I am dealing with some pesky rf in control lines to a remote antenna switch. I'm thinking that an RF choke in series and bypass cap to ground on each line would help. My question -- are .1 mfd and 10
Pete: I used 1000 uH chokes in the DC-over-coax feed system for my EWE relay boxes on 160M. The value was cited in several feed designs I researched at that time. I bought conformal coated chokes fro
Pete -- take a look at the following link, which is an applications note I wrote for audio system RF suppression. The chokes described would work quite nicely to suppress common mode current on those
Thanks, Jim - The control cable I'm using is CAT-3 network cable. In the TopTen convention, six of these lines go direct to the band decoder, where they are "sunk" to ground by the decoder. The 7th a
Of more interest might be what the properties of those capacitors and inductors are at HF frequencies. I assume you're not using microwave chip-caps, for instance, so that 0.1 uF cap might well look
used for 13 volts out to the relay box. The .1 caps were suggested by TopTen for best effectiveness at 160, but what I was really unsure of was the inductance of the RF chokes. I'll certainly have a
RFI in an LV system is not actually the problem here, Tom -- what I'm dealing with is RF cross-talk between two TopTen 6-way relay boxes in an SO2R setup. When I bring one 6-way physically close to t
when I bring one 6-way near the control lines of the other. kit, and can get 10-15 turns of wire through each - would this be an appropriate sort of choke to try on the control leads? Maybe. You'll