Pair Matched code, KP, RCA 6SN7GTB 6SN7 tubes, Clear Glass. AT1000 tested

They have bottom D getters.

Tubes were checked for noise, shorts, and microphonics

One of the well known attributes of the Amplitrex AT1000 is the sensitivity it has for gas testing.  Even though the AT1000 shows minor gas it is likely other tube testers will show no gas at all.

Amplitrex AT1000 results.  New tube spec mhos is 2600/2600 at 250 Plate Volts.

Tube Emissions % GM % mhos H-K uA leakage Gas mA

6SN7GTB 111/95 107/100 2800/2600 0/0 .2/.2

6SN7GTB 86/95 96/96 2500/2500 0/0 .2/.0

The tube tester manual says the gas current should be below 1ma.  So it is within the good range.

Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling.

Results are written on the tubes.  These can be easily removed with a moist paper towel.

Domestic purchases can be combined to reduce shipping costs.

International shipping is through the ebay Global Shipping Program.  This program may not combine shipping.  Contact eBay to find out. 

Items usually ship the day after payment is received.