Heathkit Dynamic Tube Checker Model TC-1 in a solid wood carry case with a red bakelite handle made in the USA in the early 1950s. The Heathkit vacuum tube tester powers up and the power light lights, scale needle moves, that was the extent of the testing. All switches and dials move as expected, the power cord is still pliable, however the lead wire is brittle. The wood case is in good condition with a few minor scuffs.
The Heathkit ET 3100 Electronic Design Experimenter labeled on the faceplate as the CIE (Cleveland Institute of Electronics Personal Training Laboratory Model ET-3100 (390-1506)) was made around 1975. The unit is in good cosmetic condition specific to age, when plugged in and turned on the red power light lights, no other testing performed. Sold as used, as a collectible, as is, as shown. Measures 12 11 1/2 x 3 inches at the extremes approximately. A digital copy of the manual can be emailed to you after the purchase.