FDP Home Page / FDP Forum / FAQ's

The FDP is made possible by the following companies and individual members like you.
Please use the links below to show them we value their sponsorship.

Advertise here

Apex Tube Matching

Jensen Loudspeakers

Yellowjackets Tube Converters

MOD KITS DIY

Sweetwater

WD Music

Guitar Center

Musician's Friend

Amplified Parts

Antique Electronics Supply


* God bless America and our men and women in uniform *

* Illegitimi non carborundum! *

If you benefit and learn from the FDP and enjoy our site, please help support us and become a Contributing Member or make a Donation today! The FDP counts on YOU to help keep the site going with an annual contribution. It's quick and easy with PayPal. Please do it TODAY!

Chris Greene, Host & Founder

LOST YOUR PASSWORD?

......................................................................

   
FDP Jam
Calendar
Find musicians
in your area!
  Search the Forums  

FDP Forum / Fender Amps: 1985 - Current / What is internal bias?

jtheissen

Montana

no hitch in my git along yet
Nov 14th, 2017 11:55 AM   Edit   Profile  

My 59 Bassman RI LTD literature says it has internal bias, meaning????? No bias adjustment is needed for a tube swap? Thanks.

surfdog
Contributing Member
*

Lakeside, CA

Jim
Nov 14th, 2017 01:19 PM   Edit   Profile  

Bias adjustment is needed. The BMRI had no bias adjustment. The bias adjustment only applies to the 6L6 power tubes.

carsten

on the rhine

Nov 14th, 2017 02:39 PM   Edit   Profile  

Hi jtheissen!

The early Bassman-Reissues didn´t have bias-pot (internal bias), but I´m almost sure, they incorporated it when the amp was "re(v)amped" into the Bassman LTD.

It is a good idea to have your bias adjusted to the power-tubes you use - and that´s what your bias-pot is for.
The bias-setting determines how "hot" or "cold" your power-tubes work and it has an impact on the sound of your amp, as well as the life-span of your power-tubes.
If it´s set too cold, the tubes will last longer, but your tone may suffer, if it´s set too hot, your tubes may suffer - if it´s set WAY too hot, your tone may suffer, too ;-)

If you don´t want to be bothered with this - I think Fender offers replacement tubes that are selected to suit your amp, so you won´t need to re-bias.

cheers - C.

jtheissen

Montana

no hitch in my git along yet
Nov 14th, 2017 02:52 PM   Edit   Profile  

Thanks, fellas!

FDP Forum / Fender Amps: 1985 - Current / What is internal bias?




Reply to this Topic
Display my email address             Lost your password?
Your Message:
Link Address (URL):
Link Title:




Moderators: Chris Greene  Iron Man  reverendrob  

FDP, LLC Privacy Policy: Your real name, username, and email
are held in confidence and not disclosed to any third parties, sold, or
used for anything other than FDP Forum registration unless you specifically authorize disclosure.

Furtkamp.com 
Internet Application Development

Copyright © 1999-2018 Fender Discussion Page, LLC   All Rights Reserved