Jump to content
Melissiah

Another Bias Question

Recommended Posts

according to this http://line6.com/supportarchivenew/thread/75238

 

DT25

 

multimeter to DCV 200m

 

AB mode and you should get a reading close to 25.0. If it's off, turn the adjustment screw with a small screwdriver until it is at 25 +- 3

 

 

 

Like one guy in previous post I'd like to try JJ el844 who have 25% less power cause my DT25 is still very loud.

 

Should I bias -25% (18.75) like I read on other amp site or I stay at 25?

 

thanks

  • Downvote 1

Share this post


Link to post
Share on other sites

Your best bet is to contact Eurotubes and ask them.  They are the importer for JJ's and really know their stuff.  

  • Upvote 1

Share this post


Link to post
Share on other sites

Take care as EL844 may not cathode bias correctly in Class A mode. As I recall it may require a resistor swap in that case.

Share this post


Link to post
Share on other sites

Use the specified valves from EH. That's what these amps are designed for.

These amps are not like the all analog amps of the 1960's and 70's. They are

not forgiving of modifications, or even of valves.

 

The difference in the characteristic curve between valve brands can cause problems.

This is not an all analog amp, the digital and analog sections have expectations of

one another. Mess with that and problems occur.

 

Use the specified EH valves.

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...