[Jukebox-list] AMI carriage junction box revisited

[John Robertson]

At 8:29 PM -0700 3/27/07, Jay Hennigan wrote:
>Joey McDonald wrote:
>>Hey all,
>>
>>I have been working out some selection problems with my AMI F120 
>>over the past 2 weeks.
>>I included some past posts here as a reminder of the topic.
>>I am still tring to resolve this issue with the contacts arcing. I 
>>have installed 2 1amp mdl fuses in the
>>8/10 fuse holders of the power supply. The fuses do not blow.
>>This power supply has a new rectifier in it as Aaron stated.
>
>FYI, I reverse-engineered the junction box for the Continental, it 
>should be similar to yours.   Here is a link to the info including 
>some safety mods and modern replacement parts/substitutes.
>
>http://www.west.net/~jay/jukebox/amijunction.html
>
>--
>Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
>Impulse Internet Service  -  http://www.impulse.net/
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Hi Jay,

Your page on updates for the junction box is good, but you should 
also mention to folks that if they replace the selenium rectifier 
with a silicon version that they need to add two more fuses - one on 
each AC input to the bridge. Otherwise if the bridge rectifier ever 
shorts out a diode that will probably destroy the transformer before 
the 2.5A fuse will blow. Could be a fire hazard as a result - so we 
always add a pair of diodes when converting to silicon.

Your ground information is good and yet often overlooked by folks 
doing their (or other folks) machines - its what we've been doing 
since the 80s on any restoration job.

John :-#)#
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