HICKOK 209A HUGE dial VTVM calibration data/help needed.

[Tubejunke]

This rather problem ridden beauty I described turned out to be a simple matter. There are about 4 tubes in these things as opposed to 2 in most any VTVM. One of them that controls the bridge is a 6SN7 and I found out that both sections of the dual triode must be close to the same when tested. The tube I had under most any other application would be fine, but it wasn't balanced. I found one that was close and all of those troubles I mentioned went away.

Then you get to calibrate which is a bit tricky, but well worth the effort. I like the thing so well that I purchased a 203 (I think) on Epray. It is a lot smaller and doesn't bear the super cool huge meter, but the price wasn't bad and the thing has supposedly been checked out and functions as is, so maybe no project like much of the stuff I've gotten there. It's too easy to see these neat looking pieces of test equipment and throw out a bid. Not so neat sometimes when you get them; or you realize that you really don't need them. If it says Hickok on it, I am apt to want it. I love their vintage equipment. They are to test equipment what DuMont was to television!