How to Date MIJ TS-9s?

[RobB]

Found a coupla very early 80s Tubescreamers in the estate sale pile. Any idea on how to date the serial numbers?

[Tortious]

Not always easy to do by serial number. If it's a black label and starts with 1, probably an 81. Beyond that, it gets dicey and you usually have to open them. https://www.analogman.com/tshist.htm

Probably want to open them anyway and confirm (or not) the JRC4558D op amp chip.

[Dave Scepter]

2 hours ago, RobB said:

Found a coupla very early 80s Tubescreamers in the estate sale pile. 

Cha-ching!!

[tommy p]

Just be yourself, be polite and sincere and maybe try something a little witty when you ask.  Suggest something casual like coffee at first.  If they still don't want to date you accept it and move on.  😂

[HamerCustomEr]

14 hours ago, tommy p said:

Just be yourself, be polite and sincere and maybe try something a little witty when you ask.  Suggest something casual like coffee at first.  If they still don't want to date you accept it and move on.  😂

I was thinking the same thing!  If they are MIJ, it might be helpful to learn a few simple phrases, too, like " こんにちは" (Hello),

or "私はあなたを愛しているのだと思う" (I think that I love you).

[RobB]

OK, smartasses. It's an '84. Thanks for the help.