Uploaded June 2026 | Updated September 2026, 3 weeks ago
In this video I restore and demo a Teleram 4000 / T-4000 vintage computer. What makes this computer unique is that it is a full fledged CP/M system with magnetic bubble memory standard. That provides 128 KB of nonvolatile storage, something that was pretty uncommon back in 1983. The closes parallel would be something like the Radio Shack / Tandy Model 100, which did not have built in persistent storage -- if the battery went dead, it took the contents of memory with it. The Teleram was built like a tank, not only heavy duty construction, but heavy from a weight perspective as well. Getting the computer up and running was not too difficult. I had to ditch the 6 throughly dead vintage lead acid batteries and substitute my own power supply. Also, true to form, I demo speech synthesis on this using a Votrax PSS Speech Synthesizer (which I also repair in the video). For more vintage computer projects, see smbaker.com
In this video I restore and demo a Teleram 4000 / T-4000 vintage computer. What makes this computer unique is that it is a full fledged CP/M system with magnetic bubble memory standard. That provides 128 KB of nonvolatile storage, something that was pretty uncommon back in 1983. The closes parallel would be something like the Radio Shack / Tandy Model 100, which did not have built in persistent storage -- if the battery went dead, it took the contents of memory with it. The Teleram was built like a tank, not only heavy duty construction, but heavy from a weight perspective as well. Getting the computer up and running was not too difficult. I had to ditch the 6 throughly dead vintage lead acid batteries and substitute my own power supply. Also, true to form, I demo speech synthesis on this using a Votrax PSS Speech Synthesizer (which I also repair in the video). For more vintage computer projects, see smbaker.com
