[Lincnabby]

Make a reasonable offer. These need to go!

Excellent condition full quad (4) 1950s era Tung Sol 6SN7 GTB tubes.
These are the tall bottle version with shiny black triangle plates. Three have the “D” getters and one has a halo or “O” getter. All are excellent cosmetically and sonically and have undergone real listening tests with a JE Labs preamplifier. I’ve personally used several types of 6SN7 tubes and these are my favorites other than Uber expensive Shuguang Black Treasure CV-181Zs.

NOT the inferior Russian tubes made currently.

All four have been tested on a B&K Dyna Jet 606 tester by a qualified tube technician.
Where 60 is good these test:
87/85
86/87
84/84
83/83
No shorts or emission issues.

Buy all 4 for $85 plus shipping and PayPal fees.

Or buy a pair for $50 per pair plus ship and fees.


I ship right away USPS Priority with insurance and tracking so buy with confidence.

Thanks for looking!
Lincoln
 

[FullRangeMan]

Seems do you mean say these tubes are used.
How many hours of use did these tubes have?

[Lincnabby]

You are correct, Fullrange Man
My estimate is 200-300 hours of use.
As mentioned in my ad, I used these in a quality preamp and never abused them. Always treated carefully.
The average lifespan of a typical 6SN7 tube is approximately 10,000 hours if not abused and with normal plate voltages.
Lots of silver flashing on the tops of my tubes. From what I understand, as they age and lose strength the flashing gets smaller and eventually gets a rainbow hue.
I hope this helps.

[Lincnabby]

Bump with price drop

[Lincnabby]

SOLD