RCA 12AU7 ECC82 6680 Clear Top Tubes, Platinum Matched Pair, Tested, NOS/NIB

Hello – I have a platinum matched pair of RCA 12AU7A ECC82 6680 Clear Top tubes for sale.

These have 17 mm long gray ladder plates and a side getter. They have 1965 and 1966 date codes.

These tubes are said to have excellent sound and it is also said by some that 
the side getter contributes to the low microphonics of this tube. These 
are also said to be among the finest sounding 12AU7's.

TV-7/B test results:110/110 and 110/110.  Minimum is 56.

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 Dan Nelson 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 e-mail me if you have any questions.

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 in the USA is $6.00.  Canadian shipping is $16.00 and international shipping by first class is $20.00.

Your tubes will be carefully packed.

No charge for paypal. 

Please check my feedback and buy with confidence.