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In normal operation the modulator voltage seems to be 90% of the main power, does the modulator voltage increase above that for the peaks of SSB?

If you use a binocular toroid isn't there also coupling between the two transformers?

Just about to finish my QMX+ build and I have a voltage question.? The kit was built for 12 volts.? I have a 100 amp/hour lithium iron battery for vhf base station emmcom backup.? At full charge,

Wow! I just remember seeing the 10,000 figure on a post some time ago. That is really an accomplishment! Jack, W8TEE

This type of request needs to be submitted to the support desk at qrp-labs, not this user-supported forum. Stan KC7XE

Hi Peter, all

Tim, great idea re. the tab cutting. I have a couple of those upgrades lying around and will upgrade my QMX+ too. Will post pics and results when done. It will be nice to have a unit that isn't afraid

Id like to thank everyone that took the time to answer my question regarding the QRP Guys mic. Larry NA0F

George, Would you mind sharing the info for the 140$ PC you bought? 73! de Bekir TA2RX 10 Nis 2025 Per 18:36 tarihinde George Korper via groups.io <georgekorper= [email protected]> ?unu

I purchased an amazing $140 mini PC and use a USB cable. QMX + doesn't need a hardware change.

I have to smile when I keep seeing requests for more power, surely the answer is in the name, “QRP Labs”. Notwithstanding the 10W and 50W add on amplifiers, surely the radios themselves should

I've had some discussions with Hans about what it would take to produce a very useful user-friendly digital communications "appliance" based on the QMX. I think that one way to implement this would

https://www.youtube.com/watch?v=QqMDmRqCZDI&t=3s This reminds me of what I did with my QCX.? If I had a top case with correct size hole for the display it would look professional, as is I have to

Hi Jack et al Thanks OM, encouraging comments :-) I wouldn't be too concerned about Hans workload. Think about it. He has Gross underestimate :-) To be strictly accurate: 21,343 QCX-series (QCX,

Hello Marek, please read my post from a different thread. /g/QRPLabs/message/142910 Maybe there is a medium value resistance between neighbour pins. If you put voltage at this place

Sorry, typo!!! Correct is 2 - 3, 3 - 4, ..., 14 - 15.

Jim, so something was wrong in this area. Maybe you fixed not all. A missing connection is bad and also some unwanted connection between pins. Such an unwanted connection between neighbour pins may

Maybe the reason he blew up the BS170s during calibration is because Q507 was dead already. Tony AD0VC

Steve, I'm not sure about the BS170 but 99% sure Q507 is dead (only some silicon wire). Yes, a broken BS170 could affect Q507. There is a small possibility some parts to drive Q507 are broken but

I’m fairly certain all the pins are soldered on both sides. My question is why the display is “corrupted”. Processor must be working to some extent. Thanks for the response. Jim w0nkn