Take a
look at my
CORROSION TOPICS page. Lots
of
unfortunate mistakes and cures. Complete with closeups!!!
I haveall
Heath
GDOs
including:
the Models GD-1,
GD-1A,
and
the
GD-1B.
Deserving special mention is the
Heath GD1-B (1955) Special LF Version
GDO,
his very rare
GDO
is in absolutely MINT
condition; with:
original shipping box, instruction
sheet, conversion scale, and Auxiliary Coil
Set 341-A for ranges:
300kc-700kc and
700kc-1.9Mc (it'd be a shame to use
Hertz
here, wouldn't it!); The optional
LF coils and chart cost $3.00
in 1954!!. The associated
GD-1B was
$19.50. I also have the
HM-10A Tunnel Dipper:
one of the few (if not the
only)
commercial Amateur Radio applications of the
tunnel diode.
Also included in my collection
is an assembled (by me)
HD-1250
MOSFET GDO; and an
unopened, still-sealed-in-the-box
HD-1250
kit as well as a complete
& unbuilt
GD1-B (tube-type) GDO kit.
I also have two models of
the European version of the Heath
GD-1, the
GD-1U's.
One-as seen at left-that is a medium grey, with white letters. The other
is a lighter grey, with dark letters. I believe this is the older unit.
These are 220V European-only models I got from England. Very similar to
the U.S. GD-Series, but a nicer design. Notice the EURO 220 VAC plug.
ABOUT THE
Heathkit GD-1 Series GDOs
The
Heathkit GD1-series
of
GDOs are AC line powered instruments with a range of 2 to 30 MHz using
five coils; and having an available auxiliary 2-coil set extending the
unit down to 350 kHz. The American series uses a single
6AF4A vacuum tube.
The
European version, the
GD-1U, uses an
EC-92 / 6AB4. There are two
color schemes associated with the latter unit, and I have both. The
meter movement is 500 uA movement. The net weight of a GD-1B is 2 lbs or
0.9 kg.
This website is
always
under construction...
