I learned of this method back in the late sixites and have used my
dishwasher, bathtub and a restaurant commecial washing system over the
years. With everything from collins r390a's to heath.
PLUS in the mid eighties there was a terrible flood in the Marysville/Yuba
City area at which time I owned a radio station there. Flew down and
extracted equipment with help from the staff. Most of it was completely
under water as we had six-seven feet in the building. I washed everything
from satillite receiving equipment (for network stuff) to control room audio
boards, turntables, cart play/record stuff et al. That time I was able to
get into a closed out of business restaurant and used their commercial
dishwasher unit which was conveyer type wash/rinse unit. We were back on
the air within 48 hours from the Restaurant with mostly the equipment
salvaged from the flood. Fortunately the 5 KW transmitter was located on
the second floor of the flooded faclility. So guess I can also attest to
the tek process. Van, K7VS Medford, Oregon
----- Original Message -----
From: <N7KA@comcast.net>
To: "Amps" <amps@contesting.com>
Sent: Wednesday, March 15, 2006 5:32 PM
Subject: [Amps] Washing equipment
> The following is experience, NOT A RECCOMENDATION. I AM NOT LIABLE FOR
> ANYONES PROBLEMS.
>
> Years ago, the 1960s. I washed MANY Tektronix scopes as a normal routine
> for a complete service, both at the factory in Beaverton, OR and in a
> mobile lab (Mobilescope in S. Calif). I do not remember losing a scope to
> water or moisture in that time.
>
> I do not remember the chemical solution that was used or the
> concentration. I do know that I did not do an immersion, instead used
> water under pressure ala the car wash.
>
> The scope were blown dry with air as much as possible and placed in an
> oven to dry for about 24 hours. AND YES, I GOT QUITE WET AT TIMES.
>
> During the wash process CARE was taken to NOT direct water at the bottom
> of the power transformer (it had holes not always filled with terminals).
> Tubes were removed prior to the wash as well including the CRT.
>
> There are several ham friends of mine who can atest to this method of
> cleaning (W7NI, W7SAO, K6XT, AI7B, I worked with all except K6XT) at the
> factory or in field service.
>
> Todays equipment I am not sure I would do the same. The transformer and
> meters I would definitely remove if I chose to wash anything.
>
> BTW, I lubed switch detents (remember lubriplate?) and used contact
> cleaner as well in the process. You should have seen the the
> transformation from a dirty scope to a like new appearnace. All this was
> done prior to any other service work being performed except for a quick
> power up to determine quote for work to be performed.
>
> Today, wash away AT YOUR OWN RISK, DO NOT IMMERSE, and hope it works for
> you. De-ionized water would be a benefit if available.
>
> 73 de Arne N7KA
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>
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