I don't have a direct replacement, but I do have a few (used, carefully
salvaged) Johanson 5501 air variables. The data sheet is at
http://www.johansonmfg.com/Catalog/Air Capacitor.pdf so you can verify
suitability for your oscillator. It's a 1-20 pf unit, not quite the 1-30 pf
range that you asked for, but with a few pf in parallel, might work if you can't
find a better replacement.
In this oscillator, the tempco might be critical, and the data sheet doesn't
spec for the 5501 unit.
Email me if you think you might be able to use it.
--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)
"In theory, there isn't any difference between theory and practice. In
practice, there is." - Yogi Berra
