[Elecraft] On the trail of 30m flat topping

Tue Nov 5 18:12:00 2002

Hi Peter,

Could you try spreading the turns on the toroids in your 30M LPF while
watching the SWR with your Autek analyzer? If they are wound too closely
together it might be possible that the filter is rolling off too quickly. 

73, Eric   WA6HHQ
-------

peter barville wrote:

> I suspect these figures suggest that the filter *is* rolling off too low
> in frequency. Maybe removing a turn from one (or more) of L4/5/6 would
> help?
> 
> I would be grateful if Team Elecraft could comment, and also let me know
> what value inductance L4 and L5/6 should be? It would be fairly easy to
> remove them from the board to check their values, and possibly remove a
> turn.
> --
> 72, peter g3xjs
> 
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