JJ 6SL7

The JJ 6SL7 valve (tube) is a dual triode with an octal base.

These are premium and tested on specialised digital and analogue testing equipment by Karltone as follows 

• Gain (A)
• Transconductance (gm) 
• Noise (dbv)
• Microphonics
• Emission Quality
• Grid Leakage
• Shorts

Test results are provided with purchase