On 11/29/2025 9:17 PM, Jacques Fortin wrote:
Unless C324 is defective… Ah… maybe you find your “noise” problem also…
Could it be that C324 test open, or intermittent, as a consequence of
silver migration disease ?
Hi Jacques,
The cause of the noise problem is indeed inside T207, but it's not the
capacitor. The primary (L240) is open! Even though it looks to be
the nicest IF transformer ever made, after 70 years anything can fail.
Fortunately it looks like T208 in the R-390A is the same as T-207 in
the R-390, and I have a junker "A" chassis with the RF deck intact that
hopefully will be a replacement. Now I have an incentive to dig out
from today's snowfall so I can get it out of my storage building ;-)
73, Bob W9RAN
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