[Hallicrafters] Questions for OLD-timers (Hams)

[Hunter Ellington]

As of April 1, 2008, Hunter Ellington is no longer with our firm.

You may contact him via his new email of hellington at lindquist.com.

If you need further assistance, please contact me by email
christina.meisel at gorrellgiles.com or telephone (303) 996-6595. 


Thanks,
Christina M. Meisel
Legal Assistant/Accounting Manager
(303) 996-6595 Direct
 
Gorrell Giles PC

-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Jim
Brannigan
Sent: Saturday, April 26, 2008 6:35 AM
To: Jim & Karen
Cc: Hallicrafters at mailman.qth.net
Subject: Re: [Hallicrafters] Questions for OLD-timers (Hams)

There is a bit more to it.
The best way to "measure" frequency in  a receiver is to sum the various

oscillators.  Some manufacturers derive the base frequency from the PLL
or 
PTO and "assume" the other frequencies to arrive at a displayed
frequency.
On SSB the final readout is a function of the operators preference.  I
like 
to listen to a high pitched signal, so my readout will be a bit high.
On CW the "offset" will differ from operator to operator.

Sooo if you want to really measure frequency, tune in to a steady
carrier 
and zero beat it.


Jim

> It's also interesting to listen to someone brag about how his or hers
new 
> wiz bang super dupper radio can read the frequency out to 15 decimals.
I 
> hate to mention that the readout depends on how accurate and stable
the 
> time base is that the readout uses.  That"s why most manufacturers
offer a 
> optional and expensive add on time base.  Unless it's locked to one of
the 
> GPS systems no telling how close it is to the correct frequency.
That's 
> one of the differences between the $4.95 and  $200 digital voltmeters.
>
> 73, Jim, W6LLP

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