开云体育

Torsten, RF getting into the USB cable? Try different cables, put chokes on cables. Or stop common-mode signals on the feeder. Reconfigure antenna. 72 Alan G4ZFQ

It's an easy mod. You just move the 7805 over to the left one pin and solder the left most pin to the bottom of the diode. -- 73, Dan - W2DLC

Tnx all.? Not that I *plan* on shorting the 5VDC to ground, but replacing the regulator with a 78M05 is appealing.? Where will I find details on that fix?? Is it drop-in, or does it require some

*Hans* - It looks like we have a real problem for many (most?) of us! Perhaps it is a bigger issue than we all realised. I welcome your comments please, meanwhile, back in the desk drawer it goes as,

Hello there :) I built a QDX (PCB Rev 5 and firmware 1_10) for 20, 17, 15, 12, 11 and 10m (12 volts version) that works well (rx & tx) on 15m, but fails running on 10m. The QDX is connected to a

BTW Martin, I had a really good laugh at your Ship of Theseus reference. Clever! Let's hope that changing out that Stereo ADC will be the last of it. Looking forward to seeing your All OK

Got my QMX on Monday March 10th. Did 2 QSO's 20m. CQ'ing again on tuesday - no rx at all. Transmit is fine to me. 1 - board revision: Rev3 so Hans told me - got it assembled from QRP-Labs and do not

I think the thumps are coming from the AGC and you disabled it. increasing sidetone volume to 60 also somehow helps. Simon

I only just started to test my QMX with a paddle a few days ago.? Initially I experienced the severe sidetone clicks that have been reported with the latest and previous version of firmware.? I made

Hi Greg, I bought an unbuilt kit of the same vintage recently. It requires a capacitor on the power input to prevent potential damage from supply spiking. D33 cathode to 0V. 10uF tantalum or

Hello Emory, 12, 11, and 10 meters share the same low pass filter (LPF).? This would point to a problem there.? The most common is one of the toroid connections did not burn through the enamel.?

Just a note that this issue of? some of Granberg's pronouncements and inconsistencies is still being looked at. 1.? John Z's comment about? Adsl? Line drivers applies to some? Texas chips . I

New QMX build with no output on 12 and 10 meters?? Below measured on QRP watt meter and dummy load. 20 - 4.5 watts 17 - 4 15 - 2.5 12 - 0 11 - 0 10 - 0 Checked and re-checked, did not find any solder

My QMX running .017 is also very unpleasant to use on CW due to the thumps. No amount of massaging of the settings has made it any more pleasant to use. I’m hoping one day that the solution will be

Gang, We have added two bare boards for use with our PTO. While I was working on designing the PTO, I used the Norcal Tin Ear circuit for the testing. I have some of these 40m receiver boards

It’s on the QCX Mini page on QRPLabs website. Use instructions for Rev1&2 but not the addenda for Rev2. The instructions to add a 10 uf tantulum or electrolytic capacitor to the voltage regulator

Forgot to mention - both radios built for 12 v operation. I’ve been using them at about 11.8 volts. Jim / K7TXA Eagle, ID SKCC 10447T BUG 301

Hello again Jeff and the group. Got Terminal mode 'smart' earlier today and ran LPF sweeps.? Saved the graphs. Then tweaked the windings, one toroid at a time for the LPF 1 pair, which are for 17 and

Interesting discussion. To wit: Part 1: - Well like ALL of the responses so far, I also am affected with clicks that are there no matter what combinations of settings I use, with some settings worse

Right! I was thinking WSPR. That's not bad 2-way JA.