Re: Balun works
I bought my first colour TV back in 1970, a 22" NordMende direct import from Germany. It just had its sound IF twiddled, otherwise still German spec., 625 line only of course.
The aerial input was for 240ohms, and I was unsure how to connect it, so I wrote to BBC technical people. They suggested a simple coaxaxial transformer, and attached a sketch. For my channels (group c) a 6-1/4" length of coax was formed into a loop. The feed wire inner was soldered to the inner of the short piece, and the braid to that of the short length. the inner of each end of the loop made the connection into the set's 240 ohm ant. socket.
In the intervening years,with both TVs and Stereo radios, I have used the type shown in the first post, the coaxial loop, and direct connection without any form of balun, and to be honest, I don't think I have ever detected any differences.
Les.
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