[SBE] FW: Question about a Crown exciter and transmitter, over temperatur...

[Urban, Brian L]

Freon TF by name.  Liquid solvent.  Non flammable, wouldn't conduct HV.  I read of one demo where DuPont put an operating TV (CRT) in a vat of the stuff with no effect on the solvent or the TV


On 8/18/09 11:41 AM, "William Whitt" <billw at betterlifetv.tv> wrote:

I just wanted to say - I've never heard of anyone cleaning with Freon ... till today. What is the attraction to this, vice another cleaning agent? Just curious.

Bill


From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of A9xw at cs.com
Sent: Tuesday, August 18, 2009 7:44 AM
To: sbe at sbe.org
Subject: Re: [SBE] FW: Question about a Crown exciter and transmitter, over temperatur...

Had a similar problem with the same hardware. It was cutting out the 945 Mhz STL signal  Took me a while to find it because when the bldg was open, the room cooled and the problem went away, but after leaving the site it would come back an hour or so later. Clean out the PA2000 RF amps.  I had to pull them out of hte box (careful they are RF hot if the unit is on) and scrub them down with freon to get the embedded dirt off the copper.  The grill filters need reglar cleaning and make sure there is space above and below for circulation. ie don't stack the amp and 100 watt exciter box to box. I added rack fans when I rebuilt the site.

Henry
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--
Brian Urban
Chief Operator
KUT Radio
The University of Texas at Austin
TEL 512-471-1085

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