From some older posts to the group I find this: The capacitors are 50V NP0 MLCC from Digikey, made by Vishay ... Ron

What ceramic capacitors should I order for use in QCX transceivers? I have some 25 and 50 volt NPO from digikey, but they are not ok voltage wise for the LPF for example at 5 watts I think. Thanks in

I’ve ordered from Tayda over the past Many years and I feel their Components are top shelf. My junk box is stocked with their parts and I have never had a bad part. Tolerance on resistors and

Not a problem Hans. My QLG2 will be used to set the PC clock. The added display was a bonus and I just won't put it next to the QRP-Labs clock - hi! -- 73, Rick VE7TK Website: http://www.ve7tk.com

Glad it worked Sean. 73 .. Ron

Eureka! Thank you. I moved the cap from the place I had it to where you showed me, and I get a normal sidetone now with the earbuds. Thanks again! Sean KN4ZMA

Here's a photo of the capacitor in place... Ron

Sean, try adding a capacitor across the headphone connector on the bottom of the board. A 100nF should suffice. Install it from the audio out lead to ground on the bottom of the audio jack. I use 1206

Well that might do it, Alan. Pretty sure the earbuds I'm trying have a lower impedance. They're common phone ones, but at least the first one is probably closer to 17 based on current models from the

Sean, Not sure if this has been mentioned but are there some comments about speaker impedance in the manual? 73 Alan G4ZFQ

First set of earbuds had a mic, so it was TRRS. Second set was just a regular stereo TRS connector. Sennheisers are TRS. Can't tell if it's shielded or not. Tried my son's pair of cheap over the ear

The fact that the Sennheiser headset works satisfactorily is encouraging. I'd look into how it is wired (shielded cable?). I assume the jack is of the 3 terminal type in all cases? Glory to God in

Lou: I have used Tayda several times and found them to be both reliable and relatively inexpensive. I believe they have a US distribution warehouse in the US, so they usually deliver commonly-ordered

Tried two sets of earbuds. Even wrapped them in a toroid so much that there wasn't more than a couple of inches on either side. Still the same problem. Argh. Sean KN4ZMA

Hi Lou AR, KN and SK/VA (you choose, in a configuration) was all added in 1.06 on 30-Oct-2020. You can see the firmware version changes here http://qrp-labs.com/qcxp/qcxpfirmware.html No

my unit with black bolts

Hi Hans, That's all good, was just pulling your leg of course. But I did not know about the space being full, so well done fitting it all in. You did not mention <AR> so IF that is not in there and IF

Hi Lou Not sure it even made it into that list Lou... not for QCX anyway. Code space is at rather a premium in QCX and something else would get dropped... some of these I think have merit, but many of

Welcome Guido! Hehehe you really want MORE?! I'm picturing Hans putting this to the bottom of his "in the next life list" :-) Actually just the first couple would be a good start = instead of | and +

Very clever idea Hans! I have ordered one for one of my U3s units. 73 Roger G4IUP