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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

Thanks Adam. I'm curious about something (just trying to learn)… Does the value of the capacitor connected to pin 5 of the CD2003 or Toshiba TA2003 affect the behavior of the AGC? ?I ask because

Hi John, Signal generator is my method. Actually I used a TinySA plus a 40dB fixed coaxial attenuator. Set the signal -80dBm or around. Check the spectrum waterfall. AGC makes it less apparent to

Hi Adam, Besides the enjoyment I get from doing the assembly, your kits also ?give me the opportunity to learn more about how receivers, transmitters and their software work. ?I've been studying the

Bill, is this still for sale? My email address is good thur Qrz.com 73 David ac9xh

Thank you, Adam. It’s a minimal container but great for showing the nice circuit board, parts and design of a two transistor rig that does amazing. I have been impressed with its stability. Wayne F.

Wayne, Congratulations! Your container looks great. Thanks, Adam

Guys, I will update the price to add a small shipping charge to compensate the stronger CNY over USD. If you purchase more than 1 pcs of the same model, the shipping charge will not increase. It helps

John, You can use under 10V as long as the suprious suppression is still good if you don't care about the lower RF power. Thanks, Adam 在 2024/10/4 8:54, AA7US via groups.io 写道:

Hello Adam, The documentation for the ADX-S DC Vin says the barrel connector (on the rear) has an acceptable voltage range of 10-12 volts, with 12.6 volts being absolute maximum. ?I presume the upper

My 20 m version of CPK – four is working great. I made my first contact (650 miles) with a good report. I was using a 9 V battery with a 2N2222 as the final (Q2) with my dipole at 10 feet. Wayne F.

Hi Matt, What is the current consumption? If it is around 160 mA, it is not necessary to add the heat sink if you don't key it for a long period of time. Thanks, Adam 在 2024/9/30 21:18,

Hi Adam, I used a simple 9V battery. The output also is a question of the lpf. Maybe I will use a heat sink for the P.A. Transistor as I used for the 13 transistor trx. 73 de Matt

Matt, Thanks for the report. What power supply was used for almost 1 watt output? I would remind it is quite hot if you run at 12V. Actually QSO explains everything. 384km is not bad. It is possible

Hi Adam, today I finished my CPK-4 for 40m. Almost 1 Watt Power Output. I Used an internet KIWI receiver nearby my QTH (about1okm away from my home) to listen to my transmittings of the tiny tx. Also