[Heath] [Heathkit] SB-630

Glen Zook gzook at yahoo.com
Sat Nov 14 20:41:05 EST 2015


Minor variations in wire colors were very common due to the transformers being supplied by different companies, etc.
There was a letter, that accompanied certain kits, that indicated that the kit had a different transformer from the one in the instruction manual.  I have that letter included in a partial manual scan. Glen, K9STH 
Website: http://k9sth.net
      From: Alexander N. Gerli <ac1wye at gmail.com>
 To: heath at puck.nether.net 
Cc: heathkit at mailman.qth.net 
 Sent: Saturday, November 14, 2015 7:30 PM
 Subject: [Heathkit] SB-630
   
More...removed the old paralleled 2uF timing caps, and the problem still
exists. I rechecked the Timer Switch wiring, all correct. So, when the
switch is VISUAL, we get the IDENTIFY lights and the Reset doesn't turn
them off, just like before.

There is something odd with T3, the power transformer: in the Manual, there
are two Black primary wires passed through Grommet F in the chassis. In my
chassis, there are TWO twisted pairs through F - a Black-Red pair and a
Black-Green pair. These pairs are soldered to the correct numbered pins of
the terminal strip. The T3 p/n is the correct Heath p/n too, so what's with
this? The schematic shows no Red or Green primary wires on T3.

  
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