开云体育

Karl; There's a longish thread back when the high-band QDX was being built by many, but output power was not as high as many would like. /g/QRPLabs/message/101412 Han's adopted the

You applied pressure to the board. Maybe caused something to short circuit. Even under the board, you had it on the bench unmounted. 73 Alan G4ZFQ

Matti, hard to say without more information. Maybe after getting some results from your tests. 73 Ludwig

I know people post pictures sometimes, but I cannot see them. I vassilate on whether my QMX+ is working correctly or not. I have never received strong CW or FT8 signals, but they are there - but

Hi Gert, Note that a minimum voltage drop is required.? From the specs: * Output adjustable from 1.25V to approximately 3V below the input voltage Three volts below 13.8 is 10.8 volts.? This

Wei, what was the symptom of the RFI problem? Maybe some erratic behaviors of QMX like turning off itself or the keyer suddenly not working, etc.? I do remember having that kind of problems when

Really Weird Twisted Sister Transformer.? This is the 12-volt version of the Wierd Twisted Sister Transformer for 9 volts. This is in the transformer manual

Really Weird Twisted Sisters Transformer yahoo.com@groups.io> wrote:

What does the acronym 'RWTST' mean, or translate into?? Mr Google has not been helpful.

Hi Yoon, I was inspired by your post and tried myself with MFJ1720, the major problem is RFI. Have you seen RFI problem in your handheld setting? I can put battery in my pocket to reduce

/g/QRPLabs/message/139091 Elapsed time 3 days... -- Allison ------------------ Post online only, direct email will go to a bit bucket.

It seems any photos attached to a thread are gone after a couple of weeks? So instead of posting my handheld QMX photos here again, I recommend you to visit my QRZ page to see how I'm operating QMX as

Hans Could you take a moment to let us know the status. I'm sure there are lots of eager to get it. Thanks

Ludwig, thanks again for reply! The QMX QMX_plus Startup ( /g/QRPLabs/wiki/36878 ) is good advise. I will try to measure some of those voltages and the currents as well. But still, I

Try putting a simple 50-150cm whip antenna on an HF TX and then measure the performance / narrow bandwidths / low effiency / variable impedance due to numerous external factors whilst actually

So, what I did while using an old crystal controlled transmitter, combined with an SDRplay RSP-1, was to put an RF triggered TR switch between them. That could be done with a transceiver like the QMX

This might interest some. It could be used with a switch that turns this receiver's RF input off when the transceiver is transmitting. Several companies make these switches. "Could This Be The BEST

Somehow, handheld HF is an under-served market segment. I have seen some very nice modifications in this group and I tried myself but failed, I end up brought a KH1. If you have a full-time job and

Perfect solution Joe, thanks for sharing. Will keep your idea for when I get my QMX+ Cheers. Gert

Thank you all, for your valuable replies! I did, indeed, only read the QMX docs - even though it is mentioned on various locations that one design is based on another so now I have to ask myself why I