[R-390] Filters

[quartz55]

I've got some 1/2" hardline.  Wonder if I could cut out enough teflon foam or whatever that dielectric is to use for the filter spacer?  Then how do you keep it from melting when soldering back together?  Or like someone said, use JB Weld.

I've already sent the IF output (16KHz) to an SRA-3 mixer to mix the 455 down to 12KHz and fed it into my soundcard, used 'Dream' to demodulate it.  I made up a 467KHz oscillator to drive the mixer. It seems to work, but is a pain to work with.  I couldn't seem to get the Radio Mondiale to demodulate, but then was not sure I had the signal.

BTW I put the Fluke ohmeter on some of that foam used to put ICs into.  It measures about 2Meg at 1/4" spacing, about 3Meg at 1".  Don't think that's a good solution.