[R-390] Urban Legend Cap

[L L bahr]

Hey Wes,  Haven't the boyz told you yet ceramic discs will give you microphonics! That will be the next misinformation given.  Haven't you heard, ceramics won't give you good tone either.  Another good topic will be what type getters your tubes have in them or should you have black or gray plates in the valves!  The way I look at it, if they are good enough for my beloved Hallicrafters S-38, they will be good enough for my R-390s.  

Lee, w0vt

----- Original Message -----
I am a little confused after reading all these posts.  Can someone clarify for me:
1.  The self-healing film capacitors only heal with HV transits?
2.  How many HV transits do bypass capacitors see in a radio over time?
3.  Do self-healing film capacitors have a shorter MTBF than other tyoes?
4.  Is it wise to (or not) to use a High Voltage rated film capacitor in lower voltage circuits (like 1 KV rated in 250 VDC circuit)....basically
     will it have longer MTBF from less voltage?
I just re-capped my SP600 using ceramic discs in the RF deck, but metal film bypass capacitors in the rest of the radio.  Do I need to swap
out the metal film caps with ceramic discs (or metal foil, or???)?
Thanks for your comments.
Wes