Bob Maser wrote:
> Not only is the 3-500Z a more robust tube than the 8877, the 8877 requires a
> 3 minute warm-up, the circuit for that would be an added complexity.
A bit, but it's just a time delay to prevent keying up before the warm up
73
Roger (K8RI)
> I
> agree with Hsu that the 3CX1200D7 would be a better swap, being instant on
> and using the same socket, and probably not replacement of the blower. You
> would have to change the filament supply but that is easy. I swapped the
> 8877 in my 4K Ultra for the D7 and I haven't regretted it once.
>
> Bob W6TR
> ----- Original Message -----
> From: "DAVE WHITE" <mausoptik@btinternet.com>
> To: "Donald Fox" <taurusshoguy@yahoo.com>; "Robert Morris"
> <robrk@nidhog.net>
> Cc: <amps@contesting.com>
> Sent: Wednesday, January 21, 2009 3:48 PM
> Subject: Re: [Amps] 3-500zs to 8877
>
>
>
>> I'd echo this sentiment. You've got a good, tried and tested amp with
>> robust tubes. Why spend the time and money (and run barefoot whilst you're
>> working on it) simply for a lower drive requirement? I may get shouted
>> down for saying this, but personally I think the 8877 is a more fragile
>> tube than the Good Ol' 3-500.
>>
>> Start a new amp as you collect the parts from junksales and fleamarkets. I
>> think that few people out these know what this stuff is these days so it
>> seems to command lower prices than it once did. Recently at Dayton I had
>> quite a few 1x2 and 2x1 extra class licensees come up to me and ask me
>> "what those things are". They were vacuum variable capacitors!
>>
>> cheers
>>
>> Dave G0OIL
>>
>> --- On Wed, 21/1/09, Robert Morris <robrk@nidhog.net> wrote:
>> From: Robert Morris <robrk@nidhog.net>
>> Subject: Re: [Amps] 3-500zs to 8877
>> To: "Donald Fox" <taurusshoguy@yahoo.com>
>> Cc: amps@contesting.com
>> Date: Wednesday, 21 January, 2009, 3:36 PM
>>
>> Donald Fox wrote:
>>
>>> 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
>>>
>>>
>> I'm of the "if it works, don't fix it crowd". No matter how
>> good you are, you
>> still messed with it. If you have the money for an 8877, start a project
>> to
>> build a complete amp, even single band to start.
>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>>
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>
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