Hi, Dave. I had to replace fst3253 here. Technique I used is to desolder pins and lift one at a time down one side of ic. Then I flood other side of ic with solder and lift ic gently to remove. I

Hi Bob There's already an image of the tracks on page 5 of the operating manual. 73 Hans G0UPL http://qrp-labs.com

Hi Phil If you cut off the recommended pin for the situation where using the Si5351A Synth in an old U3 Board, then it would be no problem. If you cut off a different pin then it could be your

Hans, I am using the Si5351A and I believe that I cut off one pin. Would that be my problem? Phil PS The 3S software (3.12a) seems to be a lot faster, that is why I

Oooops Thanks Bill, for bringing this oversight to my attention. Too fast on the copy-and-paste. I have fixed it now see http://qrp-labs.com/qlg1 73 Hans G0UPL http://qrp-labs.com

Hi Bob I'm using Heil Sound Pro-set 3 https://heilsound.com/products/pro-set-3/ for the last year or so, which was a Homebrew Heroes award 2019 sponsor prize. I find them sensitive and comfortable and

Hi Phil No. V3.09f was the last firmware version that supported both the AD9850 DDS and the Si5351A synthesizer chip. After that, AD9850 DDS code was removed from the firmware to make space for other

Hi Dave You can connect to tip or ring, either is OK. If using a mono CW plug you can configure in the firmware so that either tip, ring or both are chosen as straight key input; this is because a

Dear Members, I have to replace IC4 FST3253 on my QCX+. I killed it by accident and so I am on the hook to replace it. I have a repair part and looking for a technique that someone has used

Mine is wired with tip as "on" and barrel to screen. Works OK on QCX & other rigs here. Mike

Am I correct if I wire my straight key with the sleeve as ground, and the ring as the 'on' state, and ignore the tip? Dave KK7SS

Hi Hans, None of the links Lars-Erik included in his guide carried over to your QLG1 page. - Bill N3AJ

All, I have a Ultimate 3 currently running firmware 3.09f. I'm using the Si5351A Synthesiser module. Can I up grade to the latest firmware 3.12a ? 73 Phil N6WKZ

Hans answered this in this post. https://groups.io/g/QRPLabs/topic/78013491#55111 Ron

The rig has been sold. Thanks all. 73, Bill NZ0T

Messing with the turns on L3 didn't seem to make a difference so I focused my attention to the final output transistors. I found a solder bridge between gate and source on Q3 and cleared it. Still no

Bob, I have used my Bose Quiet Comfort noise cancelling (over the ears) headphones for all my rigs and find they work very well for my old ears. Have two sets, newer ones and a 20 year older set.

BTW- there are also differences in capacitors between the bands. Don't overlook the possibility of wrong or missing components at the various positions with different comments by band. Consult the

I, too, will miss having the GPS status screen. I suspect the reason it was removed was to provide more memory for new, higher-value functions. 73, Shane KE7TR

Bob, I have a 40m version QCX+, but the circuitry is the same as the QCX, and the only variation between the bands is the number of windings on the torroids. If you have low audio on receive, and low