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Richard, I don't have any specific temperatures to recommend. Junction temperatures for the BS170s will certainly be higher than case temperatures. Probably much higher. 150 C is probably the highest

I understand qmx is more complex than the qcx, and ability to do ft8 wspr etc can stress the transmitter and possibly also the dc/DC. I would be interested in operating wspr on 160 and 80 meters,

Hi... a tangential question.. i have been running Na3P with my QMX+ flawlessly for a few months now BUT today... .the audio output from Na3P went to almost zero..you can barely hear anything from the

I do not believe QMX finals are nearly as fragile as they are reputed to be.? I have not blown any in my QMX+ nor the two QMXs that I own.? And if you are only operating CW, 12.0V is a good

last I saw there was a note to monitor output transistor temps when using WSPR mode. ?Understandable. ?What is the range of allowable temps? ?Exactly where would one measure this with an IR

Stan, that's perfect, thank you! I've got a Low band QDX I want to build up, but I'm going to customize it/tweak it a bit, and I'm planning to use the QMX+ BPF values for some bands.? I was trying to

Hi, I am putting in right here with my enquirer about QMX being hypersensitive to supply voltages over 12.00000000000000. That QMX does things I would like to.. except for frying finals so easily. I

Good catch Ron! -- 73, Dan - W2DLC

QCX-Mini is sold.

It's probably not necessary on QMX+ I have done it frequently with the old U3S etc plug-in bandpass /low pass filters as these do get quite a lot of handling during active use.? ? Several breakages

Here they are.

Mentioning a model would be good You'll most probably need to order one from Hans instead *BUT* It's very unlikely the CPU killed the diode It's more? likely the diode died trying/failing to save the

Turning the rig on shows 1_00_027 as the version. I initially set it to CW and then Practice mode. After I installed the USB cable, I could turn of the Practice mode via the Menu but cannot change

I can't find a picture or listing of this anywhere..... the assembly manual leaves it unclear, and the firmware manual only shows a QMX MB screenshot, and there's nothing in the Wiki I can find about

I discovered an interesting anomaly when repairing a QCX mini recently. The owner had said the buttons were locking up. I found one instance of intermittent buttons from a bad solder joint but no

Mike, et al, RF in the shack is a feed line issue when there is rf current flowing on the outside braid of coax (not a mode (CW vs SSB or FT-8)) issue Several factors induce the feed line to become

QMX bought all assembled 3 weeks ago and a few QSOs without problems. And suddenly it doesn't restart. After investigation, the +3.3 V has a short circuit. After removing the doubt about the

Anyone willing to share an LTSPICE model of the filters or RF section of the QMX+ ? It would be interesting to compare a lab sweep vs a SPICE simulation sweep. 73, Joe W2JEJ [email protected]>

Hot glue is pain to remove if needed. Instead use B6000 or 7000 glue, holds just right not toxic to components, and easy to remove with just a small swipe of alcohole. Do not use silicone since it

Steve, Is it mentioned in the manual? Just do the scans, if they are something like correct you may just leave them. The fundamental test is the difference in noise when the antenna is connected on