[Heathkit] Problem SB-220 (1/2 high voltage)

[km1h]

Check the HV with a good meter such as a Simpson or Triplett.
Usual problem is the 4.7 meg meter multiplier resistors have gone up in 
value. Since you measure 300V across each cap that alone equals 2400V.

Carl
KM1H

----- Original Message ----- 
From: "Gordon Wherry" <wherry398 at mchsi.com>
To: <heathkit at mailman.qth.net>
Sent: Thursday, September 15, 2005 8:30 PM
Subject: [Heathkit] Problem SB-220 (1/2 high voltage)


I have a SB-220 that I only show 1/2 the high voltage 1200v in tune and 
1500v in SSB.  I have changed all the diodes on the board and also the 
Zener.  The resistors on the board all check correctly.  This is being run 
off 120v.  I show between 297vdc and 307vdc on the caps.  I have run out of 
ideas.  Any help would be a blessing.

Thanks
Gordon Wherry (WB0WIV)
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