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Re: QCX 80, key and stray RF Issues
I'm using a 3S LiPo battery (+/- 11.3V). Antenna is located in an attic and equipment is in a first floor room. A?short?counterpoise is connected at the L Tuner and runs around the floor. (I'm
By robin.travis@... · #19841 ·
Re: QCX 80, key and stray RF Issues
-- What are you using for a power supply?? Battery or AC supply?? You might be getting RF into the supply. Also, that antenna is going to use the rig as a counterpoise if you are not grounded well
By K2TL Jim · #19840 ·
Re: 11. Potentiometer tuning for the Ultimate3
OK Hans, thanks for the update. Merry Christmas and a Happy New year to to you and your elves. 73 Ken G4APB
By KEN G4APB · #19839 ·
Re: QCX 80, key and stray RF Issues
Robin; Now I am no expert in this area but what what I would suggest it appears you are not well grounded. I have the QCX-20 and don't experience the issues you are. However I have a Yaesu
By Kurt Zimmerman · #19838 ·
QCX 80, key and stray RF Issues
I am not as experienced as many of you out there but feel that some recent experiences and issues?may be?useful?for some others completing a?kit for the first time Firstly, I managed to build the
By robin.travis@... · #19837 ·
Re: QCX 3D print
Wish I had a printer heck I don¡¯t even have room for one. Full time RV Sent from my iPhone
By Jess Gypin <ontarget1911@...> · #19836 ·
Re: QCX 3D print
Thanks guys - attached picture of G3XVL's short case version. I expect pictures from you :-) 73,Dave
By Dave James · #19835 ·
qcx boxing
ok, i got rid of my short circuit I have again 5v on the output of ic1, but my atmega is still not dismal and ic3 is abnormally hot and I have the bf again, but no mixing so no reception I have 5v on
By Joel Fournol <f6cht@...> · #19834 ·
Re: QCX 3D print
Thanks guys - attached picture of G3XVL's short case version. ? I expect pictures from you :-) ? 73,Dave
By DAVE JAMES · #19833 ·
Re: [QCX] Oops! Think I fried my audio amplifier?
I believe you're right - I think I wrote down pins 5,6,7, and 8 backwards - 5=8, 6=7, etc. The earphone jack is already externally mounted to my case. ?I'm getting a bit of a pop and hiss on key
By N1EDC · #19832 ·
Re: FSKCW on U3S QRSS 30m in preparation for New Year's Eve
Dear Al, Just for giggles.?? unplug your GPS module and see if that changes anything.?? Also put some .01MFD and .001 Capacitors on the input and output side of your 5 V DC regulator card. Check
By David R. Hassall WA5DJJ · #19831 ·
Re: What determines 'Tune' frequency
Hello David! I've doing some tinkering around this morning. I was trying my U3S barefoot without GPS connected to see if its absence would help. Well, it didn't seem to matter.? On the input side of
By Al Holt · #19830 ·
Re: [QCX] STATIC IN RECIEVER
Forgot Jess AE0CW
By Jess Gypin <ontarget1911@...> · #19829 ·
[QCX] STATIC IN RECIEVER
Has anyone else noticed static or something like buzzing in the receiver depending on how the board is laying or what It is sitting on? And what about howling feedback with the audio gain turned up
By Jess Gypin <ontarget1911@...> · #19828 ·
Re: What determines 'Tune' frequency
Dear AL, I see your QRSS signal clearly on my 30M grabber this morning.? You just popped in.?? It still looks a little rough but improving.?? One note that I saw is the absence of a startup
By David R. Hassall WA5DJJ · #19827 ·
Re: [QCX] Oops! Think I fried my audio amplifier?
The schematic shows IC10's output (pin 1) connects to an electrolytic capacitor before connecting to the earphone jack. So even if you shorted the audio jack pins to ground you shouldn't have killed
By Al Holt · #19826 ·
Re: [QCX] #1002 up and running at 20m
great work Matthias! I'm waiting for your version of AGC...
By Andy V. Borisenko · #19825 ·
Re: R17 and R24 values ?
We did check some more kits here for 20K resistors and found only one. So I think it is a fairly small proportion of kits which are affected. Anyway the modification makes it easy to fix (or I can
By Hans Summers · #19824 ·
Re: R17 and R24 values ?
R47 being 10k is mentioned in the? FAQ here https://qrp-labs.com/qcx/qcxfaq.html And I see that the 50k/20k problem has just been added too. No problem with color stripes here, I'm partly
By ON7DQ Luc · #19823 ·
Re: 11. Potentiometer tuning for the Ultimate3
Not meaning to be quiet, Ken... I just am a bit overloaded with work... the QCX stuff has been very busy, trying to speed up the backlog of orders etc. Things will calm down soon... and I can fix the
By Hans Summers · #19822 ·