K&K Audio / Lundahl Transformers

Welcome! Need support, you got it. Or share youe ideas and experiences.

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

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

Ess9018, Diff. Pair and your CCS...will this work ?

Posted by multiblitz on February 11, 2017 at 08:31:55:
I have to admitt that I am using your CCS already in a differential pair for my power amp amd it works very nicely.

I am now think how could I upgrade my unbalancer with your ccs as well:

http://www.tubecad.com/2011/03/22/Unbalancer%20DAC%20Schematic.png

Currently A lm334 is used as current source. I guess your cascode current aources will do better ?

I am a bit careful now how to apply your ccs as

- the ess9018 has a current output and a voltage offset of 1.6V at its pins.
- currently, the lm334 simply makes the tube sink 5mA, no matter how positive the dac already is charging the geid of the tube.
- now your ccs use as well a negative voltage of -20V to work...

...I am not completly sure, if this nebative voltage influences the absolute grid voltage which normally will be set by the dac plus the tube....I dont want to destroy my dac...maybe a bit to cautious, bit I thoight I ask you first.