Single 8877 pulls are readily available from several sources - great shape -
They run for lots of years at 1500 watts with 40 to 50 watts of drive =
about $300
Not too bad!
73,
Tim K3LR
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of sccook1@cox.net
Sent: Wednesday, January 21, 2009 11:22 AM
Cc: amps@contesting.com
Subject: Re: [Amps] 3-500zs to 8877
Pair of 3-500Z = $360
Single 8877 = $#@*^&!
-S
---- Hsu <hsu4qro@gmail.com> wrote:
> 3CX1500D7 is better,
> It use same socket as 3-500Z.
> Hsu
> ----- Original Message -----
> From: "Val Erwin" <val.erwin@sbcglobal.net>
> To: <amps@contesting.com>; "Donald Fox" <taurusshoguy@yahoo.com>
> Sent: Wednesday, January 21, 2009 11:23 PM
> Subject: Re: [Amps] 3-500zs to 8877
>
>
> > Hi Donald:
> >
> > A good example of the change you would like to achieve is available by
viewing the Ameritron series of amps. Specifically, compare the AL-82 (2 X
3-500s) to the AL-1500 (single 8877).(You can download the manuals)
> >
> > Both amps use the same power suppply and the same chassis. Despite
owning an AL-1500, I have never explored what they do about the difference
in filament voltages between the two models.
> >
> > These two models of Ameitron amps run very high plate voltage as
compared to say a Heathkit SB-220 or a Henry etc.............This higher
plate voltage is really what is needed to make an 8877 "play".
> >
> > I am currently exploring a similar project: Placing an 8877 in an Alpha
78
> >
> > GL
> >
> > Val a.k.a. W5PUT
> >
> > --- On Wed, 1/21/09, Donald Fox <taurusshoguy@yahoo.com> wrote:
> >
> > From: Donald Fox <taurusshoguy@yahoo.com>
> > Subject: [Amps] 3-500zs to 8877
> > To: amps@contesting.com
> > Date: Wednesday, January 21, 2009, 2:11 PM
> >
> > Gentlemen:
> >
> > Just submitting a quick poll to see what the feeling is about making
the swap
> > from a pair of 3-500s to the almighty 8877.
> >
> > The donor is my very good condx Henry 2K Classic X which I do not want
to
> > butcher. I am aware that the Henry consoles were oem equipped with the
8877 and
> > other tubes.
> >
> > My goal is not for more power, but to enjoy the lower drive requirement
of
> > the 8877 for my IC746.
> >
> > I know that the filament xformer and socket would need to change as
well as
> > reworking the airflow for cooling.
> >
> > So, can the change be done without major mods to the input/output
networks??
> >
> > If not, then I will drop the idea and enjoy it as is. Changing to
another
> > amplifier is not in the budget, and since I have a soft spot for the
80's
> > model Henry consoles, this one is bound to be around as long as I can
afford it.
> >
> > Thanks for your comments pro or con in advance.
> >
> > Don N8ECH
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
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