Sylvania 1-076 arrived!

[jeyurkon]

Originally Posted by bandersen

I wonder if you could use an Eico 944 Yoke tester on it ? Supposedly they can detect a single short.

It would be interesting to try, but I think they'd give the same result. I took a quick look at the manual for the Eico. Both the Eico and the Sencore LC101 test the yoke by measuring the absorbed energy, though by different means, and are sensitive to a 1 turn short. The Sencore does it by forming a resonant tank circuit and pinging it. It then counts the number of oscillations to decay a certain fraction.

The problem is that with an iron wire core the Q is low and the energy absorbed is higher. The results I get with the Sencore are right at the border line. The Eico manual also indicates that you can run into this problem, and in that case you want to compare the reading with an identical yoke. The replacement yoke I have isn't identical, it has a powdered iron or ferrite core which gives you a higher Q.

If I remove the iron wire, then either unit should give me an unambiguous result since the Q should be quite high.

John