Over the years the control boxes at the tower changed somewhat; some
versions may not match the current schematic on BAMA.
There is nothing in the motor housing...the motor just wants to see AC
power, and the direction it turns is based on which windings are selected by
the toggle switch in the control box.
In mine, there are no internal relays and there is no S3/S4 (they are used
to define presence of the limit switches), rather 3PDT toggle switch is what
activates the motor (CW or CCW).
I'll bet you have an older LM470 ("D" or earlier) which precedes the manual
on BAMA. I can send you some photos if you wish. Advise!
GL es 73
Dan
K0DAN
-----Original Message-----
From: K8RI
Sent: August 02, 2013 10:07
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Control circuit for LM470 NEVER MIND, I FOUND ONE
On 8/1/2013 8:52 PM, K8RI wrote:
On 8/1/2013 8:50 PM, K8RI wrote:
Thanks for the replies, but I did find one. Section 2, page 22
Now the question: What are the "internal relays"? Looks like they are
labeled $3 and $4 rather than S3 and S4.
Are they in the motor housing?r
The manual is about as clear as the photo copy. Thanks EZ Rino.
It looks like their printer was a bit generous with the ink<:-))
73 es Thanks all,
Roger (K8RI)
I recently purchased an LM470 from an estate sale without the controls.
It has the limit switches and winch. I think he had removed them for
work, improvements, or who knows what. He was quite a tinkerer, but
unfortunately the original was no where to be found. I'm going to build
a new control circuit, placed inside a NEMA 4 enclosure.
The circuit for a motor and limit switches is pretty straight forward,
but I'd like to keep it close to oeiginal. I can build the whole thing
for jess than a hundred, or about $400 using industrial switches and
lights.
Any one have a copy of the schematic? I didn't find one in the manual,
but could have missed it *(IF)* it is there,
73
Roger (K8RI)
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