I've been picking through the jonque boxe gathering parts for an exciter. I'm going with the proven "Longfeller" design with 6AG7 and 6V6 which should do nicely for driving the 813. I noticed there is a .005 capacitor in the output of the oscillator. I have a .002 and .003 micas I can parallel, but while scrounging I came across several tubular plastic jobs with a stripe on one end and am curious. I considered using this Cornell Dubilier PM6D47 in place of the micas. It's .0047 at 600 volts. Close enough. Question is which would make the best coupler? I'm guessing the micas. But my real question is what is the significance of that stripe? If it was used in any circuit, especially RF, I'm guessing the striped-end would be output or does it make a difference?
I wouldn't use the .005 paper cap in the oscillator. Use one of the micas you have if they are any good. You don't need 5000pfd as a coupling cap in a RF circuit. 1000pfd is more than enough (.001).
Fred