From: sfjssa@nospam.com   
      
   Hi John,   
      
   Just pulled a schematic off of BAMA for an HP 200i.  Should have done this a   
   long time ago, it answered a multitude of my inane dumb questions, there is   
   so much more tech info included in this manual. Including the manufacture   
   reference of the incandescent bulb used for FB. It is a GE 10S6 250v.   
      
   Also that coupling cap from the oscilator to the gain stage, HP part made by   
   Sangamo Electric point five mic 400 vdcw 10%.   
   Looks like Will was right on, must have been a fire sale on 900 vdcw caps   
   that week,   
      
   thanks to all,   
      
   Vin   
      
      
      
      
      
      
      
   .1630$Gu.69@newsfe14.iad...-   
   > > That 10 watt bulb providing FB for the oscillator, where can I source   
   > one,   
   > > I am not sure what voltage it should be, any help appreciated.-   
   >   
   > Usually, this is a 120 volt bulb.   
   >   
   > If you get it wrong, it will either not control the output level of the   
   >   
   > oscillator, or LF distoriton will be too high.   
      
   The lamps used in my HP 200CD are shown as 250 volt, 10 watts (pn   
   2140-0007) in that service manual. The HP 201C was in production at   
   about the same time so it makes sense to use the same lamp if possible.   
      
   The attachment is from a parts catalogue published in 1960, so the time   
   frame looks good. I think RT11 is a 10S6/10-250V, bottom of the list.   
   But don't expect to get one for that price today.   
      
      
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   --   
   John L Stewart   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)