[HomeBrew] Blower

[Rbethman]

Ed & Ron,

I have two squirrel cage blowers that are intended for 4-1000As.

Yes they make noise, BUT - they do NOT whine.

The airflow and the back pressure requirements inherently dictate that 
you WILL have noise.  BUT there should be NO whine, and 30 seconds wind 
up tells me the blower PROBABLY means the bushings most likely 
DESPERATELY need lubrication.

IF you are NOT using air sockets and chimneys, you can use high speed 
muffin fans.  My LK-500ZB uses one with high and low speed control to 
cool a pair of 3-500Zs.  I've been running this amp for around 4 years 
or so.  The airflow is MORE than adequate - BUT - this amp does NOT use 
air sockets and chimneys.

I ALSO have a "dual" output blower for a 4-1000A.  It is a LOT quieter.  
I'll have to try and get the part number.

The "singles" are Dayton Type 2C610s.  The data plate states, "Oil Every 
6 Months With SAE 20". There are two small holes, one on each end of the 
motor to allow for putting a "couple" drops of oil on EACH bushing.

Bob - N0DGN

Edward B Richards wrote:

>** Please do NOT cross-post messages when posting to HOMEBREW **
>
>I, too, need a blower for the 4-400 X 2 linear amplifier I am building.
>It calls for 28 CFM minimum at .25" of back pressure. Thank you.
>
>73, Ed Richards, K6UUZ
>Simi Valley, California, 93065
>Home of Air Force 1 Pavilion
>
>On Wed, 16 Nov 2005 05:57:02 -0800 solo22 at sbcglobal.net writes:
>  
>
>>** Please do NOT cross-post messages when posting to HOMEBREW **
>>
>>Hi.   I'm trying to find a quiet squirrel cage blower to use in my 
>>homebrew 4-1000A amp.  The one I'm using now takes abt 30 seconds to 
>>
>>wind up to it's 3000 whinny noisey rpm speed.  Anyone out there have 
>>a 
>>nice sized, quiet blower for sale or can put into a place to find a 
>>
>>really nice unit?  Any help much appreciated.  Thanks, Ron K6ZL.
>>_______________________________________________
>>HomeBrew mailing list
>>HomeBrew at mailman.qth.net
>>http://mailman.qth.net/mailman/listinfo/homebrew
>>
>>
>>    
>>
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>  
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-- 
Bob - NØDGN
                       
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