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Hi John Yes, certainly it is not a bad thing :-) But as Shirley KE1L said, most of the time particularly on the lower bands, the band noise or local QRM is much higher than the receiver noise floor

Hi Elvin Yes, this happens a lot, too. I get someone emailing me that they are missing such-and-such capacitor, they fitted all the others, and they have one left over. And it's not the right one,

Thanks everyone for your thoughts. Changing the dual op amp and getting 8 dB more sensitivity and decreased noise seems like a valid improvement to me. Regards, John W9NET

hello all--- my C401(20-10 meter QMX) was labeled "K3J" and tested with my cheap LC meter at 28pF. so... possibly your C403(80-20 meter QMX), C401(20-10 meter QMX) is the same "K3J" labeled 30pF

Hi Ian I'm using the same approximation for arctan that Guido used in uSDX, which is quick and simple, and I haven't found it necessary or beneficial to do anything more precise. Albeit I do mine in

Hi, Can the attachments of this old thread be downloaded from somewhere?

If your external program is keying the QMX via the paddle port or keying commands, it should be in CW mode. If it is generating a tone to send (this is how I use FLDIGI), then you need to use DIGI

I had a similar question. When using(transmitting) the QMX with FLDIGI in CW mode, should the QMX be in DIGI mode or CW mode?

I purchased a prebuilt QMX+ at FDIM and only ?just got the opportunity to fire it up. For some reason it hears CW better in digital mode than in CW mode. Any suggestions how I can ?fix

Hi Hans Thank you so much for your insightful comments. Although most of it is over my head. I do sync the frequency change with the amplitude inasmuch as they are output in the same sample at the

Yes, Hans, many congratulations! And I liked my QMX so much that last week I ordered a QMX+.? Just received it, and am ready to have fun putting it together. And last night after photographing the

Congratulations to Hans and this group who also deserve credit for their contributions. The way Hans has structured the whole enterprise no doubt is noticed by the 'League' members. Hans has really

Congratulations Hans! -- 73, Dan - W2DLC

Thanks for getting back Stan. With the encoder for the Rate/Messages disconnected (the non-grounded end of the encoder was lifted from the circuit) and the encoder push button was no longer

Congratulations, Hans! Well done sir... 73 Steve WD8DAS sbjohnston@... http://www.wd8das.net/ http://af4k-crystals.com

FYI I asked Fred Kemmerer, AB1OC, New England Division Director. Here is his response. -Steve K1RF ------ Forwarded Message ------ From "Fred Kemmerer" <fkemmerer@...> To "Steve Dick"

I guess the ARRL's letter and cheque may have gotten lost in the mail.

Can you describe how you determined that the problem is still there with the encoder switch disconnected?? Is this happening spontaneously with no input from the encoder?? From your prior posts I

Thanks Paul! What jumps out at me is that on 12m your output power is low and current pull is high. That sounds similar to my QDX situation on 10m. Do you find your finals overheat on 12m? Naively it

Finally, with the encoder switch disconnected the problem still exists. So I think (item #1 in my previous email) a fault in the the encoder is unlikely. So, unless I'm missing something, it looks