On Jun 3, 2025, at 2:03 PM, Frank Smith via cctalk <cctalk(a)classiccmp.org> wrote: You might want to try asking on the greenkeys mailing list on qth.net that specializes in old teleprinter gear. I know a few years ago someone there made a mold and reproduced the rubber print hammers for the 33, and there were also many other collectors and former Teletype service engineers on the list that would help with troubleshooting and providing pointers to parts sources. Good luck, Frank > On Jun 3, 2025, at 1:33 PM, Mike Katz via cctalk <cctalk(a)classiccmp.org> wrote: > > The reader issue is that the reader power pack board is missing. > > Do any of you have a spare power pack board (183087) . > > If I can figure out the voltages I may try to reproduce it. > > I don't know if the reader power pack board for automatic reader operation (183079) will work or not. > > I'm still looking for the following items for the ASR-33 > > rubber hammer (180502) > paper spindle (181043) > paper tape spindle (183918) > paper tape ends (182935) > chad box (182924 or 182965) > > Thank you, > > Mike > > >>> On 6/2/2025 11:29 PM, Mike Katz via cctalk wrote: >> I was given an ASR-33 complete with stand, read & punch. >> >> This ASR-33 has been modified for RS-232 though a blue perfboard mounted in the connection enclosure (under the cover place where the dialer would be. >> >> Is has a DB25 ribbon cable coming off of this board. The perfboard does not have a label on it that I can find. >> >> The ASR-33 also has a 3 x 5 conductor rectangular connector coming out of the read of the unit with 6 female contacts installed. >> >> I was able to connect the ARS-33 to a VT-330+ at 110B 8-N-2 and send and receive on the teletype. >> >> The punch seems to work as well. >> >> The reader will "chatter" then the reader is put in the stop position and the tape out sensor is pressed but the sprocket does not advance and the reader pins to not move. >> >> Questions: >> >> 1. Why the reader is not advancing and the pins are not activating? >> Could this be a read enable contact not being in the active position? >> 2. What are the outs of the RS-232 DB-25. Other than TX, RX and GND >> 3. What are the pin outs of the 3 x 5 rectangular connector. I think >> this is the current loop and other control signals. >> >> Does any any of the items below for sale or have a 3D model I can print: >> >> 1. Roll Paper spindle (the spindle that the roll paper spins on) >> 2. Paper Tape Punch Spindle (the spindle that the paper tape spins on) >> 3. Paper Tape Chad feed tube >> 4. Paper Tape Chad Box >> >> I will be connecting this to either a PiDP-8/I or a PDP-8/E for now and eventually a PDP-8/L >> >> Thank you, >> >> Mike >> >> >> >> >

The people on the Greenkeys forum <https://mailman.qth.net/mailman/listinfo/greenkeys> have remade the TTY hammers.

Most hammers are mush and need to be replaced. If you have an original hammer you risk damaging the print cylinder

Tony Duell wrote: Alternatively, I once got a KSR 33. It was guaranteed to be in perfect condition. It certainly looked it. Before powering it up, I even stuck my thumbnail into the cap to check if it was ok. It _seemed_ to be. I attached it to a modern computer with a current loop/232 converter and sent it some text. The cap immediately exploded into bits. Grains of sand size. I yanked the power cord on the TTY and avoided any real damage to the type cylinder but I will never trust an old cap again. I use plumbing faucet washers, held in place with shrink tube. Bill S.

Tony, Rubber has a tendency to do that.

Do you still have the other parts?

Also, don’t try to print without the rubber print hammer, the typeface metal is softer than the metal of the print hammer, and without the rubber hammer in place you will quickly flatten out the letters. A small piece of vinyl tubing can work as a temporary substitute. Frank cctalk(a)classiccmp.org&gt; wrote: that specializes in old teleprinter gear. I know a few years ago someone there made a mold and reproduced the rubber print hammers for the 33, and there were also many other collectors and former Teletype service engineers on the list that would help with troubleshooting and providing pointers to parts sources. wrote: operation (183079) will work or not. mounted in the connection enclosure (under the cover place where the dialer would be. does not have a label on it that I can find. of the read of the unit with 6 female contacts installed. and receive on the teletype. and the tape out sensor is pressed but the sprocket does not advance and the reader pins to not move. print: and eventually a PDP-8/L