Home
AudioAsylum Trader
Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

For Sale Ads

FAQ / News / Events

 

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.

You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login


Login to access features only available to registered Asylum Inmates.
    By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username:

The Name that you picked or by default, your email.
Forgot Moniker?

 
 

Examples "Rapper", "Bob W", "joe@aol.com".

Password:    

Forgot Password?

 Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:  
Your Email:  
Subject:  

Message Comments

   

Original Message

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

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

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.