Paul,
I've built several 8877 and 4CX1000A/1500B amplifiers and recommend
a "blower" like the on Peter's suggesting also, I've had good results with
the Airflow Developments 45CTL, have a look at:
http://www.airflow.co.uk/indust/single.htm
for some ideas.
Mike G8TIC/M0VHF
----- Original Message -----
From: "Peter Frenning, OZ1PIF" <oz1pif@get2net.dk>
To: "Paul Erickson" <paule@sfu.ca>; "Amps Reflector" <amps@contesting.com>
Sent: Monday, March 04, 2002 9:11 PM
Subject: Re: [Amps] Fans for 4cx1000/1500 question
> Hi Paul,
>
> Only as long as you don't power up the tube - not even the filament! :-)
>
> Seriously you'll need a fan of the "squirrel cage" type and a pressure
tight
> grid compartment through which the fan blows the air, if you want any kind
> of full yield from the tube.
>
> Vy 73 de OZ1PIF, Peter
>
> ********** OZ1PIF **************
> email: oz1pif(no-spam-filler)@get2net.dk
> http://hjem.get2net.dk/oz1pif
> Ph. +45 4619 3239
> Snailmail:
> Peter Frenning
> Ternevej 23
> DK-4130 Viby Sj.
> Denmark
> ***********************************
> ----- Original Message -----
> From: "Paul Erickson" <paule@sfu.ca>
> To: "Amps Reflector" <amps@contesting.com>
> Sent: Monday, March 04, 2002 9:28 PM
> Subject: [Amps] Fans for 4cx1000/1500 question
>
>
> > I need to know how to determine if the following fans will be adequate
> > for an 4cx1000/1500 amp. While I can find the cfm specs, I cannot
> > find the back pressure specs.
> >
> > Can anyone help me out?
> >
> > The fans are made by Augusta Cooling Devices. Model number is 81862.
> > they were bought from Mouser Electronics several years ago.
> >
> > Specs are:
> >
> > 115 VAC
> > 200 ma
> > 19 W
> > 55 cfm
> > 35 dba noise
> >
> >
> > Thanks in advance.
> >
> > --
> > cheers, Paul - VA7NT (ex VE7CQK) - email: paule@sfu.ca
> >
> > "Those who hear not the music, think the dancers mad..."
> >
> >
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> > Amps@contesting.com
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>
>
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