired by this idea, I just submitted a short piece for QRP Quarterly. Thanks, Adam

Guys, CPK-4 can work with a SSB receiver to make a complete station. If you just have an AM radio receiver, you can consider 2 CPK-4. Photo: https://crkits.com/cpk4.jpg Take 7030 kHz as an example,

Adam!? Thank you!? The little kid in me was desperately looking for a public web-888 to play with when I am awaiting shipment! Had I actually fully read your message I would have seen that! Fred

Yeah, sorry Adam.? My CRKits money for the next couple of months went to ordering one of these.? The Tech Minds has a very good video on this device on YouTube. I have a remote location that I want

BA6QH just published a video of a complete QSO: https://youtu.be/oy_Wb3gU-EA?si=1MCE3qhPmyaDD0Aj Thanks, Adam 在 2024/9/16 8:34, mstangelo@... 写道:

Hi Timothy, Just spent the Mid-Autumn festival or moon cake festival. A special one as a strong Typhoon hit Shanghai directly. Apparently you understood the content very well. I invited all the

Mighty? Mike CW? ?Tx? design is attached.? ?With an RD16HH? RF mosfet as the PA? ?I'd expect? 9-10 W out minimum esp if run at? 15V.? It needs to be frequency mobile and it needs a keyer?

Adam? I saw the post and translated it as I need a nother? six months for full fluency in Mandarin. I'm sure the? travel costs in the local? Shanghai Metro are very low? but unfortunately the?

I have a Tecsun PL-368 and it is a great compact receiver for CW and SSB reception. The tecsun plus the CPK-4 make a fine combination. I wish I have miniture equipment when I started doing portable

And a short field demo video by BA6QH/QRP. I think his receiver is a Tecsun PL-368. I suppose it is the first QSO by CPK-4. He mentioned many years ago his first TX was a similar one with bigger

Guys, You can visit my shack and let's do some CPK kit building together. See this post: https://mp.weixin./s/uRZCcKSIWmaPZzf35C-h5g Thanks, Adam

The guys just announced a web based high performance SDR receiver called Web-888. You can visit this page to try the performance: WEB-888 @ K1RA/KW4VA ( http://web-888.k1ra.us:8075/ ) And, this is the

Just updated the tracking information. I guess some people still haven't watched my CPK-4 kit build video: CPK-4 QRPP CW TX Build (youtube.com) <https://www.youtube.com/watch?v=v5zwn0TTpGk> Thanks,

Guys, Just shipped all the CPK-4 backlog orders. Will update tracking numbers in PayPal or via email if you pay as family or friend. Thanks, Adam