Paul:
As Clarke advised, pay very close attention to the adjustment of the PBT.
A tiny bit off in this adjustment can make a big dif in the apparent
attenuation
of the 250hz filter.
"73" Dub
At 12:09 AM 10/24/2007, you wrote:
>I put in a 219 250 hz filter in the 9 mhz if slot. It replaced a 400 hz
>Inrad filter. I find that it has quite a bit of attenuation (maybe 10db?).
>But it does reduce the QRN a lot. This is on 80 & 160m.
>
>Do others find this or maybe I have a bad filter. And yes I have the jumper
>in the high gain position. And boy does it narrow up the passband.
>
>I have not had time to see if this makes the difference in copying DX in the
>noise or not.
>
>I think that I tried a 221 filter and did not like it for some reason, I
>dont remember. Different center frequency?
>
>Any comments or suggestions?
>
>Thanks
>73 Paul K9OT
>
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--
J. W. (Dub) Thornton K5DUB
Minco, OK.
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