[R-390] Repairing mechanical filters

[Tim Shoppa]

G80AD writes:

> Since this is a long winded story which needed pictures I have put a
> draft copy of an account of my experiences on:

 http://www.delphelectronics.co.uk/filter390a/ 

> I would welcome your comments and suggestions for improvements. Think
> of this as a work in progress.

I should also add that a few months ago I predicted that the kind of guy
who could do the work and photograph and describe it fully would also
be a watchmaker :-).

Me, my dad is an amateur horologist, specializing in railroad
pocketwatches but also dablling in other movements.

Tim.