Hsu,
you have probably thought about 3CX1200D7.
That tube has the sane socket as 3-500Z.
Nermin S58DX
----- Original Message -----
From: "Hsu" <hsu4qro@gmail.com>
To: "Val Erwin" <val.erwin@sbcglobal.net>
Cc: <amps@contesting.com>
Sent: Wednesday, January 21, 2009 4:32 PM
Subject: Re: [Amps] 3-500zs to 8877
> 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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