Heathkit TC-2, tube tester, very good condition, works well and tested, accurate. Tests 4, 5, 6, 7, 8, 9 pin tubes for shorts and quality including: 01A, 1L6. 2A3, 10, 6CA7 (EL34), 6BQ5 (EL84), 12AU7, 50, Western Electric 300B, 5881, 6267, 6550, 6973, 7025, 7027, 7189, 7199, 7247, 7581, 7591, 8417, and KT88. Has original assembly/operation manual, and late, large tube data supplement. Also has directions in manual for determining settings for tubes not contained in the tube chart. The roll chart moves freely and easily, it is easy to set up and very accurate. It is nice cosmetically and has the protective type suitcase with handle. Buy with confidence, see my feedback. Good Listening, SonnY :) These Heathkit testers are very reliable, made and designed in the USA.