[Hallicrafters] R-12 speaker

[Mike Everette]

I didn't mention the name for fear of being zapped by
you know who.  It shouldn't take a rocket scientist to
decipher the allusion.

> Was the RCA speaker you were referring to for the
> AR-77 as shown in this 
> photo?
> 
> http://members.ispwest.com/sheldon/ar77.jpg
> 

The listing for the RCA speaker I referred to did not
mention any associated receiver type.  I wish I'd
saved the picture.  The speaker -- if I remember right
-- had a round grille. There were a couple of vertical
ornamental trim bars, like the ones in the picture.  I
assume they were wood, mounted across the round
grille.

The studio speakers at the radio station where I
worked  dated from the late 30s, I assume, because
that is when the station first went on the air.  A lot
of their other stuff was at least that ancient.  The
speaker openings were round, with vertical trim bars;
but some of them had a rectangular "shelf" about 2 or
3 inches wide, however long the speaker opening was in
width, with rounded corners, at the top and bottom of
the opening, with fine screen mesh between these
"shelves" that made the unit look like it had a
protruding square grille.  I think these "shelves" and
screens had been added some time later.  Maybe it was
done to somehow protect the speaker.

I have no idea what the speaker impedances were but I
seem to recall that they used a 600-ohm line-to-voice
coil transformer.

73

Mike
WA4DLF

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