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Post by pamcopete on Dec 13, 2010 9:43:50 GMT -5
dogbunny,
Well, three phase rectifiers have always been available, but they used to be very expensive because most three phase circuits are very high amp or high voltage. This one is good for 25 Amps at 600 PIV, so it is a good choice for our application. Heat sinking is still very important, however.
The Radio Shack rectifiers still have the advantage of being locally available with a spare set of diodes.
I just like the idea of being able to go to your local Radio Shack and coming out with a rectifier that is better than the original for less than $10 and then going across the street to your local NAPA store and coming out with a regulator for your 30 year old bike for less than $15.
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Post by madmax on Oct 18, 2011 11:44:27 GMT -5
Can someone with better knowledge of electrickery confirm if these uk.rs-online.com/web/p/bridge-rectifier/6290041/ will do the same job as the Radio Shack ones specified by Pete? Maybe just a difference in technical terminology between the US & UK, is Peak Inverse Voltage the same as Peak Reverse Repetitive Voltage? Thanks Max |
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Post by speez on Oct 19, 2011 7:31:47 GMT -5
yes you can use that rect. if you want a cleaner look and easy hook up you can use 1 of these, uk.rs-online.com/web/p/bridge-rectifier/0462067/ its a 3 pH's. so only 1 is needed, it would need kind of some heat sink to dissipate the heat just like the sinlgle pH |
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Post by madmax on Oct 20, 2011 13:16:24 GMT -5
Thanks Speez, that's what I needed to know, I've found a job-lot of the 25A ones on ebay, a tenner for 24 of them so I've enough spares for the next lifetime, anyone in the UK need some and I'll send a couple for postage, just PM me.
Max
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Post by madmax on Oct 30, 2011 11:10:21 GMT -5
So I made up the rectifier as per Pete's instructions and fitted today, the bike feels smoother somehow, is there any technical reason for this or is it just wishful thinking on my part?
Still getting barely 12V at tickover, the new solid state regulator should be here any day now, roll-on.
Max
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Post by xsleo on Nov 2, 2011 16:33:19 GMT -5
The tickover voltage of 12 volts is ok if the lights are on. What is the voltage at 2000+ rpms?Should read 14.5 volts at that rpm, and never go higher than that.
If you are still running the stock mechanical regulator it might run too high. They were not the best when new, 30 + years didn't help any. The solid state regulator will do a much better job.
Your old rectifier wasn't as efficient as the new rectifier, so more of the alternator output is used to run the bike. This better voltage increases the spark strength, Better spark= better running.
Leo
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Post by xsleo on Feb 29, 2012 12:52:47 GMT -5
On 3 phase rectifiers I was just on ebay and plugged in 3 phase bridge rectifiers and found them starting at $4.25 shipped.
Leo
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srust58
Junior Member
79 XS650 Special 76 HondaCB750F Super Sport
Posts: 67
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Post by srust58 on Mar 8, 2013 2:11:26 GMT -5
Three phase rectifier $14 (50 amp 100 volt) and heat sink $1.20 from Digi-Key. The cheaper rectifiers I found all shipped from China with a time of 3 weeks. Digi-Key is a local company for me. This one mounts in the same place as the original. I had to cut the middle out of the inside fin on the left to fit the rectifier. Easy with a little battery power dremel. Rectifier 36MT10-ND (28mm square) heat sink V7466Y (50mm long) or shorter version V7466X (38mm) Alternate heat Sink 642-45AB (35mm square with straight fins)   |
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Post by eriktassmer on Feb 24, 2014 22:53:56 GMT -5
So would this work on a 76 xs400?
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Post by ignitionsystem on Feb 27, 2014 18:20:56 GMT -5
So would this work on a 76 xs400? It should. |
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