Mercury 1000 Tube Tester Tube Chart Updated 1971 version




For sale is reprint of Mercury 1000 Mutual Conductance Tube tester Tube Chart. 65 pages in total.

Tube chart is 54 pages long, dated July 1970. Also included is 2 page supplement dated July 1970, 2 page  dated December 1970, 3 page Dated March 1971, 4 page dated July 1971. If you own Mercury 1000 tube tester and your chart is old, this book is a must.

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