[Hallicrafters] Questions for OLD-timers (Hams)

[Jim Brannigan]

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