[R-390] R-390A Replacing HR202 Capacitors

[Jordan Arndt]

Is there a preferred type of cap to replace the .1uF 200v paper caps C256 
and C309 in the heater circuit for HR202, the 17Mc and 200Khz crystal 
oven..?

I originally replaced them with .1uF @ 400v film caps and wondered if film 
caps are appropriate for shunting the noise from the thermal switching.

I'm hearing some "crashing" sounds when I tap the area around HR202, which 
worsens when I tap directly on the top of the oven assembly itself.

Could it be noise from the make and break of the thermal switch itself when 
the oven is tapped like that...?

I've got the RF deck out right now and I'm trying to eliminate any remaining 
issues before I button it all back up...

Thanks in advance for any advice..!

73...Jordan VE6ZT