Class of operation is contingent parameter. In Class B or C service for FM
broadcast, this tube can typically deliver 2600 watts
(See http://www.eimac.com/catalog/168423.htm ).
During my college days as a chief engineer for an FM station in Rockford,
Illinois, I used to service an AEL model FM-2.5K broadcast
transmitter with only one 8877. It's licensed transmitter output power was
2250 watts and ran 7/24 service into an ERI 3-bay
circularly-polarized roto-tillar antenna. This was during the days of the
infamous filament contamination period. I once went
through close to ten 8877s with Richardson Electronics before I found one that
would work. An Eimac engineer by the name of Ken
Atkinson was the only one who believed that the problem was with the tubes and
not the transmitter, or me...the engineer. It was
one of the painful but educational experiences of my life.
-Paul, W9AC
----- Original Message -----
From: "alex" <alex@sandlabs.com>
To: "Steve Katz" <stevek@jmr.com>; <amps@contesting.com>
Sent: Monday, December 03, 2001 7:32 AM
Subject: Re: [AMPS] AL1500
>
> This is interesting... The tube, I understand, can deliver safely only
> 1500W.
> How do you get so much more... And how about cooling... Is the internal
> blower enough at these power levels ?
>
> Alex, N2NNU
>
>
>
>
> ----- Original Message -----
> From: "Steve Katz" <stevek@jmr.com>
> To: "'alex'" <alex@sandlabs.com>; <amps@contesting.com>
> Sent: Monday, December 03, 2001 4:42 PM
> Subject: RE: [AMPS] AL1500
>
>
> >
> > Is that a French ham or a Function key? <yuck>
> >
> >
> > > A friend of mine, an F3... , (has no internet access) wants to know:
> > >
> > > Does anyone know what the AL1500 is _really_ capable and under what
> > > conditions?
> > [Steve Katz] The AL1500 runs a lot of power. Not so much for
> > people using "tetrodes with handles," but more than the amateur legal
> limit,
> > for sure. Had one on the bench churning 2200W carrier power for (yawn)
> > about ten minutes before I decided that was enough garage heating for the
> > day. Besides, my Bird 1200W load was getting rather toasty. I don't
> doubt
> > for a moment that it can run 1500W output continuously (not necessarily in
> > the broadcast sense, but in the amateur sense).
> >
> > WB2WIK/6
> >
> >
> > > I have no experience with it, so perhaps somebody in the group could
> help
> > > him.
> > > TIA, Alex
> > > N2NNU
> > >
> > >
> > >
> > >
> > > --
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> >
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> >
>
>
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