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Hello Bill here N3GTY. I guess I needed more information. T1 is wound for 9v and the Power Supply that I? am using is a variable Buck Boost supply set for 8v out. It also has the current draw in

I believe Hans knows about these but. 1. volume control is erratic. 2. monitor volume can not be adjusted. I reduced the 99 to 17 but volume stays loud. Thank you Larry NA0F

JZ, re: " It requires? that a high speed silicon commutating diode, like a 1N4148 or 1N914 be placed across L14 as one would across a relay coil to protect the relay driver." Could you elaborate on

Jz, re: " Regarding QMX, yes the pads for Zeners exist but are currently unpopulated. Hans has a truly elegant solution to the above problem in that the PMOS modulator that is present in QMX and is

I'll be listening ( watching ) for you as well, David. 72 plumb all over you! Bill, N4QA

Just a very quick update as this is a 40m thread and I'm mW'ing on 20m, but since my last post, I've been heard in India (8,210km) and Belize (8,254km), plus my best dx contact is now Romania at

If I can add one more bug to the list, please. On the QMX the RF Sweep usually works after a hard reset, but after that it will hand on the 40M band. I can run the other bands, but not 40M. Not a big

Evan is correct on all his points. I will add a bit more. The end-of-transmission spike is caused by an inductive Ldi/dt kick produced by L14 when all four BS170 transistors turn off. It can under

Did you purchase your QMX without a case? Tuning rate is adjusted by single-tapping the Tune control. Mark? AI4BJ

Can you describe your power supply?? Do you know what the current draw is while the unit is powering up? 73 Mike N0QBH

Trying the QDX at ten milliwatts again today. Listen hard! -- 72, Bill, N4QA

Thanks, Mike, will download a QCX Manual. Ron

Hello Dan, Mike Yes I meant 19 + 8, sorry. Typo. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl >

Comments on Hans' comments on QMX: 4: Some builders, including me, had pretty normal power out on all bands, so it is possible. 5: Did you mean 19 + 8? ? I used 17 squeezed + 9 squeezed. 6: I

I have not yet tried it ... but last summer I picked up a 4" speaker at hamfest and later noticed that it is stamped '45 ohms' on the back of the magnet.? Checking Amazon I found that these are real

Wonderful work Hans! I am eagerly anticipating the next version of firmware. On the L401 turns did you mean 19 + 9, vice 29 + 9? -mike/w1mt

I own a TI-59 (my father still has to find it but he promised to give it to me) where I started programming when 12yo. I hope it still works, but why not. I also have: - 41CX with a bunch of

In April this year, John Zbrozek, KJ4A, and I collaborated on modeling the QDX PA.? The models showed a large voltage spike when the transmission was terminated at the end of a message.? This was

Hi Mike, all Thanks, very useful; some of these are known to me, others are new. I made great progress on the firmware last week and should be expecting to release a new version this week which

Hi Luc, if it's possible I'd like to join the Discord qcx party group too, but he's asking me for an invitation. Is it possible to be invited? Thank you. Giuseppe iu8eun