[TenTec] 110 vs 240

[Josh]

Hi Joel.  This is a HOT thread.  Several have ask about the Centaur

fan replacement.  The one I used is the Mouser part #5912-4800X.

57.1 CFM @ 1750 RPM. (www.mouser.com).  I think the key is

1750 RPM, most are 3100.  Works well for me, but less CFM's will

probably work FB too.  As to power, I do not have a good reference.

The 811's were soft when I got the Centaur used.  I run the 572B's at

300 to 500 wts.  If more is needed I go to the Titan III.  The 572B's

are a matched set of 3, Taylor from RF Parts.  Hope this helps.

73 de Josh,  N4VB

----- Original Message ----- 
From: "joel hallas" <jrhallas at optonline.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Monday, March 07, 2005 9:48 AM
Subject: Re: [TenTec] 110 vs 240


> Josh,
>
> Can you please provide the details on the quieter fan?
>
> I'd also be interested in the results you've obtained with the 572s.
> I've seen conflicting stories regarding the benefits and am still
> running with 811As here. Did you take accurate before and after
> measurements? Also wonder what brand 572s you had good luck with?
>
> BTW, I run my Centaur on 230 V for all the reasons described so far. I
> ran a dedicated drop from a 240 V fuse pair to the shack and only power
> the amplifier with it. I see no nasty effects from keying the amp such
> as lights dimming, or change in frequency that I would expect if I ran
> from a shared 115 V drop.
>
> Thanks and 73, Joel, W1ZR
>
> Josh wrote:
>
>>Hi Tim, this is Josh in Alabama,  N4VB.  I made several changes to my
>>Centaur.
>>
>>1..  change out noisy fan...  2... install new 572B's.... 3..Move over to
>>240V.
>>
>>Now it runs much more quiet, cool and more pwr.  I also have a Titan III
>>with
>>
>>same ac plug for both.  73 es DXUPONU,  Josh
>>
>>----- Original Message ----- 
>>From: "Tim _W1WCI" <kb1gfv at arrl.net>
>>To: <tentec at contesting.com>
>>Sent: Sunday, March 06, 2005 6:40 PM
>>Subject: [TenTec] 110 vs 240
>>
>>
>>
>>
>>>Just added 240 volts to the shack.
>>>
>>>I am wondering if rewiring my Centaur for 240 volts would change or
>>>improve performance?
>>>
>>>If so I would love an explanation of the theory behind any improvement
>>>or efficiency.
>>>
>>>Thanks for any help.
>>>
>>>73
>>>Tim
>>>W1WCI
>>>_______________________________________________
>>>TenTec mailing list
>>>TenTec at contesting.com
>>>http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>>
>>>
>>>
>>
>>
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>>TenTec at contesting.com
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>>
>>
>
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