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@optonline.net>
To: "Discussion of Ten-Tec Equipment" <tentec@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@arrl.net>
>>To: <tentec@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@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>>
>>>
>>>
>>
>>
>>_______________________________________________
>>TenTec mailing list
>>TenTec@contesting.com
>>http://lists.contesting.com/mailman/listinfo/tentec
>>
>>
>>
>
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