Remember that an attenuator in the aerial line will be effective on TX and RX. On 07/11/2020 12:12, Hans Summers wrote:

I think there are more people taking part in the challenge than may be perceived. I have attempted about half the opportunities with the QRP Challenge ( not good at getting up at 3am). I am aware

Daniel, I was also amazed at how well my 40 meter QCX+ receiver works. It competes with rigs costing several thousand dollars. When I tested it to see if it would receive I was picking up European

I have been using my QCX 40 since spring with great pleasure. Listening to the Sweepstakes mania just now, I was reminded how selective and bombproof it is. Tuning along each signal popped out clean

I looked at it and tried on both sides of R3 but no luck.

It's only a simple two-sided board. You can add jumper wires to the FET as needed according to the schematic diagram in the manual.

By coincidence I was reading a copy of Short Wave Magazine from 1939 - the last edition before WWII. It gives the result of a QRP competition (OK, "test"). It's the most delightful of articles

I have been having problems getting my progrock to talk to the Si5351 board and I’ve narrowed down the problem to having lifted the pad for pin 14 which is one of the data lines. Is there any way to

Shane, Thank you so much for the offers of help you provided! I found that almost all the pins on the RF chip are shorted to the ground plane, so I'm now very suspect of the viability of the board.

I have a QCX 20. 4 watts out. Added a small heat sink to 7805. Has T1.00 installed. I will include a new T1.05. 65 bucks shipped, PayPal OK CONUS only

I have a QCX 20. 4 watts out. Added a small heat sink to 7805. Has T1.00 installed. I will include a new T1.05. 65 bucks shipped, PayPal OK

See page 7 of the attached Shack Clock operations manual downloaded from QRP Labs. (This is different than the assembly manual.) There are two calibration settings in the clock menu for 0C and

Reg, Amen. 73, Shane KE7TR

Ed, Hang in there buddy. Getting to know a technology radically different from Syperherterodine can be frustrating, as well as full of mystery, but it is possible. As Hans layer out, it really is as

thank you all i'm going to work -- Claude QCX france

I recently added one TMP-36 temperature sensor to my clock, though it usually shows temperatures 6°C higher than the real one compared to other thermometers. Is there any way to adjust it so that it

https://www.rfcafe.com/references/electrical/attenuators.htm

Claude, here is a link to a youtube 10db attenuator. https://youtu.be/uMYaOATGpbc Jim...kq3s

would you have a diagram -- Claude QCX france

Hi Claude Attenuators! At 200mW there won't be any trouble with power dissipation etc. It should be easy to build suitable pi-network attenuators for 3dB, 6dB, 10dB whatever... and pop it between the