Anyone of you Tube gurus own a Dyna Jet 606 tester?

[Curt]

I just picked up a B&K Dyna jet 606 tube checker. There a small unlabeled (with no knob) pot directly below the "quality" push button.
Anyone have a clue what it's for?

Again, there is no silk screening on the tester and no mention of it in the manual.
But, there's a picture of the pot on the front of the manual.

Thanks

[JJGross]

I don't have a B&K, but a Sencore.
On mine right next to the "Life Test" switch is a pot that's used to zero the meter right before you start testing tubes. Could that be what it's for?

Cheers,
- JJ

[Curt]

I don't have a B&K, but a Sencore.
On mine right next to the "Life Test" switch is a pot that's used to zero the meter right before you start testing tubes. Could that be what it's for?

Cheers,
- JJ

I don't think so. But hopefully somebody here will chime in with the answer.