3CPX1500A7 full output pull is around $300.
I still wouldnt make the change unless I had 4000-4200VDC under load
available.
In that case Id rather use a YC-156 pull for around the same price and
never have to buy a tube again. Or worry about any mistuning.
Carl
KM1H
----- Original Message -----
From: <sccook1@cox.net>
Cc: <amps@contesting.com>
Sent: Wednesday, January 21, 2009 12:21 PM
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
>> >
>> >
>> > _______________________________________________
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>> > Amps@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/amps
>> >
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