Dave
Thanks for the history. The turret looks very much like a bigger copy
of the TV tuner turrets from the late 40s and early 50s. It's a good
idea but too expensive. I guess the emblem was glued with some pretty
sorry adhesive as I can't see any residue from where it should have
been. If it was poor adhesive and they were falling off there should
be a spare or two around. Wish I could find one.


--

73
Hank WD5JFR
"David Thompson" wrote in message
nk.net...
I have an interview on tape with Frank Lester W4AMJ (then W2AMJ) who
was Mr.
Hammarlund from 1955 to 1970. When he was hired by Lloyd Hammarlund
(son
of the founder) he found the Pro-310 did not come close to specs. He
and
the Engineers spend quite a bit on bring it "close" to apecs.

The reason you don't see many is that the turret costs $85 per unit.
That
is what there is the box within a box. Hopefully the band switch
cable has
only fallen off. Otherwise its a nice box outside and a real dud
inside.
Lloyd put a stop to production after only a few hundred units!

Frank found that none of the Engineers were hams. Since Lloyd cut off
the
funds Frank went to work to get some of the Engineers to be hams. He
went
to work on what saved Hammarlund (outside of several commercial
ventures)
and that was the HC-10/SPC-10 SSB/CW converter. Frank wanted to use
crystal
or mechanical filters but Lloyd asked for alternatives (they were
cheap)which is the principle reason for the 60 kcs IF's found in the
HQ-170,
HQ-180, and the HC-10. Lloyd kept the old SP-600 series alive by
selling
the SPC-10 at several times the HC-10 price to the thousands of users.

But never fear, the idea behind the Pro-310 stayed alive in the guise
of the
HQ-215.

Hope the Pro-310 turns out to be a great piece of History. Frank
could
never say why the H emblem was missing from most of the units.

73 Dave K4JRB