How to Test 6V6 12AX7 tubes Heathkit TT-1 Tube Tester Demo D-lab

A great tester developed by the Heathkit company. This one was their Flagship model. What a legacy Heathkit has left. They are like the Beatles of kit manufactures. I used to spend hours drooling over the newest catalog offerings. My parents always bought me a new kit for Christmas. How excited I was. What would it be this year! I remember my GC-1005 clock, many pieces of test equipment. Man, to re-live those days. I am a product of those experiences. Building Heathkit has allowed me to troubleshoot unknown introduced complex devices with no past knowledge or training. They did not know at the time, that these kits were revolutionary in my generation. I miss those days!

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