[TenTec] Mystery filter - Omni

[csturner@kcbx.net]

Good for you!  The 221 was a special version of the 219 designed for a lower center frequency, 
where my ear can dig out signals easier.  I have one of the very first 221 filters here and I find it 
very helpful in high noise situations.  It is the same bandwidth as the 219, 250 Hz, but just a lower
center frequency.  Nice to have both in there.  I use a 500 Hz filter next to my 221.

Clark
WA3JPG

On Mon Nov  7 18:17 , Able2fly at aol.com sent:

>An Omni 6 of mine came with a 219 filter installed  in the 9MHz N1 position 
>and a 221 in  N2.  
> 
>The 219 is the optional sharp cw filter, but what is the 221's  intended 
>purpose? (I like it for pulling weak CW out of QRN)
>