Re: [IRCA] resistance across matching transformer

["Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>]

> The past couple of days, I noticed that signals on my BUG have
> dropped strength.  In the process of diagnosing the problem, I
> noticed that there is about 12 Kohm resistance across the
> transformer.  The windings on the antenna side and the lead-in are
> supposed to be isolated.  Is this normal?  I am guessing that perhaps
> there is a short somewhere and that I need to re-wind/replace the
> transformer I wound.  Any ideas anyone? I would like get others'
> opinions before I do surgery on the transformer.

Is it dry?  Almost sound like water got in.  Or, nearby lightning made a
short through the core.  Sometimes carbon traces are very hard to find.  If
you can get at it, use of some teflon insulated wire is a good upgrade.  I
use that for all the small gauge windings, and THHN 600v #14 for the ones
with only four or six turns.  I also prefer the physically larger cores like
the FT240.  Is this a usual 9:1 transformer?  5/15 turn ratio?  Or
similar...

Craig Healy
Providence, RI

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