[ICOM] IC-765 CW Center Frequency

[Billy Cox]

You can adjust that on RX, using the CW PITCH CONTROL, so 
it is NOT a fixed value ... that is also why there were
several "mods" offered <look at the other PDF link> so that
the RX sidetone and the TX sidetone would "track" ... stock
the 765 TX PITCH is FIXED at 700 ... so the mods allowed it 
to be set to whatever, be it higher or lower to match the
actual selected RX PITCH.

Perhaps a better way to answer this is the TX PITCH is
FIXED at 700 Hz ... while the RX PITCH has a RANGE that
is both lower and higher, I would guess by +/- 500 Hz.

Page 6-4 mentions adjusting C307 to 9.009900 and with the
IF freq stated at 9.0106 ... that's a delta of 700 Hz.

Another idea, tune in WWV to ZERO BEAT and then offset it
by 700 Hz on the VFO dial ... now, vary the CW PITCH and
see where it actually centers?

That help?

73 de Billy, AA4NU

-----Original Message-----
>From: Larry Winslow <larry_w at comcast.net>
>I found that value but it's the "CW SIDETONE CIRCUIT (MAIN UNIT)". I'm 
>interested in the frequency which is obtained when a CW signal is 
>received and centered in the passband.
>
>I've scanned the "Service Manual" many times but haven't been able to 
>find what I'm looking for. I suspect it's there but I sure haven't found it.
>
>I'm inclined to believe the value I'm looking for is also 700 hz but 
>that's just a SWAG.
>
>73 - Larry WØNFU
>Seattle
>larry_w at comcast.net
>
>
>Billy Cox wrote:
>> 700 Hz ... per 3-2-13 on page 3-8 of the Service Manual.
>>
>> Another IC765 document you might want to review is:
>>
>> http://www.qsl.net/icom/download/765_108.pdf
>>
>> Hope this helps!
>>
>> 73 de Billy, AA4NU
>>
>> -----Original Message-----
>>   
>>> From: Larry Winslow <larry_w at comcast.net>
>>> I have an external device which I use to detect CW signals. It's 
>>> currently tuned to 1khz - from my Heathkit SB-301 days. I need to know 
>>> the center frequency of my 765 so I can re-tune it.
>>>
>>> Anybody know what it is?
>>>
>>> Thanks
>>> 73 - Larry WØNFU
>>> Seattle
>>> larry_w at comcast.net
>>>     
>> ----
>> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>----
>Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
>Icom Users Net: Sundays, 1700Z, 14.316 MHz
>Icom FAQ: http://www.qsl.net/icom/
>To support QSL/QTH: http://www.qsl.net/donate.html