[GreenKeys] Model 15 Associated Press with Model 19 keyboard...can it work?

[E.]

The first question is if the Model 15 is a RO (Read Only, which it sounds like it may be) or a KSR (Keyboard-Send-Receive).  While I have not seen a mailbox 15 (RO) in person — and someone can correct me on this if I'm wrong, I think the RO lacks the inner-contacts for the keyboard.  If it’s a KSR, I think it might work?  The first thing you might want to do is to trace down the wiring with your 15 and compare it to the 15/19 wiring diagrams.  I know this is not a great thing to hear when you’re excited to turn it on and make it work (been there before hahah), but it’s 100% worth it by not putting something where it shouldn't be, burning something out and having very little spare parts to repair it with.

Good luck!


> On Feb 23, 2026, at 8:08 PM, Johannes Eggers <johannes.eggers at gmail.com> wrote:
> 
> I have an Associated Press teletype which I believe is a Model 15, and a Model 19 keyboard (bought separately).  I'm brand new to this stuff.  My first question is:  Assuming these 2 are working, can I just plug the keyboard into the main unit and it should work? Related to this: Where the Associated Press units a "cutdown" version with certain things missing because they weren't strictly needed for a receive-only setup?