> One of my fellow vintage radio club members "saved" a De Forest
> Oscillion XMTR from being junked. It's in fairly good shape but does
> have a few "vacant" spots on the chassis. Our hope is to restore it
> back to it's "original glory" but the only photos we can find are of
> fairly poor quality and we've drawn a total zero on a schematic. Any
> information would be GREATLY appreciated! The tag on the front panel
> reads: De Forest Radio Phone series No. 117
> Visit the AWA web page at: http://www.antiquewireless.org
> Post message: email@example.com
> Subscribe: firstname.lastname@example.org
> Unsubscribe: email@example.com
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Let's see if we can figure out which model this one is. The
known Oscillion xmtrs are:
In 1921 catalog:
O - has a row of four "5-watter" tubes horizontally out
the front panel, plus two rectifier tubes on right-angle
sockets at the bottom of the panel, plus two meters, plus
mike attached to top of panel.
OT-5 - has three "5-watter" tubes horizontally out the
front panel, one meter, mike attached to panel.
OT-10 - similar; has a row of four "five-watters."
OT-20 - has *two rows* of four "five-watters" each out
the front panel, two meters, mike.
OJ - one small vertical tube on the front panel, mike, no
OB1 - one large Oscillion behind panel, two meters, no mike.
OB2 - two large Oscillions benind panel, two meters, no
mike, cooling fan for tubes.
OT-3 - three "five-watters" on chassis, one meter, no mike.
I can furnish catalog extracts on these (xerocopies of
xerocopies except for the 1921 line) and the operating
instructions for the OT-3 . . . no schematics though, sigh.