Tube Talk
Home » Tube Talk
![free shipping](https://pentalabs.com/wp-content/uploads/2019/12/east.jpg)
The Magic of Free Shipping: Transforming Your Shopping Experience
Why are Customer Satisfaction and Free Shipping so Important? Customer satisfaction is the name of the game with Penta Laboratories, and one
![load](https://pentalabs.com/wp-content/uploads/2019/12/load.jpg)
Burn Tested
Each vacuum tube is burned-in for a minimum of 48 hours dissipating full power with filament, plate and screen voltages that are
![ramp](https://pentalabs.com/wp-content/uploads/2019/12/ramp.jpg)
About Matched Vacuum Tubes – Matched Pair; Matched Trio; Matched Quad
Vacuum tubes are manufactured to perform in a broad electrical range of based on design characteristics. Because of the variance during manufacturing,