Today's Message Index:
----------------------
 
     1. 07:46 PM - SPA-400 intercom (Bob Vandegrift)
     2. 08:43 PM - Re: SPA-400 intercom (Doug McNutt)
 
 
 

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Time: 
07:46:37 PM PST US
From: 
Bob Vandegrift <citabriapilot@comcast.net>
Subject: 
SPA-400 intercom
      
      
      
      	I have fried several resistors/diodes (don't ask, lets just say the  
      previous professional approved installation choice of protection had  
      something to do with it) in the unit to the point I can not tell what  
      they are or their values. There is a cluster of 4 passives, a diode,  
      capacitor, ? and ? located just behind the on/off switch on the  
      board.  Anyone out there have access to a schematic or and old unit  
      to help me determine what they are. They will be easy to replace and  
      repair the unit.
      Thanks
      Bob
      
      

Message 2


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Time: 
08:43:52 PM PST US
From: 
Doug McNutt <douglist@macnauchtan.com>
Subject: 
Re: SPA-400 intercom
      
      
      At 22:43 -0400 6/10/07, Bob Vandegrift wrote:
      >	I have fried several resistors/diodes (don't ask, lets just say the  previous
      professional approved installation choice of protection had  something to do
      with it) in the unit to the point I can not tell what  they are or their values.
      There is a cluster of 4 passives, a diode,  capacitor, ? and ? located just
      behind the on/off switch on the  board.  Anyone out there have access to a schematic
      or and old unit  to help me determine what they are. They will be easy
      to replace and  repair the unit.
      >Thanks
      >Bob
      
      
       I have a schematic and installation sheet for a Sigtronics SPA-400. It's pretty
      old - earlier than 1885 or so.
      
      I'll see if I can scan it in the morning but it's not going to be a work of art.
      
      There is no parts layout drawing in the stack. If you can identify some part numbers
      on the PC board I might be able to come up with values.
      
      -- 
      -->  The best programming tool is a soldering iron <--
      
      








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