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Re: Excellent! [message #31868 is a reply to message #31867]

Fri, 31 March 2006 04:54

Damir
Messages: 1005
Registered: May 2009

Illuminati (2nd Degree)

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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[Message index]

		SE 300B Project, Part 11 - The Amplifier Schematic By: Damir on Thu, 30 March 2006 05:38
		Bravo, great work! By: Norris Wilson on Thu, 30 March 2006 10:13
		Re: Bravo, great work! By: Damir on Thu, 30 March 2006 10:41
		Excellent! By: Wayne Parham on Thu, 30 March 2006 10:28
		Re: Excellent! By: Damir on Thu, 30 March 2006 12:25
		Re: Excellent! By: 2wo on Thu, 30 March 2006 21:17
		Re: Excellent! By: Damir on Fri, 31 March 2006 04:54
		Re: Excellent! By: red on Wed, 01 August 2007 03:06

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