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Hello Bojan Operation of the volume control is a known firmware issue I need to address. Yes one could have designed it with a single SMPS regulator, at the expense of higher supply current. Though

?I use two rows of 6 machine pin sockets on all my QDX and QMX and 4 pairs for the BPF caps. See attached HB QMX prototype. 73 Ross

Not to mention that TRUE RS232 levels swing + and - at those higher voltages.? So your 6V RS232 logic is very likely switching between +6V and -6V. There is a good explanation here:

Have you tried *Termite* ?? Current version is rather old and may even I have is 3.4: https://www.compuphase.com/software_termite.htm Very simple terminal program with a separate "line input with

Hi Hans, I see my QMX as a very well thought out rig. Works nice. FT8 and CW. I built it for +12V. But the "too" small PCB means there is no place for an additional dedicated GPS connector for

Question answered.? Per Hans, pretty much any SMD 10k resistor as long as it is 0603 size.

Has anyone tried replacing the switch with a relay and worked out a "tune button" (or tune output) that would pull this into the circuit for ## seconds, then release it? It seems this kind of thing

Others have posted to Chris as the original poster so I will direct my apology there. Chris, I needed to look at the posting message title to see that the board in question is a Rev 5.? That is an

The sockets work out great on the QDX. I'm about to try them on a QMX so can't say how that works. Space may be tight. 73, Cliff, AE5ZA

That would be great Ross...I'm looking forward to building one for 6-meters...Many thanks in advance...Jim WB2LHP

Aha, I knew I'd seen a photo with pin headers under the BS170's recently - check out the picture of the heatsinking on message /g/QRPLabs/message/108109 Might want to ask Cliff, AE5ZA

Hi Stephen. I was probably a bit harsh in responding to you. Your idea is a good one, and there might be a great part out there that reduces parts count at low cost and is repairable by the average

After repairs done multiple times replacing FET Q9 in my QDX transceivers the pads are getting “tired.” ?I used some small brass tube stock (~1 mm outer diameter) to make eyelets or grommets to

My QMX kit is somewhere between Turkey and the UK so I'm getting prepared...? Has anyone tried or thought it necessary to fit sockets for the BS170s?? Is there space on the board?? It seems to me

? Hi Chris, Whoa! Sounds far fetched but reported DC behaviour on D3 and D6 is inverted logicwise to what I would expect and is definitely the odd one out. Now I notice the same on your original

LIN_REG_EN is connected to a MCU pin through a 100K resistor. It's quite possible the MCU is taking some current even when inactive, this will lower LIN_REG_EN relative to the supply.? I'm sure that

Good morning Hans, I was already impressed by your technical abilities, but this is another powerful example of communication and literary skills! Top! Hans Merz / Pa3AAW

It is a long time since I played with my QCX so I do not remember exactly my solution. Using Windows I had to find a suitable terminal program, or reset something for it to work. If not Putty then

Hi Jerry, I just realized you should get a ? reply to an unrecognized command, not a '. You cant use an RS232 to USB adaptor either, you need a SERIAL to USB adaptor (as in the QLG2...?) 73 Ken

Hi Jerry Yes, QCX has a timeout. You can't type a command in one character at a time at human speed. You need to prepare the command elsewhere, then copy-and-paste it in so that all the characters