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 actual capacitance is not that
big a deal; it's what I had on hand.
You can find a handy capacitive reactance calculator at
http://www.66pacific.com/calculators/capacitive-reactance-calculator.aspx
73 de Steve, NR4M
On 4/3/2018 9:32 AM, N2TK, Tony wrote:
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 the coupling caps I see values from .01-.2uf. It would seem increasing
the value of the cap reduces the Xc. And for the choke I see values of
100uh-2.5mh. And it seems increasing the value of the choke also increases
Xl.
My application is for 160M and 80M only with receive antennas.
My question - does it really make a difference over the values listed above?
Do all the values offer enough Xc or Xl to not cause any problems? Is there
really a recommended "good" value for the caps and coils? Even 100uh offers
1K ohms at 1.8MHZ and .1uf is .8 ohms.
Still learning.
Tnx
N2TK, Tony
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