Have a question about the values of the choke to keep RF from the relay and the caps for coupling of the signal. In different products I see quite a bit of different values of both components. For th
Being the original "inventor" of this circuitry, I can attest to using 2.5 mh chokes for low bands. For multi band use, I suggest TWO stages at each end, with two chokes, one 2.5 and one 100, as you
Don, Tnx for the feedback and guidance. N2TK, Tony Being the original "inventor" of this circuitry, I can attest to using 2.5 mh chokes for low bands. For multi band use, I suggest TWO stages at each
Hello Tony, I would be more concerned with the current handling capability of the caps. For my full-power transmit 4 squares, I use 4 parallel, .01 uf @ 2kv ceramic caps for the blocking caps. The
Tony, My apologies. I re-read your email and see your dealing with receive only antennas. You may ignore my post, as current/voltage will not be an issue. I had always heard the reactance should be
I have the same interest for a 160/80m relay switchable receive antenna feed design on RG6 and came to the following conclusions (probably better ideas out there). The inductor should have its self r
Grant, How do you measure for self-resonance and how important is it for what I am doing? N2TK, Tony I have the same interest for a 160/80m relay switchable receive antenna feed design on RG6 and cam
Tnx Steve, Yes, receive only. I have separate runs of coax form each antenna. 73, N2TK, Tony Tony, My apologies. I re-read your email and see your dealing with receive only antennas. You may ignore m
At some frequency above SRF the inductor starts to behave more as a capacitor due to its parasitic capacitance. I use a VNWA to measure SRF which has some pitfalls (or the Bourns spec) but for this a
Author: Edward Mccann via TowerTalk <towertalk@contesting.com>
Date: Thu, 5 Apr 2018 08:21:50 -0700
Good Morning: You might want to scan the attached brief article, which addresses some of your points in SRF and Bias-T devices. http://www.ad5x.com/images/Articles/BiasT3amp.pdf 73, EdMcCann AG6CX Se