Power for my Vic 1 and PRC-10

Steel Soldiers is supported by:

jeffhuey1n

Active member
Steel Soldiers Supporter
1,269
22
38
Location
Laramie County, Wyoming
I may be trotting on old ground here but... I have a Vic-1 system. To power it, I want the current to go through a MX-7778/GRC electrical suppressor. If possible, I want the current also go to my PRC-10 radio. The problem, as many already know, it the cable that goes from the battery to the suppressor. That’s supposed to be cable number CX-10071/U, which is incredibly difficult to find. Time for plan B. I’ve got a damaged AM-1780/GRC. It has a 4 point plug that is the same as many other electrical parts. I also have several cables that will work. Step one was to tear down the 1780. Pretty easy. I definitely need to get a better soldering iron. Anyway, the plug was easy to get to and easy to remove, once the soldered connections were disconnected. Moving over to the MX-7778/GRC went okay except for one problem. The two wires that connect the power plug have about a metric ton of solder. I held a soldering iron against it for a solid hour, nothing happened. I’ll figure out a solution for the two wires...
Anyway, both boxes are opened up and once I have two wires, I’ll put it back together and test it. Pics below:
 

Attachments

jeffhuey1n

Active member
Steel Soldiers Supporter
1,269
22
38
Location
Laramie County, Wyoming
So, got the wires removed from the original plug. I used a propane torch to remove about a pound of old solder. Caution: molten solder is incredibly hot on bare skin! Got the replacement plug all cleaned up, which took about five minutes. Got my good soldering gun and soldered the wires to the replacement plug. Wasn’t easy but I think I got it done right. Started reassembling the 7778 and my back went by by, gone cause of cold weather. Oh well, I’ll try again tomorrow. For reference, I’ve included the original plug. Note the different center post. Here’s what the replacement plug looks with wires installed:
 

Attachments

Last edited:

jeffhuey1n

Active member
Steel Soldiers Supporter
1,269
22
38
Location
Laramie County, Wyoming
Bad news, my experiment failed. No damage was done to the 7778 overall but one of the pins in the replacement plug did get melted. So, next plan. Remove damaged part. Obtain a replacement, which I have several busted up electrical, radio type components. I’ll get the fitting (already to remove) swap out the plug, install new wiring (got a bunch in a teletype shelter) and figure out how to get power from the truck batteries through the 7778, safely. I’ve found some diagrams on components, still need to find the 7778 manual, if there is one.
Back to the drawing board as the used to say.
 
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website like our supporting vendors. Their ads help keep Steel Soldiers going. Please consider disabling your ad blockers for the site. Thanks!

I've Disabled AdBlock
No Thanks