Welcome, Guest. Please login or register.
Did you miss your activation email?
November 23, 2024, 03:07:07 AM
Home Help Search Login Register
News: Ceriatone Forums are up and running!!!
 
Guests please register
Note: If you want to help you can donate to keep the forums alive.



Do you want to advertise on this forum ? Send me a private message.

Amplified Parts
+  Ceriatone Forum
|-+  British Style
| |-+  JCM 800 2203, 2204, 2550, 2555
| | |-+  Ceriatone 2204 Tube chance EL34 to 6550		 « previous next »
Pages: [1] Go Down Print
Author Topic: Ceriatone 2204 Tube chance EL34 to 6550  (Read 5039 times)
Jimmy
Newbie
*
Offline Offline

Posts: 4


View Profile
« on: June 12, 2009, 06:27:56 AM »
Hello!
Does anyone have chanced his Powertubes from EL34 to 6550 Tubes? What resistors do i have to chance? Does anyone have a Layout to show me?
Thanks
Jimmy
Logged
lespaulplayer
Newbie
*
Offline Offline

Posts: 5


View Profile
« Reply #1 on: June 12, 2009, 04:21:23 PM »
This is on Voodoo amp's site;

MARSHALL EL34 to 6550
1.) Change the bias resistor to 47K (located above the bias pot).
2.) Set the bias pot to max (around –38 volts)
3.) Locate the purple feedback wire (that is connected to the 8-ohm speaker tap) and solder it onto the 4-ohm speaker tap.
4.) Install the 6550’s and re-bias the amp.

http://www.voodooamps.com/home/TubeConversions/tabid/118/Default.aspx
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  


Login with username, password and session length

Powered by MySQL Powered by PHP Powered by SMF 1.1.12 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!

CeriaTone Forum is not afiliated with Ceriatone Amplifications. The CeriaTone and name, logo and related trademarks and service marks, owned by CeriaTone. , are registered and/or used in the U.S. and many foreign countries. All other trademarks, service marks, and trade names referenced in this site are the property of their respective owners.