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   alt.usenet.kooks      Fans of Usenet trolls, kooks, fuckwits      8,056 messages   

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   Message 7,100 of 8,056   
   jojo to All   
   Re: SUNN Beta Bass   
   13 Nov 25 17:38:08   
   
   XPost: alt.checkmate, alt.transgendered, alt.flame   
   XPost: alt.slack   
   From: f00@0f0.00f   
      
   πŸŒˆπŸ’πŸŒ»πŸŒΊπŸŒΉπŸŒ»πŸ’πŸŒ·πŸŒΊπŸŒˆ Jen πŸŒˆπŸ’πŸŒ»πŸŒΊπŸŒ   
   πŸŒ»πŸ’πŸŒ·πŸŒΊπŸŒˆ D ershmenderde   
   nden...den-den *jazz hands*   
   πŸ’πŸŒ»πŸŒΊπŸŒΉπŸŒ»πŸ’πŸŒ·πŸŒΊπŸΆη¬›πŸŒˆπŸ’πŸŒ»πŸŒΊπŸŒΉπŸŒ»π   
   ’πŸŒ·πŸŒΊπŸŒˆ wrote:   
   > Fixed with 4 dollars worth of parts and $26 worth of my time for a friend   
   > of a friend.  Their gig is on Thursday.   
   >   
   > Initial diagnosis was no sound with input, dead quiet.   
   >   
   > Input signal trace fell flat one hop into the preamp board.   
   >   
   > First look into the preamp board connections showed a healthy -15v rail   
   > but the +15v was only 1.3v.   
   >   
   > Tracked down to Q1 tip29 NPN transistor that drives the +15v rail.  The   
   > compliment PNP Q11 tip30 had a crappy clip-on heatsink which maybe helped   
   > it win the race.  I replaced both with new transistors and tapped two   
   > heatsinks to 8-32 threading and screwed those on with some .   
   >   
   > I will test some more tomorrow and verify that the bias setting is ok,   
   > but luckily, the owner has a backup Ampeg just in case anything cascades   
   > down with new higher +15v rail.   
   >   
   >    
   >    
   >   
      
   how much did you buy the soldering kit for?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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