From: "David Austin" 
Subject: Re: [drakelist] FS-4


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Hi Herbert,

De-oxit is readily available from a number of hi-fi retailers in the UK =
for cleaning of plugs and sockets (from a quick search on the internet). =
Assume probably in mainland Europe also?

Regards,

David
G4GTP

  ----- Original Message -----=20
  From: Herbert Schulz=20
  To: gmcalmo{at}direcway.com ; drakelist{at}www.zerobeat.net=20
  Sent: Friday, March 12, 2004 4:48 AM
  Subject: Re: [drakelist] FS-4


  Good morning, Gene,=20
  you are absolutely right, this is the point to start with.=20
  In my previous answer, i just assumed without naming it ex-=20
  plicitely, that all the obvious checks and repairs for equipment=20
  of that maturity still have been performed - namely such things=20
  like contact cleaning, looking for and fixing any broken wires,=20
  faulty connectors etc., as this kind of stuff by experience=20
  generally makes up to 50% or more of typical equipment faults.=20

  Keyword DeOxit: As this appears to be a close-to-miracle con-=20
  tact cleaner according to all the reports, i'm looking to ob-=20
  tain some spray cans etc. of this particular brand. Does any-=20
  body know, where in Germany or in Europe i can get some of=20
  them (as far is i know, DeOxit will not ship to end users in=20
  Europe because of the danger for the air transport, that the=20
  explosivity of that material exhibits).=20

  Thanks a lot for all of your comments.=20

  Best regards=20

  Herbert, DG7MCC=20
   =20
   =20
   =20

  Gene McCalmont schrieb:=20

    Hello Dan;=20
    I have had problems with my FS-4 that were similar to the symptoms =
you=20
    describe and the repair was rather simple, which may (or may not) =
mirror=20
    your situation. The FS-4 uses wafer switches similar to those found =
in our=20
    other classic Drake rigs. Over the years, these wafer switches build =
up=20
    oxidation which interferes with the switch's operation. Before I =
would try=20
    any advanced diagnostic/repair techniques as offered by Herbert =
Schulz, I=20
    suggest you clean the wafer switches with DeXoit and see if this =
clears up=20
    your problem. Disassembling the FS-4 is rather easy and all of the=20
    components are readily accessible. Be sure to remove the top inner =
shield to=20
    gain access to the wafer switches under the shield. I use DeXoit =
D-100 in=20
    the small dispenser bottle rather than the spray can, so that I can=20
    concentrate the cleaner on the switch contacts rather than spray =
down the=20
    whole assembly.=20
    If this does not solve your problem, I personally would appreciate =
you and=20
    Herbert posting your discovery and repair techniques to the =
reflector rather=20
    than go private. We can all benefit from Herbert's considerable =
expertise in=20
    this matter.=20

    Best regards;=20
    Gene=20
    W5DDW=20
    Gene McCalmont=20
    270 Oakridge Road=20
    Argyle Texas 76226=20

     -----Original Message-----=20
    Does anyone have any experience with fixing a FS-4? I have one that =
puts out=20
    erratic freq.'s and the 0-5 does not change anything. Any ideas?  =
Dan=20

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