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.

Musician's Friend

Apex Tube Matching

Antique Electronics Supply

Jensen Loudspeakers

Sweetwater

MOD KITS DIY

Yellowjackets Tube Converters

Amplified Parts

Amazon

Guitar Center

WD Music


* 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 / Miscellaneous and Non-Fender Topics / My question about tubes

ninworks
Contributing Member
****

Tennessee

Too Much GAS
Jul 1st, 2017 06:42 AM   Edit   Profile   Print Topic   Search Topic

First of all, I know very little about tubes/valves.

I have a Vox AC15H1TV with the Celestion Alnico Blue speaker. It has Mullard EL84's in it already. They were in it when I bought it used. It has Svetlana 12AX7's in it. A JJ EZ81 and another tube I couldn't find a definitive number on.

Would there be any noticeable sonic difference if I were to change out any of these tubes? The amp sounds really good to me as it is.

I'm not really gigging with the amp so longevity is not really an issue.

Pinetree
Moderator Emeritus
(with many stars)

NW Pennsylvania

Jul 1st, 2017 07:03 AM   Edit   Profile   Print Topic   Search Topic

If it already sounds good then why change it?




littleuch
Contributing Member
**********
*****

Florida

Jul 1st, 2017 07:10 AM   Edit   Profile   Print Topic   Search Topic

A change in tubes has almost always made a noticeable difference to me, especially if changing to a different make. For instance, swapping JJ 6V6's for Tung Sol made a huge difference in my Princeton Reverb II. I like JJ EL84's, but not their 6V6.

But, if it ain't broke...



Peegoo
Contributing Member
**********
**********
******

The rain sounds like

a round of applause
Jul 1st, 2017 12:20 PM   Edit   Profile   Print Topic   Search Topic

There's nothing wrong with taste-testing different tubes to satisfy your curiosity.

The only thing to keep in mind is there's a right way and a wrong way to remove and install tubes. If you get too physical with 'em, you'll stress the sockets and cause the pin contacts to become loose--and that is not good. Be gentle with 'em.

ejm

usa

Jul 1st, 2017 02:53 PM   Edit   Profile   Print Topic   Search Topic

Yes, there might be a noticeable difference.

I assume that you mean in a good way.
There might also be a noticeable difference in a bad way.
Or none at all.

If you haven't done it, and you gig out with this amp, at a minimum I would buy a spare set of tubes. And try them out when you get them to make sure that they actually work.


fitz

Pocono Mountains USA

Wanderin eye and a smokin gun...
Jul 2nd, 2017 02:31 AM   Edit   Profile   Print Topic   Search Topic

I would go ahead and experiment, but honestly the Mullards RI are nice tubes as well as the Svetlana's. I would be in no hurry to replace them.

Cal-Woody

USA/California

Why do I keep fixing things that work?
Jul 2nd, 2017 09:47 AM   Edit   Profile   Print Topic   Search Topic

The only problem I've had is that, although some of my older vintage tubes sound wonderful, in a combo style amp, the longer plate 12AX7's are more prone to becoming microphonic due to vibration. They sound glorious for a short time but have had to go to a more stout, shorter plate style of tubes.
I've had good sound and tone from JJ's (sometimes a smidge darker) and Tung-Sol, if you need to go a shade brighter.
But another tube I like is the Sovtek 12AX7's. These are a rugged and good sounding tube with good distortion characteristics.
So, in a combo style amp, vibration is the enemy and your preamp tubes should be of the shorter plate design and will result in longer life.
Just some food for thought. ......

BbendFender
Contributing Member
**********

American Patriot

About as ordinary as you can get.
Jul 2nd, 2017 08:24 PM   Edit   Profile   Print Topic   Search Topic

Why change? But if you do, change them one at a time.

Bubbalou

USA

THE LOW END OF UPPER TEJAS
Jul 3rd, 2017 11:17 PM   Edit   Profile   Print Topic   Search Topic

"Why change? But if you do, change them one at a time."

Exactly! Change one and make sure it works and doesn't change the sound for the worse. If you do a wholesale change at one time you will have a harder time finding the one or even two that cause a negative effect on the amp

"The only thing to keep in mind is there's a right way and a wrong way to remove and install tubes."

When removing a tube, very gently and slightly rock the tube back and forth while pulling on the tube. When reinstalling make sure no pins are bent and they are inserted in the correct position so as not to mess the tube and tube socket up. DO NOT FORCE

Last, I like Tung Sol 12AX7's and JJ output tubes. And oh how I love an EL84 Amp's tone :)

FDP Forum / Miscellaneous and Non-Fender Topics / My question about tubes




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 © 1999-2017 Fender Discussion Page, LLC   All Rights Reserved