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-   -   Magnavox 78 rpm record player & Motorola wireless record player (http://www.videokarma.org/showthread.php?t=262417)

radiotvnut 08-19-2014 03:59 PM

Magnavox 78 rpm record player & Motorola wireless record player
 
Here's a late '30's-early '40's Magnavox "playfellow" 78 rpm record player that I just picked up. Looking at the schematic, this is the first one that I've ever seen where a high output crystal cartridge is driving a PP audio stage directly. I'm sure the cartridge is dead and reading the recent posting about WTS does not make me very anxious to send it in for a rebuild. So, I'll likely rig a counterbalance spring to the tonearm, install a modern ceramic 78 rpm cartridge (probably a P51-3), and I might have to add a preamp stage to the existing amp. It's been my experience that these older 78 rpm electric record players are much harder to find than the later multi-speed models, probably because they were all tossed during the '50's when LP's and 45's took over.

http://i538.photobucket.com/albums/f...ps76ee170e.jpg

http://i538.photobucket.com/albums/f...psc3855f5f.jpg

http://i538.photobucket.com/albums/f...psaa7dde71.jpg

http://i538.photobucket.com/albums/f...ps9a27abdc.jpg

Next, I picked up this Motorola model 21A wireless record player from the late '30's. This is about the ugliest record player that I've ever seen; but, I didn't have any wireless record players and it was cheap. As many of you know, these contained a small transmitter that would broadcast the content of the record to a nearby AM radio. This is a two-tube model, with one active tube and the other one is a triode wired as a diode and used for the rectifier. My biggest concern is the cartridge and due to the way it mounts, along with the overall design of the record player, I may be forced into a cartridge rebuild.

http://i538.photobucket.com/albums/f...psae0cff70.jpg

http://i538.photobucket.com/albums/f...ps70248f72.jpg

http://i538.photobucket.com/albums/f...pscd18edcf.jpg

http://i538.photobucket.com/albums/f...ps2233507b.jpg

KentTeffeteller 08-25-2014 09:36 PM

Nice, radiotvnut. Many of the early models were converted to 3 speed phonos or scrapped. A nice find. Worth adding a gain stage to use a modern cartridge, I think on both.


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