On 24.07.2014 18:00, Ackermann, John R wrote:
Just FWIW, the TADD-1 uses transformers to provide DC isolation, but the shield side of the coax goes to ground through a 0.1uF cap. The hope is that this reduces the issue that John's referring to (and which I've seen plenty of times using baluns).
For optimum results with respect to high RF frequencies, I'd expect that you would need this cap to be annular, so that the cable can pass through the middle, and the outside connects to the chassis hole all around. This is like a feedthrough capacitor, except that the wire that goes through the center actually is a coaxial cable.
While feedthrough caps for single wires are common, I haven't seen any for coaxial cables (rigid or semi-rigid cables come to mind). Do they really not exist, and if so why? Or have I failed to look in the right places?
Cheers Stefan _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
