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Full Wave Bridge rectifier conversion pictures

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Plane Bart
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PostPosted: Sun Sep 16, 2012 12:53 pm    Post subject: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

I got side tracked with an air compressor but did install the
Radio Shack Full wave bridge rectifier part#275-1185 25 amp, 50 volts
a

Drill out the 2 wire cut out relay remove guts, file off the small knub on plate.



Installed heat shrink and spade terminals.


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Last edited by Plane Bart on Sun Sep 16, 2012 1:06 pm; edited 1 time in total
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Plane Bart
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PostPosted: Sun Sep 16, 2012 1:10 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Generator wire gos to the positive terminal AKA the one opposite of the other three, used a volt meter to determine which terminal to put the battery on chose the one with 6.5 volts DC
 
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36 Coupe
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PostPosted: Sun Sep 16, 2012 5:04 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Cable ends look awful close on the starter switch.Dont forget the diode has a.7 volt drop that produces heat.
 
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souNdguy
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PostPosted: Mon Sep 17, 2012 4:21 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

you have really got to stop loosing sleep about that pitifull forward voltage drop.

you do realize you are sweating about less than 8w on a case that is designed to dissipate many times that???
 
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W_B
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PostPosted: Mon Sep 17, 2012 4:26 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote


For the uninitiated, non-electrical among us, what's the purpose of this?
 
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gatchelguy
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PostPosted: Mon Sep 17, 2012 6:54 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

What is a full wave bridge rectifier and what does it do and why is it needed on a 2/9N???
 
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JMOR
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PostPosted: Mon Sep 17, 2012 7:08 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

gatchelguy wrote:
(quoted from post at 10:54:39 09/17/12) What is a full wave bridge rectifier and what does it do and why is it needed on a 2/9N???
It is just 4 diodes in a common package, wired to provide rectification of 2 wire AC input & yield 2 wire DC output, which has nothing to do with the application in the tractor. People use it to replace the electromechanical cut out on 9N/2N tractors. It is just a readily available diode from the omni-present Radio Shack Stores. They don't sell a single high current diode, but do sell the 4 diode bridge package for high current, so people buy it, connect one of the 4 diodes & let the other 3 sit idle. The 1 connected diode acts like a check valve in that it lets current flow from generator into battery, but prevents the reverse, i.e., prevents the battery from discharging into the generator.
 


Last edited by JMOR on Mon Sep 17, 2012 7:10 am; edited 1 time in total
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Wings
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PostPosted: Mon Sep 17, 2012 7:29 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Are you not aware that only 1 of the 4 diodes in a bridge rectifier package is being used?

A single diode is all you need to prevent the battery from discharging back through the generator due to a bad cut out relay.
 
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souNdguy
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PostPosted: Mon Sep 17, 2012 7:47 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

solid state cut out.. it's a 1 way electron valve.. Smile
 
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Mr. T. Minnesota
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PostPosted: Mon Sep 17, 2012 11:11 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

JMOR,
What is the total cost of the bridge rectifier? I have a complete single diode unit on two 6 volt systems at the cost of about $30.00 each. There is no fabrication involved. Just curious!!
Mr. T. Minnesota
 
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JMOR
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PostPosted: Mon Sep 17, 2012 1:29 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Mr. T. Minnesota wrote:
(quoted from post at 15:11:05 09/17/12) JMOR,
What is the total cost of the bridge rectifier? I have a complete single diode unit on two 6 volt systems at the cost of about $30.00 each. There is no fabrication involved. Just curious!!
Mr. T. Minnesota
Her is 50A for about $5. Many on their site.
http://www.radioshack.com/product/index.jsp?productId=12678415
 
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Plane Bart
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PostPosted: Mon Sep 17, 2012 1:32 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Full wave bridge rectifier was $5.00 bucks
 
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Hobo,NC
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PostPosted: Mon Sep 17, 2012 4:23 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Nice post I have never been their it clears it up...
 
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JMOR
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PostPosted: Mon Sep 17, 2012 4:34 pm    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

Hobo,NC wrote:
(quoted from post at 20:23:27 09/17/12) Nice post I have never been their it clears it up...
If you leave a bit more of the original cut out base, then it will look virtually stock, like this:
http://www.tractorshed.com/cgi-bin/gallery/gallery_pic.cgi?pic=http;//www.tractorshed.com/gallery/pieces/v762.jpg&firstrec=5&Parameter=cutout&w=pieces&cc=0
http://www.tractorshed.com/cgi-bin/gallery/gallery_pic.cgi?pic=http;//www.tractorshed.com/gallery/pieces/v764.jpg&firstrec=5&Parameter=cutout&w=pieces&cc=1
 
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36 Coupe
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PostPosted: Tue Sep 18, 2012 2:40 am    Post subject: Re: Full Wave Bridge rectifier conversion pictures Reply to specific post Reply with quote

You dont know much about old Ford generators.They were rated at 70 watts and wound with a #17 wire in the armature.They tended to burn running at 8 volts.Loose connections in the charging circuit let the voltage climb.Do you know that turning on the head lights too soon after starting the engine would burn out the bulbs on a Ford car with a 3 brush generator in cold weather.
 
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