[BC] RCA phono plugs - How far back?

[ChuxGarage at aol.com]

In a message dated 9/3/2008 5:16:09 PM Central Daylight Time, 
broadcast-request at radiolists.net writes:

> One Internet source indicated early 40s as the origin, 
> another source indicated maybe in the 30s but neither source offered 
> any specifics or back up.

My Grandmother had a pre WWII Brunswick radio that also contained a 78 RPM 
phonograph.  In the early 1960's I replaced the changer mechanism with a three 
speed automatic from Collaro.  Hot stuff in it's day.  The connection was via a 
single RCA Jack.  I don't know what year the Brunswick was made, but if 
family folklore is correct, my grandparents got it about 1939 or 1940. 

Chuck Conrad
KZQX Radio
www.kzqx.com