AM FILTER for SB-Line

[Misic, George J.]

A quick note about this topic:

The other problem is the IF frequency of the SB-Line.  It is 3395 KHz rather
than some lower frequency like 455 KHz.  The bandwidth achieved even with a
double tuned IF transformer is a PERCENTAGE of the operating frequency
[assuming that the Q is fairly constant for both IF frequencies], so the
bandwidth would be about 7.5 times as wide at 3395 KHz, or about 45 KHz if
the BW was 6 KHz at 455 KHz.  With single tuned circuits, it is even wider.
73.

George KE8RN


> > > If you want it that wide, try it without any filter. Just put a
> > small
> > > capacitor across the switch contacts.
> > > Regards,
> > > Ed Richards
> >

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