09-20-2016, 12:08 PM
All, I just acquired this tester.
[Image: http://i292.photobucket.com/albums/mm38/...adi13e.jpg]
It was working as advertised. However I noticed that most if not all the tubes I tested were measuring the same. So I took it out of cabinet . Noticed some repairs were done , new caps a couple of new resistors. ETC.. I decided to measure the filament voltage to see if it was correct.. The manual says to use the line adjust to set the meter at the Line adjust position. When I did that the voltage was low. I was using the 5 volt position. It measured around 4.7 volts. When I put in a 5Y3 tube it could barely be set back to the Line adjust position. It measured around 4.6 volts.. could not get it any higher..
Here is schematic..
[Image: http://i292.photobucket.com/albums/mm38/...b9dhwt.jpg]
More to follow..
Skip...
[Image: http://i292.photobucket.com/albums/mm38/...adi13e.jpg]
It was working as advertised. However I noticed that most if not all the tubes I tested were measuring the same. So I took it out of cabinet . Noticed some repairs were done , new caps a couple of new resistors. ETC.. I decided to measure the filament voltage to see if it was correct.. The manual says to use the line adjust to set the meter at the Line adjust position. When I did that the voltage was low. I was using the 5 volt position. It measured around 4.7 volts. When I put in a 5Y3 tube it could barely be set back to the Line adjust position. It measured around 4.6 volts.. could not get it any higher..
Here is schematic..
[Image: http://i292.photobucket.com/albums/mm38/...b9dhwt.jpg]
More to follow..
Skip...
