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Re: QMX build troubleshooting
Removed one leg from L502 and still had short to ground on both primary and secondary of the T501. I removed it and currently rewinding.
By f4jvu@... · #143731 ·
Re: FT8CN Getting it to Work!
I feel the same.? With QRP I find it necessary to switch transmit slots often (since there's always someone who can't hear you and chooses to transmit in your slot).? And finding a new slot in FT8CN
By Mike KK7ER · #143730 ·
Re: QMX+ with WA3TFS amplifier
Jamie, glad to hear? that all went well. If I remember correctly, you installed C17 with a switch to bypass it.? Whenever C17 is switched inline, RF detection will be active and work without a PTT
By AE5JE - Jim · #143729 ·
Re: QMX build troubleshooting
That should have read ¡®short between primary AND secondary of T501¡¯
By Nick Garrod · #143728 ·
Re: QMX build troubleshooting
A short between the primary or secondary of T501 or Q507 is shorted and the fault is elsewhere. Lifting one end of L502 and measuring continuity to ground, as suggested will point you in the correct
By Nick Garrod · #143727 ·
Re: FT8CN Getting it to Work!
Nate, I have used an Android phone with FT8CN and a QDX for about a dozen POTA activations. I'd call it workable, but not really enjoyable. But I'm not about to lug a laptop or tablet into the
By Jared N7MAW · #143726 ·
Re: Release of version 1.2 of ABS solution for QMX+ (Automatic internal antenna tuner, internal battery and internal speaker with audio amp) #ABS #ATU #PSU #QMXplus
I¡¯d also like a full kit if/when you do an arcing group buy. My email is good on QRZ. BrianB N6CVO N6CVO@arr¡­..
By BrianB · #143725 ·
Re: FS: QCX kit unbuilt rev 5 pcb
What band is this?
By Bruce N9JCV · #143724 ·
Re: QMX build troubleshooting
L502 has continuity to ground. I've removed the finals too. The short is still there on 12v.
By f4jvu@... · #143723 ·
Re: QMX build troubleshooting
Before unsoldering L502 check if it has continuity to ground, if it doesn¡¯t, the fault isn¡¯t in the PA or modulator.
By Nick Garrod · #143722 ·
Re: QMX build troubleshooting
It is probably easier to unsolder one end of L502 and checking, before leaping in to unsolder the finals. Check the board carefully for any solder whiskers. Nick G0OQK
By Nick Garrod · #143721 ·
Re: FT8CN Getting it to Work!
did anybody tried this?, please let me know https://github.com/brunodev85/winlator 73 DE muhsin TA1MHS
By Muhsin TA1MHS · #143720 ·
Re: QMX SSB internal mic? #ssb #qmx
I noticed when doing the mic leveling that I got louder peaks when I wasn't pressing the PTT button on the external mic, but the actual output when transmitting is based on the levels when pressing
By Daniel Conklin · #143719 ·
Re: FT8CN Getting it to Work!
Hi I modified my QDXs so they can work with 5 Volts from the USB of PC, tablet or phone. With FT8CN now I can run a minimum system from my phone/tablet Power is about less then a watt, so you can call
By Muhsin TA1MHS · #143718 ·
Re: Another good solar description
Summary: When there¡¯s a solar flare.. go mow the lawn.
By Mike KK7MMN · #143717 ·
Re: 3D model of QMX+? - To 3D print front and rear covers
It's not a model per se, but did you notice the "Enclosure engineering drawings" on the info page about the QMX+ (https://qrp-labs.com/qmxp.html)? I would imagine they would give you the information
By Todd W2TEF · #143716 ·
Re: QMX build troubleshooting
Oh, my. Then you're going to spending time on the main board. Lots of places to look. I'm sorry. Something easy - just unsolder the finals. After that, if the short is still there, it's a matter of
By Frank Fertitta AA5IT · #143715 ·
Re: QMX build troubleshooting
The 12v short is without the boards installed.
By f4jvu@... · #143714 ·
Re: QMX build troubleshooting
Wow, that's not good. And if you unplug each power supply one at a time? Need to find out which one is blown. They both have the +12vdc going to them.
By Frank Fertitta AA5IT · #143713 ·
Re: Power out on 60 mtr QCX+
Hi Everyone Thanks for all you advise and comments on my low power issue on my newly built QCX+ for 60 mtrs. After a lot of time playing around with the LPF I decided to restore all the toroid values
By Keith · #143712 ·