RE: Too low plate R value for a triode ? and CCS substitution?

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Posted by JKT (A) on March 28, 2017 at 12:18:56

In Reply to: RE: Too low plate R value for a triode ? and CCS substitution? posted by Eric Chan on March 28, 2017 at 09:11:40:

Depends on the application. For plate loads it's hard to beat the simplicity of the cascode MOSFET. K&K Audio's kits are very convenient and cheap. Highly recommended. The IXYS MOSFETs that Kevin uses sound better in this application than DN2540s. Do note that these CCSs work best with currents in excess of 10mA and voltages greater than 30V across them. Although I have had good results using them as plate loads for 6SN7s with only 4.5mA. As to the voltage, in addition to the 30V for the CCS you will need to allow for the signal swing. E.g. if you require 20V peak to peak signal swing then you would need 50V across the CCS.

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Follow Ups Full Thread

Topic - Too low plate R value for a triode ? and CCS substitution? - Eric Chan 07:09:42 03/22/17 (12)

RE: Too low plate R value for a triode ? and CCS substitution? - Tre' 21:53:47 03/22/17 (4)

RE: Too low plate R value for a triode ? and CCS substitution? - Eric Chan 23:10:51 03/22/17 (3)

RE: Too low plate R value for a triode ? and CCS substitution? - Tre' 07:59:11 03/23/17 (2)

RE: Too low plate R value for a triode ? and CCS substitution? - dave slagle 10:28:53 03/23/17 (1)

RE: Too low plate R value for a triode ? and CCS substitution? - Tre' 13:25:27 03/23/17 (0)

RE: Too low plate R value for a triode ? and CCS substitution? - Eli Duttman 08:16:41 03/22/17 (6)

RE: Too low plate R value for a triode ? and CCS substitution? - Eric Chan 08:53:34 03/22/17 (5)

RE: Too low plate R value for a triode ? and CCS substitution? - Uncle Mike 09:24:01 03/22/17 (4)

RE: Too low plate R value for a triode ? and CCS substitution? - JKT 10:34:17 03/22/17 (3)

RE: Too low plate R value for a triode ? and CCS substitution? - JKT 14:26:49 03/27/17 (2)

RE: Too low plate R value for a triode ? and CCS substitution? - Eric Chan 09:11:40 03/28/17 (1)

RE: Too low plate R value for a triode ? and CCS substitution? - JKT 03/28/1712:18:56 03/28/17 (0)

Follow Ups

RE: Too low plate R value for a triode ? and CCS substitution? - JKT 03/28/1712:18:56 03/28/17 (0)

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