[GreenKeys] ASR 33 - question about powering reader

[billdeg at aol.com]

 Hi
I have been able to get my PDP 11/05 to print "hello world" by entering a short program into the toggle switches.  I can simultaneously get the punch to print if I enable it.  


When I load and run the bootstrap loader the reader does not attempt to read a bootstrap tape either automatically or by pressing start.  I think that's because the reader is not getting power.

I have painstakingly traced the wires to get a good idea of the modifications made to the reader control. It appears that two of the wires coming from the reader are diverted to run through the 24V transformer (?) that is part of the reader control mod, and then exit the teletype.  On the other end the wires have round screw post connectors as if they could connect to a ground post or power supply.   Pics below. 

Any ideas where these would be plugged in given the photos below?  I don't think the two wires are supposed to be plugged into pins 4 and 6 of the mate-and-lock connector coming from the pdp 11.  I am pretty sure 4 and 6 are for a high-speed reader and have nothing to do with the TTY circuits.

http://vintagecomputer.net/teletype/asr33/PandB/with_PandB_JR-1000_pic2.jpg
http://vintagecomputer.net/teletype/asr33/PandB/PandB_JR-1000.jpg
http://vintagecomputer.net/teletype/asr33/PandB/with_PandB_JR-1000_red-black-leads.jpg
http://vintagecomputer.net/teletype/asr33/PandB/with_PandB_JR-1000_resistor_20mA.jpg

I am working to figure this out on my own, but I don't have much experience in this area!

http://vintagecomputer.net/teletype/asr33/PandB/PandB_terminalstrip4.jpg
FYI - The lines for the receive/send

I must be close.  I read that there was a power supply for the reader on some asr 33's, Do I need a 24V power source for the reader? 

Thanks in advance for any ideas/tips.

Bill