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Oh thank you so much. I was wondering what else to check. My problems are now confounded after reflowing solder joints and now only getting error si5351a. I am so frustrated.

Hi Brian The physical specification of the 470uF capacitor in the subsequent batches of kits is 6mm diameter, 7mm height. 73 Hans G0UPL http://qrp-labs.com george.familyuk@...>

Hi all There's a new video published today by Kevin KB9RLW reviewing and demonstrating the QCX. There are now several videos about the QCX, and to make it easy to find and watch them I have put them

This is a trivial question but the answer would be useful. Message #17075 advises that electrolytic capacitor C47 should be mounted horizontally in the first batch of QCX kits as it is slightly too

Thanks Greg I have started a new web page http://qrp-labs.com/qcx/qcxgallery.html for builders' photos, to give people ideas about how to enclose their QCX radios. 73 Hans

Hi Michael I assume you have built your clock using a 4-line display, not the supplied 2-line display? To alternate between different displays on a line, you should enter the text for the line with

Oho!!!! I installed it back the front!!! It protrudes much off the board when installed correctly. You cannot poke wires in the back of it LOL Thanks folks!

Hopefully the metal inside hasn’t been damaged. When I inserted the wires, I just poked them in until they stopped and then tightened the screws. It’s a compression fit. Is the block installed

HI, thanks Mike and Marc, but even with screws fully loosened, nothing gives way. The silver metal inside does not move, even when pushed down or in with a toothpick, screw driver, test lead end...

Hi Just loosen the screws on top Them poke the wires into the side. It may not feel like the wires are in, but tighten the screws on just tug on the wires very gently. If there in, you’ll feel

It's not a silly question at all. Phoenix or Phoenix like contact blocks sometimes stick. As you are turning the screw to the left (looking down from the top), watch the 1/8"- ish (about 1mm) thick

Sorry for this silly question, but with poor eyesight and even with magnifying glass, I cannot figure out how to power up my completed QCX! The green DC connector has 2 screws on the top, loosening

Hi Ken This rotary encoder doesn't correspond to one from Mouser, Digikey etc. Which dimensions do you need? It would be best for me (or someone else) to just measure one. 73 Hans

I suggest you check continuity of the surrounding circuitry to each of the BS170's legs and not just at their pads. That would be Common/Ground to Source, C1 and R6 to Gate and T1 to Drain. I'm just

Hi Simon So you checked for continuity from each of the LCD pins to the IC2 pins that they should be connected to. Have you also checked the voltages at the LCD pins, and do they correspond to what

Thanks Phil FYI ICQ published the interview as a video now: https://www.youtube.com/watch?v=OJZvYsyWzYw The video does not show the sun-tan on the left side of my head. The guy on the table to my

Hi Justin, I just cut the necessary tracks on the underside of the pcb and added link wires. I did this with the divider chip in situ. 73 Ken G4APB

Lou, Not through the 200hz filter. ?I took the output from after the first opamp where the signals are still quadrature. ?The I signal goes to one ear and the Q signal goes to the other ear. ?The

Simon did you hear the SSB in just 200 Hz filter of QCX or you have a mod for broader filter? I thought QCX can't listen to SSB in its standard form. Thanks for very interesting and helpful post, the

Thanks for the comments, I'm glad the post was helpful. Fortunately, even here in the police state of South Australia driving while Morse-ing is still legal, as is holding a microphone. Using a mobile