[Amps] 3-500zs to 8877

[sccook1 at cox.net]

Pair of 3-500Z = $360
Single 8877 = $#@*^&!

-S



---- Hsu <hsu4qro at gmail.com> wrote: 
> 3CX1500D7 is better,
>    It use  same socket as 3-500Z.
>            Hsu
> ----- Original Message ----- 
> From: "Val Erwin" <val.erwin at sbcglobal.net>
> To: <amps at contesting.com>; "Donald Fox" <taurusshoguy at 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 at yahoo.com> wrote:
> > 
> > From: Donald Fox <taurusshoguy at yahoo.com>
> > Subject: [Amps] 3-500zs to 8877
> > To: amps at 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
> > 
> >       
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