Posted by Damir [ 213.202.86.38 ] on March 31, 2006 at 05:54:55:

In Reply to: Re: Excellent! posted by 2wo on March 30, 2006 at 22:17:19:

Hi, I tried D3a only triode connected, with resistive and CCS loads. Good sound and high amplification, but large input capacitance (Part 9).
I planned pentode connection too, basically P. Millett`s OP (in his large pentodes test) - Ua=Ug2 = 150V, Ia/Ig2 = 20/6mA. Then Ra=8k2/10W and Rg2=27k/2W, bypassed with 4µ7/450V and referenced to cathode, Rk=51R, unbypassed; B+ around 310V. But, I found trioded E180F/CCS combination and stopped with experiments... Especially, IMO - high impedance out drivers and grid choke load aren`t that reccomendable.
Hey, you can always "borrow" CCS from "Guinevere" and try it...

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