Old tungsol 6550

AndyPanda

New Member

• Mar 10, 2015

• #1

I just picked up a 50's amp that looks like it's barely been used - felt like I was the first person to ever look inside. It has these really old Tung Sol 6550 tubes - but what's the deal with the glue around the base? Has anyone seen these before?

 

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Sam Cogley

Last of the Time Lords

Subscriber

• Mar 10, 2015

• #2

I have no idea, but those are the most desirable Tung-Sol 6550s.

 

analog addict

Glory or Death!

Subscriber

• Mar 11, 2015

• #3

Sam Cogley said:

I have no idea, but those are the most desirable Tung-Sol 6550s.

Click to expand...

smooth black plates with no holes :thmbsp:

 

Dukiedook

Super Member

• Mar 11, 2015

• #4

They look like grey plates to me but your pic kinda washes out the color. Someone added that glue after the fact because the bases may have separated.

 

U

UnGrounded

Well-Known Member

• Mar 11, 2015

• #5

Yeah, very desirable black plates.

The glue is strange. I've seen zillions of tubes but none with glue around the base. I have no doubt that it was added post-factory. Those types of bases are very firmly affixed and I would be very surprised if they separated.

My guess is that the bases are fine and someone added the glue as a precaution.

 

Tom Bavis

Audiophool

Subscriber

• Mar 11, 2015

• #6

Any cracks in the metal ring? Some octal tubes were made that way in the '40s and they're prone to splitting and cracking - I hope T-S had that fixed by the '50's...