EL34 setting on tube tester help

[Tone-Freak]

i have a old American tube tester and it does not have EL34's listed on the paper chart for the settings for the tube tester. The guy I got it from told me to use the settings for a 6CA7 tube but when i do all my EL34's show weak and i know this cant be right. Does any one know what tube to cross reference it to on the chart to get a good reading
Thanks

[RussB]

Is your tube tester calibrated?
Has it been refurbished?

If you don't bother to give all the details about your tube tester, how can anyone offer help?

[Tone-Freak]

It has not been refurbished but it has a thing called line adjust to callibrate it where you ajust a knob to zero out the gauge. It is a Electronic insterment company model 625 or EICO 625. It has almost the same settings for the 6CA7's as a 6L6 but there is a setting called shunt and on a 6L6 it is set to 19 and on the 6CA7 it is set to 15. If I leave it the shunt setting on 19 all my EL34's test very good but if I lower it to 15 like it says for a 6CA7 they test weak and not in the green for good. I was told that 6CA7 is the same as EL34 so I used that setting since it is a american tester and does not have EL34 on the paper chart to set the tester with. I took a EL34 out of my marshall that I know is pretty new and it tested weak with the shunt set at 15 for a 6CA7 which is supposedly a EL34. I cant accept that my EL34's are all weak. I tested 6L6's and they all test good some weak but believable as well as my 12Ax7's. So do I go with the 6CA7 setting with the shunt down to 15 from 19 for a 6L6 and believe all my tubes are bad or what do I do. Thanks very much

[samwheat]

Try Roger Kennedy at ..... http://www.alltubetesters.com/" onclick="window.open(this.href);return false;

[kylegansel]

Tone-Freak, I know your post is from a year ago but I picked up an Eico 625 Tube Tester on ebay the other day. I'm noticing the same "shunt" issue. New 12ax7's test good but new 6l6's and el34's test just below week in the "replace" area of the meter. Did you ever find out what the shunt really should be. The chart I ave says it should be 18. Would appreciate anything else you learned. Thanks!! - Kyle

[demonufo]

Haven't seen him in a year. You'd be better off looking up Cedarchoper58 on the Plexi Palace Bulletin Board.
Same guy.

[bobtec]

your tubes are fine the good bad testers do that