>
>
>> I don't think anyone has done any calculations:
>> I used to run a pair of 250TH's in parallel grounded grid in the 60's. I
>> then did not know that it would n0ot work since the mu was only 37 or so.
>> They worked fine driven by my home brew pair of 6146's and my 20A exciter.
>> Now the 833 has a mu of about 35. Indeed you can't operate it at zero
>> bias and the input impedance is higher than 50 ohms and power gain a bit
>> low.
>
>Everyone keeps talking about "mu".
>
>Why?
Because in g-g config., the lower the Mu the harder to drive. Because in
grid-driven config., the higher the Mu, the lower the peak anode current.
In grid-driven linear service high-Mu triodes produce little power. In
my opinion, a real amplifier expert would know this.
>
cheers, Tom.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|