Roger:
The LM470 manual -DOES- have a schematic of the control box. At least I am
99+% sure it does. Like page 3-6. If not, I have one which I will scan &
send to you.
I don't think the control circuitry (mostly relays) has changed since my
1970'd LM470 "D" vintage. Also worthy is to look how the U/L limit switches
interface. Also, I kludged a homebrew "remote control box" which easily
kludges into the control box. I also added a microphone/preamp so in the
shack I can listen to the tower at such times as I remote control the
up/down.
GL es 73
Dan
K0DAN
-----Original Message-----
From: K8RI
Sent: August 01, 2013 19:50
To: towertalk@contesting.com
Subject: [TowerTalk] Control circuit for LM470
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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