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Re: [TenTec] Omni six-- heat related IF gain problem

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Omni six-- heat related IF gain problem
From: David McClafferty <ve1adh@yahoo.ca>
Reply-to: ve1adh@accesswave.ca,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 13 Jul 2005 11:49:37 -0400 (EDT)
List-post: <mailto:tentec@contesting.com>
If you're using DC fans, why not put the two in series
instead of using the resistors? I put two 12V fans on
my pegasus heatsink and connected them that way. Very
quiet and they do the job.

Dave, VE1ADH

--- denton <denton@oregontrail.net> wrote:

> What I did to my Omni 6 is pull the speaker and
> install a small muffin fan 
> in its place, as well as a second fan on the rf
> brick heat sink. A 50 ohm 
> resistor in each fans B+ lead keeps the fan noise
> tolerable.
> You may want to try this....
> ----- Original Message ----- 
> From: "Chuck Guenther" <ni0c@earthlink.net>
> To: <tentec@contesting.com>
> Sent: Wednesday, July 13, 2005 6:44 AM
> Subject: [TenTec] Omni six-- heat related IF gain
> problem
> 
> 
> > For several weeks now, I've noticed a pronounced
> reduction in gain of my 
> > Omni 6 after it has been on for a while.  When I
> first turn on the rig, I 
> > get an s meter reading of s-2 to s-3 on antenna
> noise, which degrades to 
> > s-0 after the rig has been on for a while.  The
> attenuation used to take a 
> > few hours to kick in, but this morning I noticed
> fading out in a matter of 
> > minutes.  Has anyone else experienced this?  I
> suspect a problem either on 
> > the 9MHz board or the PBT board.  Any hints would
> be appreciated.
> >
> > Thanks & 73,
> >
> > Chuck  NI0C
> >
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> >
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> >
> > 
> 
> 
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