[R-390] Power Transformers

[Don and Diana Cunningham]

Bob,
Fair Radio still shows them on their website for $25, unless they have run
out and haven't fixed the site yet.
73,
Don, WB5HAK
----- Original Message -----
From: "Bob Camp" <ham at cq.nu>
To: "R-390 HF Receiver List" <r-390 at mailman.qth.net>
Sent: Sunday, July 25, 2004 9:42 PM
Subject: [R-390] Power Transformers


> Hi
>
> One of the things that there "are no more of" is the power transformer
> in our favorite radio. Given the way they made these we are unlikely to
> get together and make up a batch of them. Obviously this is not the
> only part in the radio that might be in this category ten or twenty
> years from now. Let's just focus on the power transformer right now.
>
> I have never seen a R-390 with a blown power transformer. How common is
> power transformer failure in these radios? Certainly it is not in the
> top ten or even the top 20 observed failures. That alone is an
> encouraging thing. It is especially encouraging when I compare it to
> the number of computer power supplies I seem to see.
>
> There are things we can do to lengthen the life of the transformers we
> have *if* it's an issue. All of these things have an impact so you
> really don't want to fix one thing only to break another.
>
> So, has anybody ever seen a blown power transformer in one of these
> radios? If so do you have any idea what caused it to fail?
>
> Thanks!
>
> Bob Camp
> KB8TQ
>
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