[GreenKeys] Dovetron adjustment

[COURYHOUSE at aol.com]

Larry - good to know this.....
I need to go through  and  test the ones   that  are  here. Ed#
 
 
In a message dated 9/4/2013 11:07:36 P.M. US Mountain Standard Time,  
telegrapher at q.com writes:

The tuning knobs were showing the wrong frequency when  receiving the 
glamorous 170 cycle 45 baud signals.  The alignment  procedure was ok for setting 
the MARK channel but didn't say anything about  the Space.  What I finally 
figured out was to set the Mark freq,  monitoring it at the center of the 
freq alignment pot with a freq counter, and  setting it for 2755 cycles.  The 
going to the space side i set it for  2925 cycles.  That gave me a 170 cycle 
shift and all the indicators on  the Dovetron are happy it appears.  At 
least i am.  Had to write the  results down on paper so i could see what the 
numbers looked like before it  made sense.  Otherwise setting the mark 750 
cycles above the front dial  reading of 2125 put the frequency at 2875, not 
what the book said,   Trying to set the space freq at 2295 + 750 cycles didn't 
work either.   Best to do the adjustment with a good 170 cycle shift signal 
coming in   cause if the front tuning controls are out of adj, who knows 
what the transmit  side is doing?

Anyway its been a good learning experience.  This  MPC1000 is as close to 
factory condition as you'll ever  find.

Larry
W0OGH


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