Thanks to all who responded to my request on 4 line display .

Nevermind, it's now stopped booting altogether. I've first tried Hans' recommended fix (moving L5) but that didn't work, then snapped one leg of L5 without having a spare one. After much cursing I

Allison, I assumed by reading the IFR510 specs. that I should add about 85 ma. I re-performed the adjautment last night with about the same results. That got me thinking. I have the qcx

I used this and works great. https://www.amazon.com/gp/product/B00GZ6GK7A/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Andrea, But I was thinking if the radio was 30dB down then 30dB lower tones might be noticed. But I have never tried.. Some form of signal tracing might help, a scope or diode probe. I think

They definitely are. True, but there are many stages after that HI! I’d say the core of the receiver, the many op-amps, etc. Lots and lots of components and solder joints… The alignment tone is

Many thousands sold per year ... just wait until the QSX hits the street ... the total number of views for the QSX page is now over 1.1 MILLION!!! OK, that's not views by unique visitors, and half of

Andrea, I would not think that C17 would do that but maybe I'm wrong. Are they really as strong as described in the manual? The tone signal is fed into the input of the LPF, there is not much between

That’s true Alan, I’m not even trying to draw conclusions based on a sound statistical basis. However, I found it interesting that Vern found exactly the same faulty component on two QCXs and I

Ron, Jim: Terry King has a bunch of Arduino-related stuff as well as displays: LCD DISPLAY LCD DISPLAY LCD DISPLAY While not the cheapest, he has lots of info about what he sells and sample code you

A tuner like this one will act as a band pass filter. https://steadynet.com/emtech/ Ed AB8DF

One could ask why no-one else has reported that problem? I wonder what would happen if it were faulty, open or short circuit, what would be the symptoms? I'm not an expert but I think either way all

I agree, however Vern wrote he had to replace C17 in both his faulty QCXs… it could be a coincidence, but what are the odds of that? Yep, I’m reflowing a few pins at a time, but I still haven’t

The ATU comes in various designs. L-C-L or C-L-C and they either act as a low pass filter (when the C go to ground) or a high pass filter (when the L go to ground) but never as a narrow BPF But your

Hi JP Typically at the higher frequency end, preamplifiers start becoming necessary/desirable. I don't think this is related to switching out the BPF. I don't have any specific recommendations at this

What do you want to do ?New mailCopy hi all thanks to everybody for their comments. at present my only antenna is a mono band dipole on 20 mtrs but i am thinking of putting up a g5rv with a manually

Hans, Thanks again for your contributions. I have the parts to assemble a 10 or 11 band relay boards to switch out the BPFs and LPFs that are appropriate for the band selected. One of the comments on

Hi Hans, My furthest contacts from my location in DN13 on 20m using the 50w amp are Japan and France (so far). But I’ve only been trying since 2-Jan so I can only imagine the possibilities.

Hi Gregg Thanks! I have added the photos see http://www.qrp-labs.com/50wpa.html 50W does make a big difference though QRP is still a fascination and a challenge in its own right. With the 50W Amp I

Hi Hans, Yes, of course, my pleasure. Thanks for the 50w kit design, it’s working great for me. I have a very mediocre dipole on 20m and the extra 50w boost during this low sunspot cycle is getting