Incidentally, when I worked professionally on noise and vibration reduction
projects.....we used to use vibration and noise
isolating grommets made on purpose for this. I remember EAR as one source
for these.
They used to ship a "sample" case of numerous and various grommets on
request from a potential customer. I still have mine.
No idea if this is still the case. Check it out.
73 de Gary, AA2IZ
----- Original Message -----
From: "Ron Castro" <ronc@sonic.net>
To: <geraldj@weather.net>; "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Sent: Saturday, June 12, 2010 1:58 PM
Subject: Re: [TenTec] Titan 425 Fan
I think with enough sleuth work, you can find a replacement motor, but, the
fan unit, as supplied by TT, was disassembled at the factory and the motor
"floated" on grommets, which tend to get hard and brittle as they age,
hence
the increased noise. Of course, a worn bushing can get 'screechy' and
need
replacing too. The grommets are standard sized and can be purchased at
Radio Shack. I changed out the ones in mine and it was a time-consuming
job! IIRC I had to unsolder the filament voltage wires from the back
connector running to the power supply to remove the fan to work on it.
Getting the manifold back into the stick-on weather seal foam gasket was a
job, too. The weather seal should probably be replaced while you're in
there. Plan on spending at least a whole evening on the project...
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
To: <tentec@contesting.com>
Sent: Saturday, June 12, 2010 10:12 AM
Subject: Re: [TenTec] Titan 425 Fan
It should be practical to fix a motor. If the bearings are bronze,
likely a drop of sewing machine oil will lubricate them. If ball
bearing, getting the oil in is more difficult. If ball bearings most are
common (metric) sizes and are available from places like Fastenall, Baum
Hydraulics, McMaster-Carr, and W.W. Grainger. For that matter a motor
rewinding shop should be able to supply and replace either bronze or
ball bearings. Likely its more cost effective to purchase a blower or
fan of similar ratings from W.W. Grainger. I presume the fan is a
centrifugal fan to get enough air to the tubes, but the 425 manual I
have on this computer doesn't get that detailed. That manual does
recommend opening the box regularly to vacuum out dust and lint. And its
conceivable that a build up of much lint has blocked the blower.
Have you asked TenTec parts if they have a spare fan?
73, Jerry, K0CQ
On 6/12/2010 11:17 AM, k2mme@juno.com wrote:
Hi
My perpetually noisy 425 amplifier fan has finally gone silent. Have yet
to open the box but suspect the bearing have finally gotten tired of
their own voice. If so, what next? Has any one found a suitable
replacement? I know from this site that this is probably not likely.
Anyone have one for sale? I can't believe I'll have to junk the 425 for
lack of a fan.
Howie K2MME
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