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Re: LF: Can I match 2 frequencies with one loading coil?

To: [email protected]
Subject: Re: LF: Can I match 2 frequencies with one loading coil?
From: DK7FC <[email protected]>
Date: Thu, 28 Jun 2018 18:54:48 +0200
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Hi Chris,

It will depend on your antenna size and the system Q. Just try and see what happens. On RX, mnothing should become damaged. With the coil switched to LF there could be enough signal on MF. As long as e.g. a ferrite transformer in the line is can handle LF, it will also handle MF. Just about a factor 3 in frequency. But you could use further components in the shack to get more signal on MF then, like a parallel L which pulls the residual resonance towards higher frequencies.
Just some spontaneous thoughts.

73, Stefan


Am 28.06.2018 17:18, schrieb Chris Wilson:
Hello  LF'ers and MF'ers

Can I, for RX only, use my single loading coil to match 2 receivers to
my single (LF at the moment) antenna , one on MF and one on LF? I
envisage 2 feedlines to the shack. How important is a 50 Ohm match on
the MF one? If I need a second matching transformer for MF what
toroidal core should I use? Thanks.  2E0ILY







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