by Radiotvnut »
Mon Feb 07, 2011 6:30 am
I think Aduiotronics was based out of North Hollywood, CA and came on the scene in the late '50's with the earliest version of their model 300 classroom record player. They made many versions of the model 300, beginning in the late '50's up until around '80. There were both tube and solid state versions. Some came in a beige case and the later ones came in a green case with a wider, more modern looking tonearm. The earlier tube models used 3 tubes. The later tube models had a solid state rectifier and a single 6T9 compactron that contained the driver and output tube in a single envelope. I think the tube type models were discontinued in the very early '70's. Your unit looks to be from the mid-to-late '60's. If you look on the motor label, there will probably be a date code. In the early '80's, the 304 series replaced the old 300 series. These 304's were cheaper made and used a cheap plastic tonearm. Sometime in the '80's, Audiotronics was bought by Telex and the brand name was changed to Telex. Audiotronics also made reel-to-reel tape recorders, cassette recorders, and other equipment for classroom use.
Newcomb was another big player in the classroom record player market; and, these models seemed to be the best built. I think they went belly up sometime during the early '80's.
I suspect the VM models with the record changer were meant for home use. Some of those VM portables were quite nice and sounded very good. VM also made single play classroom models up until the mid '70's.