[Elecraft] Characteristic Impedance of Filters

[William M. Spaulding, Sr.]

Hi All,

I'm wondering what the characteristic impedance of the bandpass filters is?
Since the switch impedance when on is probably 40 ohms or so, the filter
impedance must run in the 200 to 300 ohm area to avoid exceptional insertion
loss.

If all of that is true, then the output low pass filters make an impedance
transformation from the 50 ohms at the antenna to the 200 to 300 ohms on the
band pass side, since there are no other impedance altering circuits between
the input/output low pass bank.  Only the switches are there.


I think I need these parameters to solve my power level troubles!

Thanks,

Bill
NA7Y