Replacing EL-34 pair

Talk about tubes and their effect on your tone

Moderators: Guitarzan, Grandor, ned

Post Reply
TStone2
Mark I
Posts: 21
Joined: Tue Apr 22, 2014 10:45 am
Location: South East Lower Michigan

Replacing EL-34 pair

Post by TStone2 » Mon May 05, 2014 12:56 pm

I need to replace a bad tube in my Stiletto Tridant head. Attached is the question: I need to replace the pair.....based on top view of head....

#1-#2 #3-#4 #5-#6. #3 is the bad tube. Do I replace #3 and #4 ?
Mesa Stiletto Trident Stage 1 Head Est:2005-6 P:2009
EVH 5150 EL-34 2-12 Cab Est:2018 P:2019

Mesa Mark 5 90W Head Est:Mid 2018 P:2019
Mesa Recto 4 X 12 Cab V30's P:2009

Fender Combos. Fender and Ibanez Guitars

talltxguy
Donating Member
Posts: 641
Joined: Sun Jul 06, 2008 9:48 am
Location: Central Texas

Re: Replacing EL-34 pair

Post by talltxguy » Mon May 05, 2014 1:16 pm

Not if #3 & #4 are matched tubes and your replacement tube is the same as #3. What kind of tubes are you using and what are they rated? (Mesa yellows, GT #4, Tube Depot #32, etc.)
YOUTUBE: mesafanintexas

TStone2
Mark I
Posts: 21
Joined: Tue Apr 22, 2014 10:45 am
Location: South East Lower Michigan

Re: Replacing EL-34 pair

Post by TStone2 » Mon May 05, 2014 1:43 pm

talltxguy. Spec for the #3 is Mesa EL-34, STR 447, 05 AC Yellow. Pretty sure all the rest are the same color code.

Thanks, TS
Mesa Stiletto Trident Stage 1 Head Est:2005-6 P:2009
EVH 5150 EL-34 2-12 Cab Est:2018 P:2019

Mesa Mark 5 90W Head Est:Mid 2018 P:2019
Mesa Recto 4 X 12 Cab V30's P:2009

Fender Combos. Fender and Ibanez Guitars

TStone2
Mark I
Posts: 21
Joined: Tue Apr 22, 2014 10:45 am
Location: South East Lower Michigan

Re: Replacing EL-34 pair

Post by TStone2 » Tue May 06, 2014 1:22 pm

Last night I swapped out the #3 bad tube to the #4 socket and the #4 to #3 socket, the #3 tube failed to light in the #4 position as well so I'm fairly certain it's the tube.

Any help on which positions (matched pair) to replace (#3 obviously) would be greatly appreciated.
Mesa Stiletto Trident Stage 1 Head Est:2005-6 P:2009
EVH 5150 EL-34 2-12 Cab Est:2018 P:2019

Mesa Mark 5 90W Head Est:Mid 2018 P:2019
Mesa Recto 4 X 12 Cab V30's P:2009

Fender Combos. Fender and Ibanez Guitars

User avatar
Authorized Boogie
Mark IV
Posts: 685
Joined: Wed Sep 08, 2010 4:12 pm
Location: Petaluma, California
Contact:

Re: Replacing EL-34 pair

Post by Authorized Boogie » Tue May 06, 2014 3:09 pm

The tubes are paired in the following manner: 1&6, 2&5, 3&4

Thanks!
MESA/Boogie - Product Specialist/Customer Service - http://www.mesaboogie.com/support/index.html

TStone2
Mark I
Posts: 21
Joined: Tue Apr 22, 2014 10:45 am
Location: South East Lower Michigan

Re: Replacing EL-34 pair

Post by TStone2 » Wed May 07, 2014 10:13 am

Authorized Boogie wrote:The tubes are paired in the following manner: 1&6, 2&5, 3&4

Thanks!
Thanks for the info, AB! Time to go buy that pair.

TS
Mesa Stiletto Trident Stage 1 Head Est:2005-6 P:2009
EVH 5150 EL-34 2-12 Cab Est:2018 P:2019

Mesa Mark 5 90W Head Est:Mid 2018 P:2019
Mesa Recto 4 X 12 Cab V30's P:2009

Fender Combos. Fender and Ibanez Guitars

Post Reply