Re: QMX the current is still 0.1A
When I fire, the Practice/Message mode blank display is changed to S, which I didn't see in the instructions
By
chanceyan
·
#112539
·
|
Re: #QMX Ordering question
#qmx
Thanks Hans... BTW, tried to PM you off list as soon as you made the announcement. Apologize for the noise! Paul
By
Paul - AI7JR
·
#112538
·
|
Re: SteppIR and QRP Labs
Congrats on the collaboration Hans. I was an early SteppIR antenna user with a 3 element yagi at 100'. When the antenna works...it works well. When it doesn't........ If you are considering a SteppIR
By
Tim and Janet
·
#112537
·
|
Re: QMX suffers zero negative impact from deleting L401 (with measurements)
I see a lot of "I think" in this thread, and not a lot of "I measured," or even "I simulated." One data point is worth a million "I thinks." I fired the strongest test signal I have access to,
By
Stephan Ahonen KE0WVA
·
#112536
·
|
Re: SteppIR and QRP Labs
Hans, Fantastic opportunity with SteppIR! Looks like your wheeling and dealing worked out pretty well in the end. -- 73, Dan? NM3A There are moments when everything turns out right .... Don't let
By
Daniel Walter
·
#112535
·
|
Re: QMX High swr into 50 ohm dummy load
Did you post the receiver RF sweeps on all bands? Also, can you post close up photos of the LPFs?
By
Ryuji Suzuki AB1WX
·
#112534
·
|
Re: #qmx PCB Rev 2
#qmx
I 'painted' the SMPS screw heads black with a magic marker to help me remember not to loosen those. I also put a nylon washer under the screw closest to the power jack- those got red magic marker
By
Daniel Walter
·
#112533
·
|
Re: QMX PC Connect, Anyone?
Well..... THAT problem is fixed. However, once connected to MLDX, the audio volume drops by about 90%. Disconnecting QMX from the application does no good, nor does quitting the application. Removing
By
Jim Bennett / K7TXA
·
#112532
·
|
Re: QMX PC Connect, Anyone?
It IS fixed. Don sent me a pre-release copy with the Carriage Return removed. QMX now connects instantly to MacLoggerDX as it should. Jim
By
Jim Bennett / K7TXA
·
#112531
·
|
Re: #qmx No Current Draw - New Build
#qmx
#troubleshoot
#troubleshooting
Tom, Until you know the reason for the fault, I would not take a working board to test the nonworking radio.? You could wind up with two nonworking radios. Do you have the DMM leads switched?? That
By
Evan Hand
·
#112530
·
|
Re: #qmx No Current Draw - New Build
#qmx
#troubleshoot
#troubleshooting
Yes. And you can order replacement boards? " SMPS boards are also available separately in the spare parts section of the QRP Labs shop ( http://shop.qrp-labs.com/qmxsmps ). "
By
Chris KB1NLW
·
#112529
·
|
Re: QCX Mini kit order
Sounds really good. Thanks Hans. 73, Dan VE7DAQ
By
Dan
·
#112528
·
|
Re: #qmx No Current Draw - New Build
#qmx
#troubleshoot
#troubleshooting
I have another working QMX. Would it be a bad idea to pull known good power supply board #1 and try it?
By
Tom KE5CW
·
#112527
·
|
Re: #qmx No Current Draw - New Build
#qmx
#troubleshoot
#troubleshooting
Wow!? I don't know what to say.? Anyone else any ideas?
By
Chris KB1NLW
·
#112526
·
|
Re: #qmx No Current Draw - New Build
#qmx
#troubleshoot
#troubleshooting
Hi Chris, I triple checked the power supply leads, then shorted the source to drain of Q103, but still nothing. No no "QMX" drive shows up. Any thoughts? Thanks so much for your help. Best, Tom B -
By
Tom KE5CW
·
#112525
·
|
Re: QCX+ (Menu not visible after startup)
You just brought back a memory. In about 1978, I was taking a break from university and working full-time on an airborne Omega/VLF radionavigation system.? One of the continuously-running background
By
John R. Strohm
·
#112524
·
|
QDX T1 DMM checks
I notice in the instructions the A to B test is talked about after using a DMM on the 2000 ohm setting. I measured ~400K ohms from A to B after putting in T1. (WTST for 9V)? I looked over my board,
By
Nate Reik N8BTR
·
#112523
·
|
Re: QMX low output on 20
David, 20 and 30 meters share the same LPF.? You would SPREAD the turns APART to move the center higher for a better 20-meter response.? You may need to take a turn off if squeezing decreases the
By
Evan Hand
·
#112522
·
|
Re: QCX+ (Menu not visible after startup)
Bruce, Check that the encoder is working correctly.? Maybe one of the contacts is shorted or stuck, telling the QCX+ that it has a long press on the encoder or one of the other buttons. 73 Evan AC9TU
By
Evan Hand
·
#112520
·
|
QMX low output on 20
3.5 to 4.2is watts on all bands but 20. 1.5 watts on 20. ?I¡¯ve squeezed windings with no effect. Where to look next? 73, David WB5GNR
By
David Hoskins
·
#112519
·
|