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Just to clarify (correct me, please, if I'm wrong):? The "RevE" designation refers only to the schematic, not to the manual. Agree--it's an excellent manual. Jerry AA6KI Tucson

I have and use both types.? The resistive bridge has the advantage that the transmitter never sees an SWR above 3:1, even across an open or a dead short, so it's easier on the transmitter.? I break

Thank you for setting up the group.? I find that I learn more by listening than by talking, so I don't usually say too much.? I've learned a lot from this group and hope to see it continue. -Eric

I've built this receiver but had a few changes to Rick's design.? His diplexers were extremely complex and I ended up using a simple diplexer from "Solid State Design for the Radio Amateur"

Graham, your understanding is generally correct as long as it’s not a “derivative work” of Dr. C’s artwork. A simple approach, of course, is to just ask Dr. Campbell if he owns the copyright

Rick Campbell KK7B or if you prefer Dr. Campbell of Portland State University has published much over the years. A number of his designs were available through Kanga USA but sadly the proprietor has

I have the Kanga Kits Stockton bridge and it works well for testing up to 20 W output and down to 1 W. Also has an output for a scope. It is my favorite and I have 3 different SWR/dummy loads. I got

Not same but might be fun: ?SOUNDSCAPE BINAURAL JOE STREET VE3VXO project : http://www.learnmorsecode.com/soundscape/index.html

Ryan, Thanks for setting this up. Jerry / K0ES

I'm intrigued. On the Old Group, I had posted about building a homebrew phasing rig, I was reminded about the R2/T2 from KK7B. Those PDF's are at arrl.org too, and I've downloaded both of them so I

I have been thinking about a similar CW transceiver project using the phase shift design.? If you look at the schematic of the QCX at QRPLabs it uses a QSD with I and Q outputs which can run direct

That article as available on the web at http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/QS03-99-Campbell.pdf Available to anyone. Mike K5ESS Sent: Monday,

New member. Listen quite a bit, talk very little. Frank KB4VU

Being interested in building something a little different, happened on this article while looking for info on IQ detectors. This radio was sold by Kanga as a kit, assume the IP is owned by KK7B and/or

The Stockton bridge is useful for continuous monitoring. In other words, it will tell you if your antenna is taken out or something else is amiss. The resistive bridge cuts your power by 6 dB, so it

Hi all I'm new to the group and new to the world of QRP. I'm just getting my QRP station set up with a QRP-Labs QCX 40 at the heart. For checking SWR on my antenna setup, I'm trying to decide between

I've sometimes seen counters display harmonics. It could be a matter of overloading the counter. Try attenuating the signal to the counter a bit, possibly just be using a very small coupling

During 2017-2018 worked 20 states, France, Bonaire, Cayman Islands using the NC40a set to 1W output.? It was a fun project and a very nice transceiver.

If anyone is interested in NC-40a, I made a folder in the Files section "WB6OGD_NC-40a". Inside you can find the basics of my build, any questions, just ask.. You can get the NC-40a RevE manual that I

Hi Ram, Do you have an oscilloscope? If so look at the waveform from your crystal test oscillator--I bet it's more of a square wave than a sine wave and if so your counter is looking at the stronger