Re: gEDA-user: [OFF] high current amplifier

[Joerg <joergsch@xxxxxxxxxxxxxxxxxxxxx>]

Gene Heskett wrote:
> On Friday 22 May 2009, Joerg wrote:
>> John Doty wrote:
>>> On May 21, 2009, at 6:00 PM, Joerg wrote:
>>>> Chris Albertson wrote:
>>>>
>>>> [...]
>>>>
>>>>> I'm thinking about tube amps that had an output impedance of about 1M
>>>>> ohm that used transformers to drive 8 ohm speakers.  About a 100,000
>>>>> to 1 ratio.
>>>> 1M? What kind of tube was that?
>>> Well, that's a typical plate resistance for a small signal pentode, but
>>>
>>> Power pentodes have lower plate resistance.
>> Small signal, yes. But a 12AX7 won't be enough for a rock concert ;-)
>>
> And its not even a pentode, its a dual triode, designed for phono preamps and 
> such.
> 

Sorry, I meant something like the 6AU6.

-- 
Regards, Joerg

http://www.analogconsultants.com/



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