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
>
>
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