The Heathkit IT-27 Transistor-Diode Checker

In this video we' take a look at a piece of classic Heathkit test equipment, the IT-27 Transistor-Diode Checker.

[Melw]

Just wanted to say thanks for these Heathkit videos. I have a bunch of Heathkit test gear that I picked up when I lived in silicon valley in California. Your videos are the first place I look for info when I want to know about what I have. Oh your book is on the way. 😁

[hestheMaster]

Fantastic demonstration of how the unit works Jeff.

[manoffaith]

I wish Heathkit was still in business.

[tomcroley]

I have one I picked up at a hamfest in like new condition. It's a quick & handy little tester that takes up little bench space.

[SDsailor]

Have the Heathkit IT- 18 transistor tester that I am trying to learn how to use it.

[eugenetheodore]

Hi Jeff, I have a Heathkit IM-28 that I repaired & it worked fine. However, recently the r x 1 scale stopped working. Do you have any suggestions as to what might be the areas to check? Thank you, Gene.

[uni-byte]

Selenium stack rectifiers have higher forward resistance, not lower.