Bob: My memory from 1956 is a bit thin, I was 16 then, but I don't
remember RF inductors wound on "cores", unless you count a plastic coil
form with a 5-pin base to be a "core." Not sure ferrite had been
invented. [:-) The Pi-network was a big deal then, those of us who
couldn't afford the two capacitors used parallel resonant tanks with one
capacitor with link coupling. Interestingly, it did harmonic
suppression and also matched whatever impedance was at the shack end of
the feedline to the plate impedance of the PA. I don't recall anyone
talking about SWR.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 3/23/2020 6:53 PM, Bob McGraw K4TAX wrote:
Regarding connecting a balanced feed line to the transmitter, Fig
14-21 (B) reference is made to do so using a pair of "balun" coils.
This would imply a proper balun would contain two separate coils
existing on two separate cores.
Yes, more interesting trivia.
73
Bob, K4TAX
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
