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No reason there should be a difference. I'd suggest you drop power by using lower voltage. No need for 5 watts, that is asking for trouble when it is not necessary. What band? WSPR users often do not

Hi Daimon, The key clicks are definitely there and they can be annoying - after I did a bit of fiddling with the settings and also based on what others reported here, I ended up with something usable

An update After approx. 3 hours / ~11V ~5W, attached picture is some of what I managed, most of it is in Europe but I got hold of one in Japan :-) even though I hear North/South America fine, they

Hello Dan, Digi mode or CW? Regardless, please check section 2. of this post ( /g/QRPLabs/message/118679 ) , see if it works for you. Regards, YO3GFH op. Adrian

Try feeding it with 450ohm ladder line. For 80m you can try tying both sides of the feeder together our try grounding one side. When you ground one side , it acts like a counterpoise.

For me the key clicks are quite noticeable (especially at low sidetone volume) but I can live with it. At a sidetone volume of 25, *it is all clicks and no signal!* Anyway, these are my

Yes, tried that and att settings, att lowers volume but volume control still has no affect on volume, no matter how many times I turn it. Appreciate the help but any other suggestions please. Thank

Hi Dan - Your "QMX HiVol DL" recording captures what my QMX sounds like under realistic conditions when connected to an antenna. Thanks for posting those. Mark [email protected]> wrote:

Emory, Have you tried the Audio Volume Step control? I believe the default is 0.25 dB per step. At that level, it seems like the volume control doesn't do anything! It actually does, but takes many

BTW, Hans, I never said I was happy with no key clicks, just that I was happy that they were reduced enough to make the QMX easily useable with 017, while before it was bad enough to make me use

Hi Dan, I had a similar problem on 20m with my QMX. TX and RX was not ob transceive and about 450Hz off. A factory reset resolved the issue. I had it twice so far, but do not know what caused it to

Just finished new build of QMX 20 to 10.? But no control of volume?? Its volume is full, can not adjust it?? Checked connections several times, all connections on the pot on both top of board and

I have key thumps, such that my QMX is unusable.? They are worse on the lower bands.? I have tried a variety of Audio and AGC settings to no avail.? Settings adjustments are at best like aspirin

Dan de NM3A at mail dot com

John I think you are correct.I believe I would need a spectrum analyzer to correctly and safely measure the final output harmonics. Might invest in a TinySA.? Greg Yahoo Mail: Search, Organize,

I have one each hi band and low band QMX Rev 3 using _017. Settings are: AGC ON Threshold 7 Slope dB/dB 95 Noise Filter 5 Hang time 50 Smooth Samples 99 Recovery dB/S

All, I definitely have the clicks. They are not as bad as pre 017 levels, but definitely there. They are much worse at high volume levels. So from a practical point of view, when you work a strong

Continuation of a story. After the sudden strange disappearance of the ability to turn on the RIT, returning to factory settings and re а flashing the firmware did not help. Checking the resistor and

Perhaps you intend to solder connections to the unpowered LPF you desire to test? JZ [email protected]> wrote:

Marek, When QMX is unpowered, the PIN diodes are all in a high resistance state. No particular LPF is selected. What would the VNA measure? When QMX is powered on, an LPF can be selected, but the