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SurfGuitar101 Forums » Gear »

Permalink 65 Deluxe Reissue 6V6 Question

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I own a three year old Fender Deluxe Reissue. Upon turning it on tonight, I heard a loud pop. That never happened before. Looking at the two 6V6 power tubes, I noticed that one is burning 3-4 times brighter than the other 6V6 (in the photo it's the left tube).

I shut it down and switched the two tubes. Upon start up, another loud pop. This time the same tube now in the right socket is still lit super bright. These are the original power tubes. I play nearly four or five times a week. Otherwise the amp sounds strong.

Any ideas? Is it time for new 6V6s? This does not look normal.

image

-John

"...enjoy every sandwich." -Warren Zevon

Fender Stratocaster American Pro II
Fender '65 Deluxe Reverb Reissue

I wouldn't start it up again with these tubes. A loud pop is not normal. That fact that it moves with the tube suggests there's an issue with the tube. But I'd still want to make sure there isn't a problem with the power tube circuit sections. Even if there wasn't before, a bad tube can take out components.

It's a bit hard to tell, but is the plate actually red, or is it just the filament that's glowing brighter? If the plate is red, that would indicate that there's too much current flowing from the cathode to anode *plate). But too much filament current is a problem too. You don't want to stress the filmament windings in the power transformer.

A vintage Deluxe Reverb runs pretty high plate voltages on the power tubes. Nominal is around 420-430 VDC. I don't think that changed with the reissue. Design center for a 6V6 is around 350-360 VDC. Tubes used to be designed with a fair amount of margin, but I don't have the same confidence in most modern tubes.

If you have a pair of known good 6V6 tubes, you could try them. If anything pops with them, turn it off immediately and get it to a qualified tech. Or you could just get it to a tech, period.

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The OEM tubes from Fender are hit or miss. I’ve seen some that were great, but not all of them. If the problem follows the tube, then it’s probably just a tube going bad. A minute on a tube tester would probably tell the tale. Unless you are equipped to set bias and have the experience, I’d suggest finding an experienced tech.

The artist formerly known as: Synchro

When Surf Guitar is outlawed only outlaws will play Surf Guitar.

From what I can see, it's not the plate that is glowing, but the element inside of the plate that is glowing hot.

I will order a pair of new 6V6s. But it is my understanding with the installation of new power tubes, the amp would need to be re-biased. And since I'm not comfy trying the bias thing, I'll search for an amp tech.

Any recommendations on a brand of new production 6V6s?

-John

"...enjoy every sandwich." -Warren Zevon

Fender Stratocaster American Pro II
Fender '65 Deluxe Reverb Reissue

jtrollmann wrote:

From what I can see, it's not the plate that is glowing, but the element inside of the plate that is glowing hot.

I will order a pair of new 6V6s. But it is my understanding with the installation of new power tubes, the amp would need to be re-biased. And since I'm not comfy trying the bias thing, I'll search for an amp tech.

Any recommendations on a brand of new production 6V6s?

I’d talk to the tech. The last time I bought a pair of 6V6s, they were JJs, and they sound great to my ear. YMMV.

The artist formerly known as: Synchro

When Surf Guitar is outlawed only outlaws will play Surf Guitar.

Thank you! I'll be contacting amp techs this week. I'm in So Cal (Long Beach - Torrance area), so if anyone can recommend a tech, I'd appreciate it.

-John

"...enjoy every sandwich." -Warren Zevon

Fender Stratocaster American Pro II
Fender '65 Deluxe Reverb Reissue

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