Hello – I have a matched quad of 1950's GE 6SN7GTA ECC33 tubes for sale.
These tubes test as NOS tubes.
These tubes have gray ladder plates with side mount double bar “D” getters. Date codes are from the 1952, 1953 and 1955.
TV-7/B test results: 105/90, 100/100, 100/100/100 and 95/90. Minimum is 50.
They have also been checked for noise and microphonics in the phono stage of my DIY pre-amp and are dead quiet.
All tubes are tested on my calibrated TV-7/B or on my calibrated Hickok 539C. All of these tubes have been tested for transconductance, shorts, gas, leakage and life. All tubes meet or exceed manufacturer published specifications of transconductance (Gm) for the specified tube type. All tests are tested twice – prior to the listing and prior to shipping.
Please check out my other ad’s on Audiogon.
If you don’t see the tubes you are looking for, please contact me.
Be sure and click on the “other items’ link for more tubes.
I will ship international.
$6 shipping in the USA. Canadian shipping is $18.00 and international shipping by first class is $24.00.
Your tubes will be carefully packed.
No charge for paypal. I also accept money orders and personal checks.
Please check my feedback and buy with confidence.