开云体育

Yes and no but mostly yes. the original Bitx used 1n4148 diodes and toroid transformers. The 2N2xx as has been discussed recently also used 1n4148 diodes and toroid transformers as do many other

That is correct.? To be specific:? The schematics (Rev E and Rev F) are in Appendix D of the Manual revision B. Jerry AA6KI

I have also wondered if a double balanced diode ring mixer with the usual ft43-10's will work in place of the modules as they are usually listed. I can make a DBDRM for a few cents compared to

Jerry, I will look at your circuit. One of things was wondering about was whether diode ring mixers would wprk in lieu of the minimodules. I suppose the only group project PCB possible would be from a

Thanks for the new group. Homebrew is by far the most interesting part of the hobby. Currently working on a transceiver. It started on 40m and currently works on 60m. I plan to make it properly

home brewed: http://www.learnmorsecode.com/SWRmeter/index.html

The schematic IS IN the manual.? I know there was some difference to the earlier manual/schematic, I had to update my PCB design during my build. 73, Gary WB6OGD

Hey Gang...I've been selling Stockton Bridges since the cows came home. http://kitsandparts.com/bridge1.4.php Simple and inexpensive...you provide teh meters. 73, DIz, W8DIZ

The Sandford Wattmeter is temporarily discontinued but I believe Kanga UK may have 1 or 2 left (none in the states).? It's a fantastic power meter but does not measure SWR.? The "Oner" Stockton

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