Main Forums >> Guitar Technology
        Print Thread

Pages: 1

Joined: 25/08/04
Posts: 194
Loc: West Mids
Revalving Engl Head new
      #963040 - 10/01/12 02:08 PM

My Engl fireball has got really really noisy over the past couple of months so I think its time for a revalve. The only problem is my tech has left town and I don't know anyone else I trust or who hasn't messed friends amps up revalve them.

So my question is can I revalve the amp myself easily?
I have changed the tubes in pres and compressors in the past but I have never revalve an amp. It's the biasing that concerns me if I change out the power amp tubes will my head need to be rebiased?

I think while I'm changing the power amp tubes I'm going to also swap out some of the pre tubes to try and get a bit more mid out of the head and a little less bottom end. Its my understanding that I can just change the pre amp tubes without rebiasing is this right?

Its the 60w Engl Fireball E625 head I have,



Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
active member

Joined: 30/10/02
Posts: 1898
Re: Revalving Engl Head new [Re: crazy_ow]
      #963078 - 10/01/12 05:00 PM
Write Engl and find out the type of head that you have, some of them are self biasing so if you buy the same tolerance (matched) tubes you should be ok to revalve yourself. If you need to bias it - you can purchase an amp bias kit and DYI or wait for a tech.


Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top

Joined: 15/11/08
Posts: 5863
Loc: Rochester, UK
Re: Revalving Engl Head [Re: crazy_ow]
      #963090 - 10/01/12 06:30 PM
It's very unlikely that becoming noisy is due to output valves.

Save paradise, Pull up a parking lot!

Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top

Joined: 01/10/05
Posts: 612
Loc: northwest uk
Re: Revalving Engl Head new [Re: crazy_ow]
      #963135 - 10/01/12 10:50 PM
Give Watford valves a call and get their view too............

Post Extras: Print Post   Remind Me!   Notify Moderator     Back to top
Pages: 1

Rate this thread

Jump to

Extra Information
1 registered and 22 anonymous users are browsing this forum.

Moderator:  David Etheridge, James Perrett, zenguitar, Martin Walker, Forum Admin, Hugh Robjohns, Zukan, Frank Eleveld, SOS News Editor,  
Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled
Thread views: 4487

June 2016
On sale now at main newsagents and bookstores (or buy direct from the SOS Web Shop)
SOS current Print Magazine: click here for FULL Contents list
Click image for June 2016
DAW Techniques


Home | Search | News | Current Issue | Tablet Mag | Articles | Forum | Blog | Subscribe | Shop | Readers Ads

Advertise | Information | Privacy Policy | Support | Login Help


Email: Contact SOS

Telephone: +44 (0)1954 789888

Fax: +44 (0)1954 789895

Registered Office: Media House, Trafalgar Way, Bar Hill, Cambridge, CB23 8SQ, United Kingdom.

Sound On Sound Ltd is registered in England and Wales.

Company number: 3015516 VAT number: GB 638 5307 26


We accept the following payment methods in our web Shop:

Pay by PayPal - fast and secure  VISA  MasterCard  Solo  Electron  Maestro (used to be Switch)  

All contents copyright © SOS Publications Group and/or its licensors, 1985-2016. All rights reserved.
The contents of this article are subject to worldwide copyright protection and reproduction in whole or part, whether mechanical or electronic, is expressly forbidden without the prior written consent of the Publishers. Great care has been taken to ensure accuracy in the preparation of this article but neither Sound On Sound Limited nor the publishers can be held responsible for its contents.
The views expressed are those of the contributors and not necessarily those of the publishers.

Web site designed & maintained by PB Associates | SOS | Relative Media