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I scavenged a 30pF from my QMX+ kit to get me through this QDX build until I can get a replacement. I may contact Hans and have him add this to a GPS order... 73, Steve AK0M

I clear thick areas of flux build up with a careful and gentle scraping with the back edge of the pointy end of a #11 Xacto blade.? Then a very used, old soft toothbrush to brush way the flux

I am just finally getting around to assembling my QDX rev 4 to take with me on a KL7 visit this week. Discovered I am missing one of the 30pF capacitors. I have a plain ceramic 50V 30pF that I could

I've been using no clean flux on my QMX+ and using 91% isopropyl UNSUCCESSFULLY. A friend recommended a product called "flux off" but it costs $30 a can (too much for me). I don't remember my old

Perfect. No perf board required.

You're welcome ... and here is a photo showing how I built it.

I have gotten -26 reports on ft8 and still completed the QSO on my QMX+ 73 -Mike

This looks like a great method and eliminates the box I was working on to go between the KX3 (ACC2) and the amp. ?Thank you! ?I knew there was a brain-trust out there.

I added this mod inside my 50W amp to add low-active PTT capability without disturbing the existing high-active PTT.? Then I wired up a PTT cable that connected the KX2's PTT signal to the tip of the

Thanks for this! ?

Long ago (1974, oy), I had a summer job at JPL and was sent to NASA soldering school for a week.? The teacher impressed upon us that "flux is hygroscopic" and could not be allowed to remain on any

Get plenty of ferrites on the interconnecting cables and power cable and a good choke on the antenna feedline Also although the QMX is low power try to get the antenna some metres from the shack

I work POTA exclusively 5 watt. Either with my QCX or QMX and I’ve had QSOs from coastal NC into Europe, Alaska, Hawaii, and even into New Zealand. ?Antenna is either a QRPGuys triband vertical or

And to add for the FT-8 for example, the difference in the receiver bandwidth used for the FT-8 is 50 to 2700Hz as compared with the SSB bandwidth. It means that considering the noise alone it

Hi, the precise number for the receiver could be the MDS or the sensitivity. It is measured at the receiver input. MDS - the minimum discernable (or decodable) signal Sensitivity - the signal that is

Hi all Note that Digikey will sell you an individual resistor or capacitor if you want it. The postage cost via USPS (3 days typical) is $4.99. 73 Hans

Does adding a small ground screw to the QMX case make sense? Every antenna should be perfectly resonate at the frequency being used. SWR is then 1:1 For a vertical antenna, a counterpoise or ground is

Thanks, Tisha. Mouser sold me four of the caps for about 11 dollars total with shipping.

These settings worked for me using a PC. Start N1MM Logger+, click on *Config Tab* , click on “Configure Ports, Mode Control, Winkey etc...” N1MM Configurer *Hardware* Tab: For QMX: Port: COM#

Yes Don you have right, it is planned that the inside of the housing will be completely covered with copper foil. The heat derivation is a big issue.