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It seems to be constant, regardless of band. I haven't had time to do much other investigation, but I do remember that was the case. /m

Thank you community of builders! I bought "new" soldering supplies (63/37 solder paste and No Clean flux paste both in syringes) to teach myself to solder surface mount devices-- it, and I, did well

BTW, I have used (and hate) no clean flux solder. ?The only thing I found that would take it off was acetone and even with that it took a while/some scrubbing.

Here’s a pic of one of my boards.

I’ve been using water-based flux cored solder (and same in a flux pen) for many years now. ?After assembly, I wash my boards with water, a bit of dishwashing detergent and an old toothbrush.

Thank you for this information Barb! I also have been looking for a smaller display. I have not made the QMX but see that it has a HD44780-compatible LCD display. I built the DDS Synth VFO and it

Maybe on the ground to the radio? Do you use an external tuner? If so then you can ground there. Fortunately USB-C cables are made for high-speed connectivity so they have better braid-shielding over

Some days ago someone posted a Google link to Kester’s no clean solder. Reading that document I learned that their flux was unaffected by IPA, even 99%. So I agree with others that good old rosin

Dear Tisha, I have some of those capacitors and I can mail them to you FREE. Just need to know if your address is good on QRZ.com Take care and have fun 73 Dave WA5DJJ SUPER GRABBER -

although I think I'm an experienced builder it may be that I'm missing something. Having gone through all the checks and replaced or re-did components as recommended I still have no image

Robert, For board cleaning I am using Isopropyl alcohol brushing the board with a tooth brush. The solder I use is Kester no clean 63/37 and the flux can be easily removed. No harm done to the board

A switcher at 95% efficiency would waste 12W x 0.05=0.6W vs 1.8W with diodes.? So 1/3 the loss. 73, Don N2VGU

Fix the problem at the source, get rid of that no-clean fluxed solder and get a roll of 63/37 with RMA flux from Kester or Multicore and clean it off with ordinary isopropanol and a cut-down acid

Hello since a few days I have a QMX+. All is fine and I love this addition to my QMX(80-20). From time to time I am notice a black line moving from left to right beyond the frequency display. Morse

Hello Yoon, yes you are correct with your assumption.Its planed a HT like the KH1 with battery, speaker and perhabs automatic tuner inside. On the other side,since the last weeks, i'm trying a

And if you have a 1:1 SWR match to your vertical, what are you using the tuner for? With the setup I described, I use 20 feet of coax, so that's my approx distance from me to the antenna. -- 73 de

I had run into a similar situation. And this solved it: Amazon.com: Digirig Shielded Short USB-A to USB-C Cable with Ferrites : Electronics I so use

If you use a linear regulator, then you're correct-- It generates heat and will "waste" power... The buck/boost regulators are all switchers, which will (nominally) waste /less/ power. Consider, if

Hi All It is very interesting to see so many recommendations for IPA etc. I have tried this on a kit I built and it attacked the green coating on the rear of the board. John G0UBE

The only reason I can think of for doing this, if I were to do it, is to turn the QMX into an HT. What's your plan? 73, Yoon KM6KJI