- Nov 1, 2007Hello folks,
I have got a Mitsumi polyvaricon capacitor to install in my new homebrew
The model is PVC-22J20TI (obsolete), so there is not any datasheet in the
The problem I have right now is that I don't know which connections of the
to use, so I would be very glad if anyone can help.
This polyvaricon seems to have two stages, one for FM and the other one for
(it was designed for an SW receiver). There are 8 connections, 4 of them
as follows: C1, C2, FC1 and FC2. Is suppose that C1 and C2 belong to the AM
stage and FC1, FC2 to the FM stage.
If you see the main connections side of the box, they are distributed as
Upper part: C1 ----- "Pin 1" ----- C2
Lower part: FC1 --- "Pin 2" ---- FC3
Rotating the condenser 90 degrees to see other side, just above C1 there is
another "Pin 3" and above
C2 another "Pin 4".
I would like to use the capacitor for my tuned loop, so the question is
pins should I use to take advantage of the variable capacitance to tune
the antenna at different frequencies, and also use the maximum capacitance
possible to reach the lowest HF frequencies.
I can take a picture of the Polyvaricon and send it to you if necessary.
Thanks and best 73!
Ismael - EB2CWS - Madrid (Spain).
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