Tung-Sol ONE (1) 6SN7GTB AT1000 Weak Vacuum Tube T7 tall glass dual triode 1956-1961

This listing is for one (1) Tung Sol-made 6SN7GTB dual triode vacuum tube in the straight-walled glass tube shape. It has a black bakelite octal base, angled black T plate, and top horseshoe or halo getter. Some of our stock is re-labeled or marked with the OEM of Eico, Whelan United. If you're looking for a particular brand, please message right as you order - we pack and ship quickly!

The civilian 6SN7 tubes from Tung Sol have been given "type codes" by Sound by Doc as follows: T1 (pre 1951) GT, medium glass, bottom square getter, parallel ribbed black flat plates with 2 support rods. T2 (1950) rare square mica mouse ears, inward-facing T plates. T3 (1950-2) Mouse ears black T plate. T4 (1952-3) Mouse ears grey T plate. T5 (1953-5) inward-facing grey T plates. T6 (1956) Just like Sylvania "Tall Boy," 2-hole inward-facing black plates. T7 (1956-61) top getter tall glass angled black T plates. T8 (1962) rare medium glass. T9 (1962-6) short glass.

Your tube has been fully tested on a computer-regulated, USA-made Amplitrex AT1000 on Fixed Bias setting with WEAK results. It has also passed shorts and gas tests, but did not meet our requirements for a used, good tube because of weak results in GM or plate current or both. It might work in some circuits, but performance is NOT guaranteed. The tube might have mechanical wear or have the label rubbed off - these are very old! Tubes that test used good or like new (tNOS) are often available in a separate listing. Only tNOS and Used Good tubes are eligible for our 60-day performance guarantee.

OPTIONS (use offer feature in Reverb):

Want a regular white box? $1 extra per tube
Want the test results recorded on your box, too? $3 extra per tube