Wow...you guys are really helpful! Thanks a bunch. I had noticed that
after the rig was on for about an hour, with the antenna disconnected, you
can hear a small oscillation which varied depending on which filter you have
selected. Backing off of the RF gain less than one division stopped it.
When powered off for an hour, and then back on, all is well again. I will
try some of these ideas, but thanks to you, I'll stay away from direct
internal cooling. 73 and Tnx! Darrell W4CX
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Bob McGraw - K4TAX
Sent: Sunday, October 14, 2007 6:24 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Cooling an Omni VI?
And that keeps the inside of the radio cool too.
Bob, K4TAX
----- Original Message -----
From: "Ed Malmgren" <janed@burgoyne.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, October 14, 2007 5:04 PM
Subject: Re: [TenTec] Cooling an Omni VI?
> Another cooling idea for Omnis. I use a 12 inch long threaded rod,
> No. 8
> or
> 10
> with a 3 inch computer fan sandwiched between two nuts at one end of the
> rod. then three inches from the fan put a nut and a one inch washer,
> padded
> with rubber. then use heat shrink on rod the width of heat sink so rod
> don't
> scratch sink. Then another padded washer and a wing nut to sandwich heat
> sink between two padded washers. Put in top slot of the heat sink with
> point of fan down and use another one in series on P S to slow them down.
> Very quiet and the sink just barely gets warm. Ed K7UC
>
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>
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