I really enjoyed your review, Mark.
I have watched a few of your other videos too, great work. Will watch more when I get time.
Please accept my condolences for your brother and use his meter with pride!
The TX1 and TX3 became the Fluke 183 and 185 respectively.
Excellent meters, very large display. We used to have some of the TX1s where I used to work; my only real complaint is having to push a button to toggle between AC and DC. I do prefer Fluke's method of using the rotary switch for this purpose.
In answer to BillGeo, the 77IV and 177 are good meters, certainly more general-purpose than the TX1/3.
I really don't see the point in the 77IV's existence; one may as well just buy a 177.