To: | Langwellen-Reflektor <[email protected]>, "Hans-Albrecht Haffa" <[email protected]> |
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Subject: | LF: Low pass filter 1 kW 136k 472 k what components to choose? |
From: | "Hans-Albrecht Haffa" <[email protected]> |
Date: | Sun, 21 Dec 2014 16:38:16 +0100 |
Importance: | normal |
Reply-to: | [email protected] |
Sender: | [email protected] |
Sensitivity: | Normal |
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 |
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