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Valve experts...NOS or not?

OaklandA

Gold Supporting Member
Messages
381
Ok, so I'm getting a PRRI soon and was going through my tube stash to see if I had anything interesting for a tube upgrade or whether I'll order new tubes. While I was doing this a friend came over and saw a pair of what I've always thought were JAN GE 6V6GTA tubes (probably from the late 70's). They had come in a MMB I had once that I later upgraded to JJ's.

Anyway he looks at them and says they are most likely fakes, counterfeits. In fact he's sure that they are Fender tubes that someone had scrubed the Fender stamp off and restamped to look like JAN GE's. You can see traces of scarlet ink on there like Fender uses and make out a small "C" and a "TA" on one tube, but slight hints of ink on the other when held to the light. Further he believes that a real JAN GE would have the bigger base as opposed to the smaller base like these.

He later brought over a Fender 6V6 and while very similar they definitely are not the exact same tube. The plates on the Fender tube have a slightly different shape and are much darker.

What do you guys think? I've heard of counterfeit tubes floating around but I'm not convinced they're fake yet. Not a big deal - I have a genuine set of NOS Hytron brown base or could also go new production Tung Sol.

Apologies in advance for the pictures....I am a lousy photographer....tried my best to get the light right.

Hopefully you can see the "6V6 GTA" as well as the GE "dots":


Another angle trying to capture the ink:


And last, the Fender tube (Chinese?):


Discuss...

Thanks
 

OaklandA

Gold Supporting Member
Messages
381
wow...the pics aren't that great....I'll try and make them bigger and better.

Same tubes, same order:





 

sector9

Member
Messages
572
A fender tube is what ever fender buys and puts their name on. Older fender tubes were GE and RCA, todays stuff is russian and chinese junkola. Do your cbs/hytron tubes have a hole in the guide pin?
 

Mickey Shane

apolitical
Gold Supporting Member
Messages
2,485
Maybe someone will chime in that knows about glass etching from the factories.
 

OaklandA

Gold Supporting Member
Messages
381
A fender tube is what ever fender buys and puts their name on. Older fender tubes were GE and RCA, todays stuff is russian and chinese junkola. Do your cbs/hytron tubes have a hole in the guide pin?
Yes, that is what I'm thinking....that maybe these ARE Fender OEM tubes from the late 70's or early 80's and the ink was rubbed off perhaps.

The Hytrons are marked "JAN CHY 6V6GTY" on the side of the base and have a hole in the base but not actually on the guide pin but next to it. The top of the tube is etched with the stop sign containing "6V6 GTY". The funky old box is dated "3/53".

I got this pair from KCA NOS Tubes sometime back for a 5e3 clone but ended up going in a different direction and have had these in safe keeping since. From what I understand they're excellent tubes. Not sure how they'd be in a PRRI though. Might better in a tweed amp. Maybe one of you guys can offer a suggestion.

Thanks.
 

Timbre Wolf

Hyperspatial Gravity Surfer
Platinum Supporting Member
Messages
10,070
They're genuine, vintage GE-made tubes, as Slider replied. They are not, however, "NOS" tubes if they've been used (which is likely the case).

- Thom
 

sector9

Member
Messages
572
Yes, that is what I'm thinking....that maybe these ARE Fender OEM tubes from the late 70's or early 80's and the ink was rubbed off perhaps.

The Hytrons are marked "JAN CHY 6V6GTY" on the side of the base and have a hole in the base but not actually on the guide pin but next to it. The top of the tube is etched with the stop sign containing "6V6 GTY". The funky old box is dated "3/53".

I got this pair from KCA NOS Tubes sometime back for a 5e3 clone but ended up going in a different direction and have had these in safe keeping since. From what I understand they're excellent tubes. Not sure how they'd be in a PRRI though. Might better in a tweed amp. Maybe one of you guys can offer a suggestion.

Thanks.
I always thought hytron manufactured tubes had a hole in the guide pin, a hytron tube that does not have the hole is a rebranded tube, i've seen rca and sylvanias with hytron stamps.

i have tried the GE coin base tubes before, they sound fine. I don't know why your friend thought they are fake, fake what? fake GE? fake fender? Fender does'nt make tubes.
 

Timbre Wolf

Hyperspatial Gravity Surfer
Platinum Supporting Member
Messages
10,070
I always thought hytron manufactured tubes had a hole in the guide pin, a hytron tube that does not have the hole is a rebranded tube, i've seen rca and sylvanias with hytron stamps.
Hytron was an older brand that Sylvania merged with. Hytron/Sylvania was a common label, and eventually, the Hytron name was dropped - way before those 6V6 were made.

- T
 

OaklandA

Gold Supporting Member
Messages
381
Thanks to everyone for the responses...informative.

Some comments:

First, for clarification sake I hope everyone gets that we're now talking two different sets of tubes here.....the tubes in the original post and a set of NOS Hytrons that I have that I may still use in this amp.

Also, I never said the JAN GE's in the original post were NOS....obviously since I pulled them from an amp they're not.

Why would someone fake a 6V6? I suppose if you got a very cheap Chinese tube, scrubbed off its markings and re-stamped/re-etched it as a JAN GE you could make a $25+ profit on the difference. Do that enough times...

As far as the Hytrons...they are certainly NOS and I'm guessing legit. I've done business with KCA NOS a couple of times and Mike seems to be above board and has a good rep. I believe he may be a TGP member as well (?).

Again, apologies for the pics but here are a few of one of the Hytrons:



The base - the hole is at 2 o'clock (to distinguish from the pins)


The box


Thanks, guys...I may try both sets when the PRRI comes in.
 

OaklandA

Gold Supporting Member
Messages
381
Well, there's the pics of the CBS/Hytrons...no hole in the pin. not sure of the significance of that.
 




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