8fb1d8c8   
   From: sfjssa@nospam.com   
      
   Thanks Roger   
      
      
      
   "Engineer"  wrote in message   
   news:96590601-c011-4146-aa8a-26be9365e114@k15g2000yqd.googlegroups.com...   
      
   On Oct 2, 10:49 am, Engineer  wrote:   
   > On Oct 2, 9:33 am, "Trailboss"  wrote:> Patrick,   
   >   
   > > Words of wisdom, well said.   
   >   
   > > Would you have any idea why HP would use a 900 volt cap in this ckt?   
   >   
   > > Plate Voltage of the 6AU6 is 110vdc coupled by the .5 micro F to the   
   > > grid of   
   > > 6AQ5.   
   >   
   > > TIA   
   > > Vin   
   >   
   > (snip)   
   >   
   > No idea.  I'd just pick one of the 630 VDC caps to hand... orange drop   
   > or the yellow ones.  I've never had any problem with these as plate to   
   > grid coupling caps.  BTW, don't use ceramics in any audio coupling   
   > capacity (no pun intended!)   
   > Cheers,   
   > Roger   
      
   Sorry, forgot to confirm... use 0.47uF or two 0.22uF caps in parallel,   
   or other such parallel combination - close enough.  My guess is that   
   this one does not affect the oscillator frequency.   
   Cheers,   
   Roger   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)