Electra Dyne - Intermittent Volume Issue

Discussion area for Electra Dyne amp.

Moderators: Guitarzan, Grandor, ned, Platypus

Post Reply
mikeller
Mark II
Posts: 99
Joined: Mon Aug 17, 2009 9:28 am

Electra Dyne - Intermittent Volume Issue

Post by mikeller » Sat Jan 10, 2015 11:43 am

A few weeks ago my Dyne head started doing something very odd at a gig. It is most obvious when playing a chord, as the volume starts to die down the amp (for lack of better description) almost sounds like it has a tremolo on it, the volume sputters about.

At first I thought I was a perhaps an issue with the voltage in the venue because it didn't do it when I was at home. But last night, different venue, same thing. Our sound tech plugged the amp into a filtered power supply and that did not help.

It does not do it everytime, but will say of a 3 set show, it was prevalent in the first and second sets, but not at all noticable in the 3rd set.

I am guessing a tube problem - just curious if all think I should look to power tubes or pre-amp first?

Thanks very much
Mike Keller

Mini Rectifier Head
Electra-Dyne Head
Royal Atlantic 27" 1x12 Cabinet

EBMM Guitars


http://www.theseguyslive.com

Hollis
Mark III
Posts: 221
Joined: Wed Jan 04, 2012 9:32 pm

Re: Electra Dyne - Intermittent Volume Issue

Post by Hollis » Sat Jan 10, 2015 5:30 pm

Probably your power tubes. I bet there's one that's shorting. Run the amp in 45 watt mode. Does it do it? If it does, swap the inner 2 power tubes with the outer 2 power tubes. Did that fix it? If so, buy new tubes. If not, take it to a good amp tech.
Electra Dyne 1x12 combo
Deluxe Reverb Reissue
American Deluxe strat
PRS Custom 22

Image

User avatar
elvis
Donating Member
Posts: 2555
Joined: Thu Oct 15, 2009 1:30 pm
Location: San Francisco Bay Area, CA

Re: Electra Dyne - Intermittent Volume Issue

Post by elvis » Sun Jan 11, 2015 12:42 am

I'd bet PI tube. I had a similar experience. It went completely bad in short order.
Mini Rectifier blue LED
Stiletto ACE
F50 Combo
Recto 2x12 Vertical
Recto 2x12 Wedge

mikeller
Mark II
Posts: 99
Joined: Mon Aug 17, 2009 9:28 am

Re: Electra Dyne - Intermittent Volume Issue

Post by mikeller » Sun Jan 11, 2015 10:28 am

Thanks for the suggestions !!

Elvis: which one is the Phase Inverter? I can't tell by looking at tube layout chart in the manual?
Mike Keller

Mini Rectifier Head
Electra-Dyne Head
Royal Atlantic 27" 1x12 Cabinet

EBMM Guitars


http://www.theseguyslive.com

User avatar
elvis
Donating Member
Posts: 2555
Joined: Thu Oct 15, 2009 1:30 pm
Location: San Francisco Bay Area, CA

Re: Electra Dyne - Intermittent Volume Issue

Post by elvis » Sun Jan 11, 2015 2:05 pm

The PI is pretty much always the last (highest number) preamp tube, and may also be called a driver.
Mini Rectifier blue LED
Stiletto ACE
F50 Combo
Recto 2x12 Vertical
Recto 2x12 Wedge

mikeller
Mark II
Posts: 99
Joined: Mon Aug 17, 2009 9:28 am

Re: Electra Dyne - Intermittent Volume Issue

Post by mikeller » Sun Jan 11, 2015 4:02 pm

Thank you - I thought so, appreciate the verification.
Mike Keller

Mini Rectifier Head
Electra-Dyne Head
Royal Atlantic 27" 1x12 Cabinet

EBMM Guitars


http://www.theseguyslive.com

Post Reply