[Lowfer] TACAMO on 27.2 kHz

[Graham]

Thanks David.

That is the way I would do it too.

so, what are they then - 17.9 or 17.8?    27.2 or 27.3?    22.6 or 22.7?

Not that it is that big a deal, it would just be nice standardize as 
best as possible.

cheers, Graham

On 2014-10-05 10:48, David L. Wilson wrote:
> I use an ICOM R9500 here that is GPS frequency stabilized and use waterfall
> on the audio to measure the frequency.  I always use the center of the
> shift.   MARK vs.  SPACE and usb vs. lsb lead to disagreements in
> convention.
>
> --
> David L. Wilson
>
>> -----Original Message-----
>> From: Lowfer [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of
>> Graham
>> Sent: Sunday, October 05, 2014 10:31 AM
>> To: lowfer at mailman.qth.net
>> Subject: Re: [Lowfer] TACAMO on 27.2 kHz
>>
>> I have too and on my grabber 17.9 looks to be more 17.8 and 22.6 looks to
> be
>> more 22.7. Frequency lists typically show 17.8 and 22.7 so I have adopted.
> I
>> must take a bit of time of check the calibration my calibration.
>>
>> The question then is, what are we considering the "frequency" - the center
>> between MARK and SPACE of the various FSK/MSK transmissions or the
>> MARK or the SPACE frequency
>>
>> cheers, graham ve3gtc
>>
>> On 2014-10-05 10:17, David L. Wilson wrote:
>>>> Kurt, the most common frequency (in my experience) for TACAMO
>>>> transmissions is 17.9 KHz, followed by 27.2, and then by 22.6. There
>>>> are
>>> other
>>>> frequencies they can and do use but from my location in Eastern
>>>> Ontario these are the ones I see most frequently. I have seen
>>>> transmissions on
>>> 31.6
>>>> but that is very rare. The document to which Garry posted a link is a
>>>> good reference.
>>> I always have measured them as 17.8, 22.7, and 27.2.
>>>
>>>
>>>
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