choke/transformer loaded Nuvistors

Joel · 2nd June 2003, 03:18 PM

From looking the data sheets over, it seems like a 6DV4, or a 6CW4 (for more gain, or smaller input signals) for example, would be ideal when loaded with iron. High mu, combined with low Rp - so you would get all the gain (68 in the case of the 6CW4), and still maintain excellent frequency response - something that's impossible with 6SL7's and other oldies.

Does anyone have experience with these micro tubes?

Colt45 · 2nd June 2003, 07:51 PM

Ive got a 6DS4 here somewhere, its pretty close to 6CW4.. ive always wanted to do something with it, but i forget where i put it, and it's socket, and i forget if it was good or not..

but im too ghetto for chokes anyways. i'd use a resistor

Joel · 2nd June 2003, 08:29 PM

Well, you could use a resistor load, but then you'd never get more than half the mu out of it in voltage gain - which then defeats the purpose of using the nuvistor in the 1st place, IMO.

6DS4 is high mu, almost identical to the 6CW4.

2nd June 2003, 03:18 PM	#1
Joel diyAudio Member Join Date: Oct 2002 Location: Brooklyn, NY	choke/transformer loaded Nuvistors From looking the data sheets over, it seems like a 6DV4, or a 6CW4 (for more gain, or smaller input signals) for example, would be ideal when loaded with iron. High mu, combined with low Rp - so you would get all the gain (68 in the case of the 6CW4), and still maintain excellent frequency response - something that's impossible with 6SL7's and other oldies. Does anyone have experience with these micro tubes?

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2nd June 2003, 07:51 PM	#2
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	Ive got a 6DS4 here somewhere, its pretty close to 6CW4.. ive always wanted to do something with it, but i forget where i put it, and it's socket, and i forget if it was good or not.. but im too ghetto for chokes anyways. i'd use a resistor

2nd June 2003, 08:29 PM	#3
Joel diyAudio Member Join Date: Oct 2002 Location: Brooklyn, NY	Well, you could use a resistor load, but then you'd never get more than half the mu out of it in voltage gain - which then defeats the purpose of using the nuvistor in the 1st place, IMO. 6DS4 is high mu, almost identical to the 6CW4.