From: apogosso@tpg.com.au   
      
   Hello,   
      
   In 1960's japanese radio manufacturers (Pioneer, Lafayette and others)   
   started using disc ceramic caps in their radios and tuners-amplifiers. (AM   
   "stereo" dual radio receiver with a stereo amp 2x6BM8 is a trypical   
   example). These caps were placed in abundance for decoupling in the RF   
   stages. I have many of such caps in my junk box.   
      
   These disc ceramic caps can be green (manufacturer TAIYO) or mustard colour   
   (TDK). Diameter varies from 8mm to 18...20mm depending on value and   
   dielectric.   
      
   For example, one of them is marked :   
   .01uFM   
   TAIYO   
      
   Another (smaller):   
   .01uFP   
   TAIYO   
      
   Another:   
   .01MF   
     M   
   TDKE   
      
   I think the letter after the value ("F" or "P") is tolerance. I guess M =   
   +/-20%, and P could  be +100%  / -25% or something like that, suggesting   
   that some are like modern X7R dielectric, others like Z5U dielectric.   
      
   But my question -- what is the vorking voltage of such caps? 250V? 500V?   
   Maybe the letter is not tolerance, but voltage? Can they be used for   
   recapping vintage radios where upon power-up when 5Y3 warms up, the B+   
   voltagee reaches almost 400V?   
      
   Regards,   
   Alex   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)