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Plane Bart
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Joined: 20 May 2010
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Location: Stafford VA
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 Posted: Sun Sep 16, 2012 12:53 pm Post subject: Full Wave Bridge rectifier conversion pictures |
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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.
[/img]
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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Location: Stafford VA
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| Posted: Sun Sep 16, 2012 1:10 pm Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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
Tractor Guru
Joined: 12 Mar 2010
Posts: 6861
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| Posted: Sun Sep 16, 2012 5:04 pm Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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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Joined: 20 Aug 2002
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| Posted: Mon Sep 17, 2012 4:21 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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
Tractor Expert
Joined: 29 Sep 2011
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| Posted: Mon Sep 17, 2012 4:26 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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For the uninitiated, non-electrical among us, what's the purpose of this?
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gatchelguy
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Joined: 16 Apr 2011
Posts: 163
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| Posted: Mon Sep 17, 2012 6:54 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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
Tractor Guru
Joined: 13 Aug 2007
Posts: 24532
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| Posted: Mon Sep 17, 2012 7:08 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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| 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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Joined: 27 Jul 2011
Posts: 28
Location: Little Meadows, Penna
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| Posted: Mon Sep 17, 2012 7:29 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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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Joined: 20 Aug 2002
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| Posted: Mon Sep 17, 2012 7:47 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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solid state cut out.. it's a 1 way electron valve.. 
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Mr. T. Minnesota
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Joined: 17 Jan 2012
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| Posted: Mon Sep 17, 2012 11:11 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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
Tractor Guru
Joined: 13 Aug 2007
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| Posted: Mon Sep 17, 2012 1:29 pm Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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| 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
Long Time User
Joined: 20 May 2010
Posts: 678
Location: Stafford VA
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| Posted: Mon Sep 17, 2012 1:32 pm Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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Full wave bridge rectifier was $5.00 bucks
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Hobo,NC
Tractor Guru
Joined: 14 Jun 2007
Posts: 18896
Location: Sanford,NC
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| Posted: Mon Sep 17, 2012 4:23 pm Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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Nice post I have never been their it clears it up...
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JMOR
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36 Coupe
Tractor Guru
Joined: 12 Mar 2010
Posts: 6861
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| Posted: Tue Sep 18, 2012 2:40 am Post subject: Re: Full Wave Bridge rectifier conversion pictures |
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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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