[Hallicrafters] SR-400A on CW

[Don]

Thanks Jim,

I spent an afternoon measuring, calculating, and checking things
and kept coming to the same conclusion. I just couldn't believe
they designed the radio that way, so I kept thinking I was missing
something.

The method you suggest seems to be the only "easy" way to get
the transmit and receive on the same frequency. The calibrator
signal could be used for zero beating and RIT adjustment.

73, Don VE3HUR

On Thu Feb 15 10:59:13 2007 james.liles at comcast.net (Jim Liles) wrote:
> 
> Hi again Don:
> I answered your note at 3:30 or so last night ---- wrong time to think.  =
> I somehow interpreted your note to indicate that you did not like the =
> transmit tone.  Your assessment is correct.  The SR-400A uses the upper =
> sideband crystal for CW carrier and BFO --- same frequency.  You have no =
> choice but to tune to the side.  Over the years, I have not seen any =
> notes or bulletins indicating that there would be a change to resolve =
> this issue.  I have the original assessment notes and wish list =
> regarding the SR-2000 before it was released to the field and no =
> participant spoke of the CW issue.  The SR-400, SR-400A, and SR-2000 are =
> all designed the same way.  You could use the RIT control by zeroing the =
> receive signal and then switching RIT on and adjusting it for pitch.  =
> That would synchronize your transmit frequency with the received signal. =
>  Also, there would be no need to change the settings when tuning other =
> CW stations.   Kindest regards Jim K9AXN