[R-390] meter repair

[Mark Donaldson]

Hi Ron,

I have disassembled both types with success, the unit
with the threaded collar is indeed as you described, I
use a pair of needle nose pliers as a wrench inserting
one nose into each of the collar slots and then twist
on the handle of the pliers to unthread the collar,
they are seldom torqued in very hard so it should be
easy. On the other meter this is a tough one and has
to be approached very carefully. I use the tip of an
exacto knife to wedge under the meter glass and work
my way around to loosen the glass from the surface it
is attached to, there isn't much room to work the
blade in and some glass chiping can be expected but
will not show up when the bezel is back in place, the
secret to making this work is to use a heat gun on the
the glass to try to break down the adhesive. All the
usual precautions apply use eye protection and don't
inhale radioactive dust. No guaranties that you won't
make the meter worse than when you started but I
assume the meters are already defective so nothing
ventured nothing gained.

Mark WA1QHQ

--- ronald j deeter <k6fsb@juno.com> wrote:
>  hi all-
> the amount of knowledge this group has is
> tremendous. best not to
> reinvent the wheel.......
>  
> I think someone had posted a method of getting
> inside the metres?, I have
> been able to repair metres when i can get into them.
> I have two that i'm
> unable to access. 
> 
> METRE 1. EAC - steel rear/aluminum front bezel and
> Looks like an aluminum
> threaded collar on the rear of metre bezel holding
> the movement case? is
> it, isn't it---- solutions
> 
> METRE  2.  Simpson Bakelite case has 8 screws on
> front of case, looks
> like a rubber(?) gasket under the glass. the glass
> will not pop out with
> pressure on the glass with the loosened movement
> from the rear. it is
> like glued down (too many years of compression).
> Thoughts on this one?
> 
> thanks for any info and help
> Ron
> 
> 
>
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