Update on my 2800 and RT-21 'problem'. But first, what a great set of
replies I got on the reflector, and directly. This group continues to amaze
me with the generosity of help and abundant expertise. I intend to
contribute in areas of my expertise!
I also want to give a shout out to Jeff, at Green Heron. Jeff responded
quickly (on a weekend) to my initial emails with all the test data I took so
he could reply with possible problems. His response was detailed, thorough
and a direct reply to the details I sent him. I could not have asked for
better service. I hope to never need to ask for that kind of help again!
I mis-wired the cable to the controller. Stupid, yeah. Being a retired
engineer and thinking I am smart, I thought to make a XL spreadsheet of the
connections from the rotor connector thru a short cable to a connector, thru
a length of one type of old rotor cable to another type of cable to another
connector and to the pigtails to the controller. Showing the terminal
designations and all the wire colors in between. I also made some wires
parallel since I have extra wires. Once I made the cable to the
spreadsheet, I tested the heck out of it for continuity and shorts and
resistance of the wires. Perfect so what could go wrong. Well, if you
start with a transposition of numbers on the first column of the chart and
make and test to that mistake, things do not work. I had two of the
position feedback connections backward. Maybe I should go back to work and
keep the brain sharp!
I will mention that you need to carefully measure the motor winding in the
rotator due to series diodes. I got open circuit until I reversed the leads
and used the diode test feature (as Jeff reminded me!)
Again, my thanks to those that replied.
Again, great bunch of hams here.
73,
Al
N6TA
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of W3YY
Sent: Sunday, September 08, 2019 4:47 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Yaesu G-2800 problem with new unit
Al -
I have the same setup, G-2800DXA and RT-21D. The other suggestions offered
for solving your problem look good.
Here are some things you've probably done, but I'll ask anyway.
Have you confirmed that your brand new RT-21 has been internally configured
for use with the G-2800?
Did you initially go through the setup and calibration procedure for the
RT-21 with the G-2800?
Good luck. My G-2800 and RT-21D have been successfully turning my 2-el 40M
beam at 120ft for more than a decade. The GH controller and G-2800 are a
great combination and I hope you get it working.
73, Bob - W3YY
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
al.n6ta@gmail.com
Sent: Saturday, September 07, 2019 7:55 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Yaesu G-2800 problem with new unit
I hooked up my brand new RT-21 Green Heron controller to a brand new G-2800.
On the ground thru the final cable.
The rotor will not turn and the GH controller says Error No Motion. Lots of
checks and the motor winding is open, pins 4 and 5 on the rotor itself.
Upon initial test, I had no idea where the rotor was in its range. The
RT-21 said 263 when it was turned up while being connected to the rotor. I
used the point and shoot knob and set it to about 180 deg, the end of travel
limit, I believe. While watching the rotor from 20' away, I saw it move
momentarily. It has not moved since.
Looking at the documentation, I assume that the limit switches in the
rotator are open in some way that will not allow current to the motor. Or,
that there is an internal wire failure or the filter unit PCB in the rotor
has an open.
I note that the internal potentiometer is at end of range at 500 ohms as
measured from pins 1 to 2 and 1 to 3 of the rotor. Pins 2 to 3 is
essentially a short.
I believe the RT-21 is working fine and all the cable and connectors have
been checked till I am sick of testing!
I am hoping someone has some experience with this such that I can get it
going.
Al
N6TA
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