Actually I wondered that myself Geoff. The filter is stamped "282" and "48054"
on the top of the crystals.
Keith W8GX
On Jul 6, 2011, at 1:02 AM, geoffrey mendelson wrote:
>
> On Jul 6, 2011, at 7:52 AM, Keith Hamilton wrote:
>
>> Actually I am trying to reconcile the differences between the center
>> frequency of the 500 Hz filter and the 250 Hz filter, both in the
>> 6.3 mHz PB IF. The center frequencies should be the same -( 6.299250
>> I think) regardless of the PBT control setting (11 or 1 o'clock) or
>> the 9 mHz filter in use (I was using the 2.4 hz filter in the 9mhz
>> IF at the time.) Since the center frequencies are not the same, (I
>> must make a frequency adjustment to obtain maximum signal strength)
>> I wanted to know if I can adjust the center frequency of my 250 hz
>> filter or is the filter just too old and drifted. I would also like
>> to know if others have experienced this discrepancy between two
>> filters installed in their radio. Is it common for the older Ten Tec
>> filters to go off frequency?
>> Thanks! Keith W8GX
>
>
> Do you have an RTTY (as opposed to CW) filter?
>
> Geoff.
>
>
> --
> Geoffrey S. Mendelson, N3OWJ/4X1GM
> Making your enemy reliant on software you support is the best revenge.
>
>
>
>
>
>
>
>
>
>
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