Can anyone tell me what model Knight/Allied Tube tester I have. The front face is grey and the woodbox is green. I thought is was a model 600 but the tube charts dont match what on the scroll.

Hey Steve

This link has some photos of the Knight line including the 600 . Might be of some use.

http://www.qsl.net/kb7rgg/allied/products/knight_test.html

Ken

Ok, mine looks like the 83 YX 143 but with a wood case. All I know is there a BIG difference between the roll chart and extended tube data charts for the 600.