开云体育

So to read the approximate RF Power out on the QCX... I have to jumper the RF Input pin to the +V Output. Is that correct?

Thanks.

Barry. ?VE3ZLB

HI Barry.
No. You connect a lead onto the RF pin (middle) and then just touch/probe the other end on the antenna connector centre pin.
Make sure you have a 50ohm dummy load connected and then key the QCX to transmit whilst viewing the RF detector menu,

73

Wow. ?Many thanks. ?I actually have one of QRP Labs dummy loads with that convenient test point for RF.

Thanks Nick. I’ll have a look when I’m in the shack. -26c in Sudbury ON this am.

brr

30 Metre QCX on a 12V battery.? Firmware 1.00d

Looks like I'm only getting .21 watts out.? WSPR works well at that power but no CW contacts yet.? I'll have to do some more research to try to figure why output is so low.

Barry

HI Barry,

That is very low indeed. Please double check the solder joins in the LPF, especially on the toroids, make sure the enamel coating is removed.
Also check for continuity between the PA mosfet output to the antenna connector...

My 40m on 13.6v gives me 5.2w.

73 Nick, VK4PLN

Thanks Nick. I will check and respond later today. ? I suspect the toroids. At first they seem so simple but that coating can get ya if you are not thorough.?

Barry

I also seem to remember some other folks getting low RF output because a toroid underneath the LCD screen would contact one of the tabs holding the screen in place. ?I bent the mounting tab flat against the LCD board on mine. ?I would do it to yours too just to be safe.?