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[TowerTalk] US Tower: RMC -1000 Fuse Blowing

Subject: [TowerTalk] US Tower: RMC -1000 Fuse Blowing
From: "Richard Diddams" <>
Date: Fri, 5 Aug 2005 18:28:10 -0700
List-post: <>
Purchased a TX-472MDP, which included the MDP-750, an RMC-1000 Remote Control, 
a MCL-100 Limit Switch Control in September 1998.  Up until the last few days, 
the US Towers equipment has operated flawlessly.  
Prior to a monsoon hitting the area (Chino Valley, AZ), used the RMC-1000 to 
lower the tower, and the fuse blew in the Remote Control box.  Discovered a 
couple of problems, 1) the DOWN relay (Omron G7J-4A-B) is defective and am 
waiting for replacement and 2) ground wire between the Relay box on the tower 
and the RMC-1000 is disconnected, the fuse stops blowing.
Disconnecting ground in the RMC-1000 and leaving ground wire attached in Relay 
Box, fuses continues to blow.   Disconnected the cable between RMC-1000 and 
Relay Box and attached the RMC-1000 to Relay Box at the tower.  Fuse still 
blows when ground wire is connected.
The Relay Box mounted on the tower and the RMC-1000 Remote Control boxes are 
very simple, however, US Towers does not have schematics.  
1st.  Any one have schematic I can have (purchase).  
2nd.  Has anyone have experienced the blowing of the RMC-1000 fuse and when 
disconnecting the wire in the Relay Box (only) the fuse does not blow.  Cable, 
between Relay Box and RMC-1000 checks out A-OK - - - no short or high 
resistance short between any of the wires
Dick Diddams W7QHE

See:  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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