Dear OMs,
just a question strait forward: What componnets I should
choose for a low pass filter for 136 kHz and 472 kHz, two
filters to be designed.
136 kHz: Pin abt 1,5 kW
472 kHz: Pin abt 0,5 kW
SWR: s = 1...2,5 when mated, in case of failure more
a five-pole low pass will probably be sufficient.
My Question:
What iron powder cores or air coiles will do it, known or
proofed by experiment? Diameter, marterial grade?
What capacitors? max. Voltage. High voltage caps from Wima
(Ucd=4kV or 8 kV) are not available at distributors, mica
capacitors will hardly fit in capacitiy value or in voltage,
when in my collection.
The calculus of magnetic circuits is not a problem for me,
but it is easier to start with components that will fulfill
the demands.
Waiting to Your kind anwer,
55, Hans-Albrecht
DK 8 ND
