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I built a 20M version but used Micrometals T37-6 toriods, however I also had to wind 14 & 15 turns as per your chart to get the inductances within acceptable tolerance. I get 3W out with about 12V in.

Colin, There is a simple alternative to the 'scope for RF tracing. A diode probe, for example https://sites.google.com/site/g4zfqradio/levels-measured-in-a-softrock-tx#diodeprobe And many other

Hi all The QCX may not work across multiple bands at the moment. When you set the Band menu item, this setting is used in the configuration of the Si5351A for quadrature output. If you tune several

Hi Hans, Thank you for your reply, I do not have an oscilloscope (I even had to look up the spelling) and have never been any good at fault finding (my wife would not agree) so I will buy the new

Hi Nick! My congratulations! Your solution is much better then I've ment before! Would you be so kind to send me address where you bought that nice case? 73! Anatoly UT5ULX

Hi Eddie The power supply I use is http://hanssummers.com/radiopsu - a homebrew supply from some years back, it has separate 12V 5A regulated and 5V 5A regulated outputs, and current metering. There

Yes, since the birth of my 40m QCX, I have it too, the dreaded start up problem, and usually need to cycle the power to get the QCX running. Not serious but irritating. What's interesting though, I

If I had to build my 40m QCX all over again, this is the route I would follow. Neat! Well done. 73 de Eddie ZS6BNE

-2 are red. -6 are yellow. QPR labs Lowpass Filters come with Yellow for 40m and up, 60 and down are red.

The cores used are T37-2 not T37-6.

Thanks John, It was your build that inspired me. Good find on the caseing. 73

Respect Nick . Well done . 73 John PD7MAA

I've been thinking the same. Giving the high number of kits being constructed obviously the vast majority (myself included and I've never put together more than a small Pixie) have had no problems:

Makes sense, that is consistent with what I have been reading others are experiencing,..

Because I red of low output in the 20m version, I wired? and mounted L1,L2,L3 together with C25,C26,C27,C28 on a tiny board and had a look at this with a network analyzer. Found that the filter has

Nick, Looking good. ken - wa4mnt

Hi Hans, I would like to second this request regarding a low battery alert. I plan on running a 4S Lipo, thats 16.8v fully charged, and 12v(3v x 4) empty, I will use the battery meter, but a simple

see the schematic. Red is steady on bij 5 Volt Green is the hartbeat every second Orange is the bit stream to external device (the QCX). You can watch the bit stream on a scoop.

HI All. I am 99% complete on my 40m QCX build, Here is the inside of the case, see the speaker and its amp board, borrowed 5v from the gps socket for it, It came from a Dell Optiplex. It is wired

Just a note to mention that QCX #928 40M arrived on Dec 2. I have #625 80M all built except I haven't wound the toroids yet. That means it's been a week since I did anything on #625. I'm doing my best