[TowerTalk] 160 RX antenna. What kind of choke?
Richard (Rick) Karlquist
richard at karlquist.com
Mon Dec 31 13:40:00 EST 2007
Colman Ahern wrote:
> Can you give some details about the choke which you added to the
> feedline? Ferrite mix, number of turns, size of core? At my
> receive-only location I have a very high level of RFI/EMI to deal with.
> Colman Ahern.
On the loop I recently mentioned, the feedline is coupled to
the loop matching circuit through a MiniCircuits T1-1 transformer.
This gives better feedline isolation that you can get with any
choke that I know of. On the antenna side of the transformer,
there is a matching circuit from 50 ohms to whatever the loop
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