[R-390] looking around for r390-a

[Paul H. Anderson]

On Sat, 29 Jun 2002, John Kolb wrote:

> On Sat, 29 Jun 2002, Paul H. Anderson wrote:
>
> > But the main point is, after 40 years, they're mostly facing the same
> > problems - leaky audio filter caps, under AF deck electrolytic cap, maybe
> > not so not mechanical filters (recall recent thread about the goo in
> > them).
>
> The mechanical filters with "goo" problems are only a
> particular series of Japanese Kokusai brand filters -
> I haven't seen anyone report problems with decomposing
> foam in Collins filters although there may be problems
> with some of the early Collins filters in rectangular
> cases that used standard rubber O-rings for support.
> None of this applies to the F455N series of filters
> used in the R-390A's.

Buzz wrote a thread awhile back about repairing failed collins filters -
the pictures are his web site:

<http://www.lanset.com/buzz/misc/filter/390Afilter.html>

That is what I was referring to as I have never opened one up myself.
I'm tempted, as I've got a failed one (probably failed for other reasons,
though).

Paul