Can anyone comment on a comparison between these two rotors?
I'm looking to purchase one or the other, and need something to tip the
scales.

tnx,

--
Dave * N3WTK (DM04xf) * http://isi.mtwilson.edu

"David Snyder Hale" wrote in message
...
Can anyone comment on a comparison between these two rotors?
I'm looking to purchase one or the other, and need something to tip the
scales.

tnx,

--
Dave * N3WTK (DM04xf) * http://isi.mtwilson.edu

Did they start making the HD73 again? I thought they stopped that about 20
years ago. I still have one on my UHF antenna, bought the HD73 in 1979. My
main rotator is a Yaesu G1000. You get more for less with Yaesu. Really nice
control box.

Tam/WB2TT

I lke my Yaesu rotator but a lightning strike while still in warranty
nailed the control box and the US distributer offered no solution
other than buy a new rotator.

Fortunately, a homebrew control box is pretty simple.

On Fri, 16 Sep 2005 12:49:47 -0400, "Tam/WB2TT"
wrote:


"David Snyder Hale" wrote in message
...
Can anyone comment on a comparison between these two rotors?
I'm looking to purchase one or the other, and need something to tip the
scales.

tnx,

--
Dave * N3WTK (DM04xf) * http://isi.mtwilson.edu

Did they start making the HD73 again? I thought they stopped that about 20
years ago. I still have one on my UHF antenna, bought the HD73 in 1979. My
main rotator is a Yaesu G1000. You get more for less with Yaesu. Really nice
control box.

Tam/WB2TT

"David Snyder Hale" wrote in message
...
Can anyone comment on a comparison between these two rotors?
I'm looking to purchase one or the other, and need something to tip the
scales.
tnx,
--
Dave * N3WTK (DM04xf) * http://isi.mtwilson.edu

Dave -

This is a FAQ regarding rotators mfg. in USA.
The HD-73 was made by Alliance (Alliance, Ohio) and the Ham-M series by CDE.
http://www.rotorservice.com/index.htm
====
Alliance stopped production of their rotors in 1994.
Norm's Rotor Service (NRS) purchased their entire parts inventory for the
HD-73, U-100, and U-110 rotors and controls. NRS was recently purchased by a
group in Alabama.
====
The Cornell Dubilier Electronics company sold their rotor division to
Telex/Hy-Gain in 1981. Hy-Gain decided to support only the AR-22, AR-40,
CD45-II, Ham-4, and Tailtwister rotors. All rights to the other rotors were
assigned to Norm's Rotor Service.
Today NRS is the only facility with parts for these CDW or HyGain original
units (not in current production).
NRS has almost all of the parts for the AR-22, AR-33, AR-40, AR-50, BT-1,
TR-44, CD-44, Ham-M, Ham-2, and Ham-3 rotor models.
Telex/HyGain sold the HyGain line of rotors to MFJ in May of 1999 (NRS have
parts for these current US production rotors that Hy-Gain continues to
support.).
====
The Ham-M rotor was released in 1957, and there were 5 series with the last
rotor being produced in 1973. The Ham-M rotor would have the series number,
1 - 5, followed by 3 digits which indicated the week and year of
manufacture. For example, a rotor with the series number 5 322 would be a
Ham-M, series 5, manufactured in the twenty-second week (the '22' in '322')
of the year 1973 (the '3' in '322').
A Ham-M has a single-levered control box with a meter. In 1973 the mold for
making the Ham-M control unit shell was destroyed in a fire. So rather than
spend the money to replace the mold, the Ham-2 was born. The rotor was the
same as the Ham-M, but the control unit was replaced with a three-button
unit with a continuous meter reading.

In 1977 the Ham-3 rotor was released. The Ham-3 supported a new motor with
an internal brake, as well as a brass motor gear. The brake wedge was
redesigned, as was the brake housing, which gave the new unit a capacity for
more wind surface area. The control unit for the Ham-3 supported a new
PC-board-mounted meter.

In 1978 the Ham-4 or Ham-IV rotor was released. This rotor had a new steel
ring gear and a reinforced upper mast support. The only changes to the
control box were the addition of a new face plate, plastic top and bottom
covers, and a new meter with reversible meter scales. Also in 1978 the
Tailtwister rotor, commonly referred to as the "T2X," was introduced. The
T2X is a Ham-4 with an even heavier upper mast support, a heavier brake
wedge and brake housing, and 40 additional ball bearings. And the
Tailtwister control unit has three LED's that the Ham-4 doesn't have.

====

w9gb