K3 crystal filter offsets and diversity receive

[K2QI]

Dear all,

Have a question regarding this item on page 38 of the manual:

"When setting up FLx FRQ, use
the average of the filters' marked offsets as the
value entered for both filters (main and sub). If you
enter different offsets, you'll hear phase
modulation, even if the offsets are very close."

Just to make sure I'm understanding this correctly, if I have two
500Hz 5-pole filters, and one has an offset of -70 and the other is
-75, then the offset number I have to enter is -72.5 for both filters
in order to ensure no phase modulation between the two receivers?

73,
James KC2UEE
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[Eric Swartz - WA6HHQ]

Either -.72 or -.73 is OK. Use the same value for each filter.
73, Eric  WA6HHQ


KC2UEE wrote:

> Dear all,
>
> Have a question regarding this item on page 38 of the manual:
>
> "When setting up FLx FRQ, use
> the average of the filters' marked offsets as the
> value entered for both filters (main and sub). If you
> enter different offsets, you'll hear phase
> modulation, even if the offsets are very close."
>
> Just to make sure I'm understanding this correctly, if I have two
> 500Hz 5-pole filters, and one has an offset of -70 and the other is
> -75, then the offset number I have to enter is -72.5 for both filters
> in order to ensure no phase modulation between the two receivers?
>
> 73,
> James KC2UEE
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>  

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[K2QI]

Great, thank you Eric.

73,
James

On Tue, Feb 10, 2009 at 4:03 PM, Eric Swartz - WA6HHQ, Elecraft
<[hidden email]> wrote:

> Either -.72 or -.73 is OK. Use the same value for each filter.
> 73, Eric  WA6HHQ
>
>
> KC2UEE wrote:
>>
>> Dear all,
>>
>> Have a question regarding this item on page 38 of the manual:
>>
>> "When setting up FLx FRQ, use
>> the average of the filters' marked offsets as the
>> value entered for both filters (main and sub). If you
>> enter different offsets, you'll hear phase
>> modulation, even if the offsets are very close."
>>
>> Just to make sure I'm understanding this correctly, if I have two
>> 500Hz 5-pole filters, and one has an offset of -70 and the other is
>> -75, then the offset number I have to enter is -72.5 for both filters
>> in order to ensure no phase modulation between the two receivers?
>>
>> 73,
>> James KC2UEE
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>

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