[Amps] Fans for 4cx1000/1500 question

[Jim White, K4OJ]

interesting fans - going back to a post of mine a week or two ago...

has anyone tried using and air conditioner as a source for cooling
finals...I notice the referenced page show two inlet models...seems like one
for room air and one for conditioned air would be a nice touch...should the
airco go south there would always be the room air blowing on through...

I am thinking of a situation where the blower mount away from the operating
position and air is forced through ducting and into the inlets of the
amplifiers...

Current on small airco units in the states is around a hundred bucks...is
there an advantage to starting with pre-cooled air?

73,

Jim, K4OJ


----- Original Message -----
From: "Michael J. Tubby B.Sc (Hons) G8TIC" <mike.tubby@thorcom.co.uk>
To: "Peter Frenning, OZ1PIF" <oz1pif@get2net.dk>; "Paul Erickson"
<paule@sfu.ca>; "Amps Reflector" <amps@contesting.com>
Sent: Monday, March 04, 2002 2:12 PM
Subject: Re: [Amps] Fans for 4cx1000/1500 question


> 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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> >
> >
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