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QCX Keyer problem
I completed my 20M QCX and measured about 3.1 watts with 14 volts input using the onboard wattmeter, so I was ready to put it on the air. Assume that this is a satisfactory output. (Should I do
By Phil/K3UT · #21216 ·
QCX microprocessor startup
A frequent subject, dont see a path for me to pursue. Built qcx kit, December 2017 ship, group 2 board, made the three mods suggested (did RF choke pin 20 to 7 instead of Schottky). Start up was
By capallen@... · #21215 ·
Re: wire jumpers PCB #u3s rev.3 #u3s
Hi Martin, Flip the PCB over and you will see the unnamed terminals are on the same tracks as a named ones. Short answer yes you can connect +PA, +5v and Heat altogether. The unnamed terminals provide
By Alan de G1FXB · #21214 ·
Re: r33 36k resistor
As to enclosures, I didn¡¯t get to it quick enough and my 14 year old ham made one out of Lego¡¯s. Only temporary I hope. Don WB9STS
By Don Baker · #21213 ·
Re: Display flashing U3S
Hi Mario, Have you tried squeezing the two boards together, in rare instance the interconnecting plug / socket can oxidise and cause a poor connection? Also as noted in the assembly manual, the PCB
By Alan de G1FXB · #21212 ·
U3S error 5
I assembled the kit (rev 4) without problems, tested per the manual with ~.5 watt output, installed gps module and got good locator,? calibrated WSPR and was received and decoded properly on my
By Wally Wolfe <wolfe.wally@...> · #21211 ·
wire jumpers PCB #u3s rev.3 #u3s
In the manual?assembly_u3s_r3_a4.pdf on page 10 there are several circled in yellow, the lowest is not clear to me. Are the unnamed pinnes above +Pa +5V and Heat parallel with +Pa +5V and Heat? In
By Martin Wilens · #21210 ·
Re: key short the first dash
Thanks Alan, sounds like the thing to do on the short term until the bug is worked out with the keyer.
By N3HAM Jerry · #21209 ·
Re: key short the first dash
Hi A1aop, The solution to differing standards of key wiring has being reported before. The solution for straight keys / Keyers is to build a short adaptor lead, a 3.5mm line mono jack socket connected
By Alan de G1FXB · #21208 ·
Re: key short the first dash
Having the same problem no matter what paddle I use. Haven't tried an external keyer since the mono cord from the keyer shorts the rigs jack, unless I'm doing something wrong.
By N3HAM Jerry · #21207 ·
making mods to the clock kit #clock
The clock and GPS kits are neat. Of course, I can't leave well enough alone so I am working on a portable gps/clock powered by four AA batteries with front panel switches to turn off the GPS and
By bill K7WXW · #21206 ·
Re: key short the first dash
Hans, is there a solution to my problem?
By Andy V. Borisenko · #21205 ·
success!
I've got 20m QCX S/N 924 working. I was getting the line of blocks, and L5 was showing 20MOhms. I replaced it with a 100uH on hand and fixed the problem. I've aligned it but it's late now. No mods --
By Bill Wrbican · #21204 ·
Re: AM Broadcast Interference QCX
Thanks Jerry, All great ideas. I will try them. I tend not to ground the filter since I don't always have it in line, I sometimes MW dx. Shack is on the second floor, though I do have a ground line
By N3HAM Jerry · #21203 ·
Re: AM Broadcast Interference QCX
Yes the interference goes away. Looking to eventually case it up, I do have a tin that it fits in, just need to figure a way not to butcher it up. It would make a nice companion to my PFR3 for park
By N3HAM Jerry · #21202 ·
Re: AM Broadcast Interference QCX
They are listed at 50K, but not sure it's that high according to a search on the station. Think they may actually be going off air and selling the transmitter site for developement. Last community
By N3HAM Jerry · #21201 ·
Re: Ultimate3S : huge frequency drift
Thanks all for your answers. These confirm the issue I experience?is not due a technical failure / malfunctioning?but more due to structural reasons, which I'm going to investigate. 73 and thanks
By ON4KHG · #21200 ·
Re: Receiver thump
Happy dance sure was too quick to replace that 10 pf 989.16uf works much better. Sure getting skilled at replacing parts especially this one Many tx for your support P
By Phil Moorey · #21199 ·
Re: Might be useful for testing etc - The LED-O-METER
Thanks Alan. I deleted the old message because there is no edit menu on this group, so some readers may be confused. Revised message is here? -
By - Andy - · #21198 ·
Re: r33 36k resistor
Thanks everyone for your replies. I dug deeper into that junk box and came up with a carbon resistor and it measured 36 k exactly so i used it. now I am torn between finding a box or mounting every
By bill1973ham@... · #21197 ·