Donald,
The 250hz filter has an 11.5 db insertion loss compared to the 500hz
filter's 5.5 db. In short, the heard sound from the 500hz filter should be
louder and approximately 2 S units higher than the 250 hz filter.
I had the same issues you describe with a 250 hz filter. I isolated the
problem by soldering a shorting wire across each crystal until the heard
signal strength came way up. I found that one crystal caused the greatest
loss in heard signal strength. I removed the crystal and trailing capacitor
from my filter and I am using it in my Corsair II now. Granted, it does not
have the 250hz width but it does restrict offending signals more than my
500hz filter.
I called TT and was told that they do not stock repair parts for the
filters, nor do they repair the filters. I did not ask the 3rd party
supplier was able to repair theses filters.
Jay
AJ4AY
Mobile, AL
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Donald L. Schliesser
> Sent: Thursday, March 01, 2007 4:43 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] OMNI V 500 hz. filter
>
>
> I have 4 filters in the 6.3 Mhz. IF: 2.4, 1.8, .5, .25. They all work,
> but the 500 hz. has less output than the 250 hz. - even when I adjust
> the PBT and the FADE/BP controls for max gain. Gain is probably 25% or
> so less, but definitely noticeable. Could one of the crystals in the
> filter have drifted? Or be bad? I have tried "exercising" the
> connections by plugging and unplugging the filter per Don Prouty in the
> Ten-Tec service dept. Is this a fixable problem by sending back to
> Ten-Tec? Since their hourly rate is $60, maybe just as well to buy a
> used one for $60-70 including shipping. Anyone have any ideas?
>
> Thanks, Donald K6RV
>
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