----- Original Message -----
Sent: Friday, March 12, 2004 5:48
AM
Subject: Re: [drakelist] FS-4
Good morning, Gene,
you are absolutely right, this is the point to start with.
In my previous answer, i just assumed without naming it ex-
plicitely, that all the obvious checks and repairs for equipment
of that maturity still have been performed - namely such things
like contact cleaning, looking for and fixing any broken wires,
faulty connectors etc., as this kind of stuff by experience
generally makes up to 50% or more of typical equipment
faults.
Keyword DeOxit: As this appears to be a close-to-miracle con-
tact cleaner according to all the reports, i'm looking to ob-
tain some spray cans etc. of this particular brand. Does any-
body know, where in Germany or in Europe i can get some of
them (as far is i know, DeOxit will not ship to end users in
Europe because of the danger for the air transport, that the
explosivity of that material exhibits).
Thanks a lot for all of your comments.
Best regards
Herbert, DG7MCC
Gene McCalmont schrieb:
Hello Dan;
I have had problems with my FS-4 that
were similar to the symptoms you
describe and the repair was rather
simple, which may (or may not) mirror
your situation. The FS-4 uses
wafer switches similar to those found in our
other classic Drake rigs.
Over the years, these wafer switches build up
oxidation which interferes
with the switch's operation. Before I would try
any advanced
diagnostic/repair techniques as offered by Herbert Schulz, I
suggest you
clean the wafer switches with DeXoit and see if this clears up
your
problem. Disassembling the FS-4 is rather easy and all of the
components
are readily accessible. Be sure to remove the top inner shield to
gain
access to the wafer switches under the shield. I use DeXoit D-100 in
the
small dispenser bottle rather than the spray can, so that I can
concentrate the cleaner on the switch contacts rather than spray down
the
whole assembly.
If this does not solve your problem, I personally would appreciate you
and
Herbert posting your discovery and repair techniques to the
reflector rather
than go private. We can all benefit from Herbert's
considerable expertise in
this matter.
Best regards;
Gene
W5DDW
Gene McCalmont
270 Oakridge Road
Argyle Texas 76226
-----Original Message-----
Does anyone have any experience with
fixing a FS-4? I have one that puts out
erratic freq.'s and the 0-5 does
not change anything. Any ideas? Dan
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