[Heath] [Heathkit] SB-104A squirrely VFO?

[Glen Zook]

I haven't been inside the SB-104 LMO.  However, the same problem happens in the other LMOs that Heath used.  There is a permanent fix for this and probably can be applied to the LMO in the SB-104 series.  Here is the URL outlying the fix:


http://nebula.wsimg.com/0900b5e95d5811deaba3db293aa63ae5?AccessKeyId=5DDC3F25F0398F58962E&disposition=0&alloworigin=1


 Glen, K9STH 
Website: http://k9sth.net

      From: Alexander N. Gerli <ac1wye at gmail.com>
 To: heathkit at mailman.qth.net 
Cc: heath at puck.nether.net; heathkit at yahoogroups.com
 Sent: Friday, March 18, 2016 3:47 PM
 Subject: [Heathkit] SB-104A squirrely VFO?
   
This happened to my last '104A. The VFO tunes in a wobbly manner, skipping
here and there. I remember pulling the VFO Assy and opening it, then
cleaning the wiper on the rotor shaft that contacts the stator. I guess
that lube or something gets in there over the years and causes poor
contact. The job's a bit of a pain, but cleaning takes care of the skipping.

Anyone else experience this? I've never built a '104 from scratch, so I
guess the VFO Assy is pre-assembled.

  
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