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Guys, I have decided to reduce SKU to focus on key kit products. I have 6 13TR kits (1 is ready, 5 to prepare) left before EOL. You will enjoy the classic circuit based on the design of VK3YE's

Put a 50ohm dummy load and measure the voltage across it while transmitting , then use the formula for power using the 50 ohms and the measured voltage ( P= V^2/R) 73 W4NRI - Noel [email protected]>

I have made several contacts with my 20 m cpk-4 transmitter. I will spend more time and plan to make some great contacts. 9 volts and dipole Wayne F. Steury, N9EGT western Colorado

Hi Adam, Great! 0,4W and 955km range ? 73, Anton

Hi Anton, 0.4 watt is very normal if you power with 9V. Thanks, Adam

Hi Berrie, When I looked at that diagram, I suddenly realized that you can measure on a dummy load. And as it happens, this exact function is described for the dummy load from QRP Labs that I have

Hi Anton, There is a good description of building a QRP power meter by Vk3ye on the internet, if you search for "Vk3ye qrp power meter". I measured it attaching an oscilloscope to the dummyload for

I build the CPK-4. It works very good! Not too chirpy. While adjusting the frequency I blew the 100uH inductor. Today I received some spares and fixed the transmitter. Does anyone know how to measure

Hi Matt, Thanks for sharing. Hope you enjoy the kit. Thanks, Adam

Unfortunately I will get QQ first time next January. So I can't read your report, Adam.

I was able to have some QSOs on 40m and 30m. Rx was a Kiwi rx, 20km away from my qth. Stations, about 600km away from DL and Italy. ?

Hello friends! I finished it myself. The plate is functional but needs to be adjusted. I have the necessary devices, I just lack the time... If someone still has them under construction, maybe we can

Hi Adam, Did you ever finish the assembly of this?? How did it turn out? Cheers and 73, Mark

Gary, Thanks for your support. I haven't seen my published article yet. I am not a subscriber to QQ. Thanks, Adam 在 2024/10/25 3:35, Gary Freeman via groups.io 写道:

Adam Thanks for your article, It helped to clarify a few things I wasn't clear on. I appreciate all your great radios. 72 de Gary W0ITT Sent from Outlook<http://aka.ms/weboutlook>

Guys, If you still read QRP Quarterly, you will find my short piece about CPK-4 QRP Transmitter Kit. Thanks, Adam

Guys, Normally the tracking number is updated in PayPal. If you cannot find the tracking info, especially for recent orders, please let me know so I will check if you have a new tracking number

Gang, QRPBuilder is announcing two new paddles. They are an iambic and single lever design similar to our other paddles, but are attached to your project by neodymium magnets, and can be moved from

That explains things quite well. Thank you Adam. John L. AA7US

John, Here is a write up in Chinese: https://mp.weixin./s/7Cr9eTz7AuQoXM-vtkcGww Thanks, Adam