Hello – I have a matched pair of GE 7581A KT-66 tubes for sale. I have several more pairs if you need a quad.
These have gray plates and halo side getters. They were made in 1978 and have matching date codes.
These are NOS testing tubes.
Test results: 5000/65 mA and 5000/64 mA. Min is 3150.
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.
Shipping is $9 in the USA. Canadian shipping is $16.00 and international shipping by first class is $22.00.
Your tubes will be carefully packed.
No charge for paypal.
Please check my feedback and buy with confidence.