"Tam/WB2TT" wrote in message
...

Meanwhile, I measured the impedance of a Drake 100W dummy load with and
without the HPF. All readings without the HPF are within Drake spec.

FREQ NO HPF With HPF

4 Mhz 47j2 33j13
7MHz 47j2 55j3
14MHz 47j1 50j7
28MHz 48j2 47j3
50MHz 49j2 54j11
144MHz 53j11 74j36

Everything was connected with UHF adapters, and no coax was used. Ignore the
VHF readings,. as the filter was not built that carefully. Capacitors are
mica (actual values 1000, 560, 1000), and inductors appear to be 68-2
(2.2uH).

If I get a chance later today, I will rewire it into the Pi configuration
with the same inductors.

Tam/WB2TT