[TenTec] Titan 425 Fan

[Gary Hoffman]

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 at sonic.net>
To: <geraldj at weather.net>; "Discussion of Ten-Tec Equipment" 
<tentec at 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 at weather.net>
> To: <tentec at 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 at 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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