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6 volt or 12 volt voltage regulator
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roadkingdoc
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PostPosted: Wed Jul 28, 2021 4:31 am    Post subject: 6 volt or 12 volt voltage regulator Reply with quote

I found a voltage regulator in my parts the other day. how do I tell if it is 12 volt or 6 volt. no marking on it. thanks
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mukluk
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PostPosted: Wed Jul 28, 2021 7:23 am    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

Voltage regulators typically have markings stamped into the metal legs used to bolt them in place. If none are there then it's likely an aftermarket piece and you'll need to look over the whole thing for any kind of identifying marks, part numbers etc, in order to figure out what it is. Posting up several clear pictures from different angles may help.
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PostPosted: Wed Jul 28, 2021 7:36 am    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

Some aftermarket just had a sticker.
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PostPosted: Wed Jul 28, 2021 9:37 pm    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

A rough guide for VW regulators is that the six volt regulators have curved mounting legs and 12 volt do not since they are mounted in places other than the generator housing.The one above is a 12v. The one below is a 6v.

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roadkingdoc
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PostPosted: Thu Jul 29, 2021 5:34 pm    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

well I think I have a 12 volt 38 amp Bosch regulator. can it be used on a beetle or bus? thanks
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mukluk
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PostPosted: Thu Jul 29, 2021 8:38 pm    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

roadkingdoc wrote:
well I think I have a 12 volt 38 amp Bosch regulator. can it be used on a beetle or bus? thanks

Only if it's paired with a GR-17 38 amp generator as used on some '68-'71 Type 2s. I wouldn't use it with your typical Type 1 GR-15 rated at 30 amps as it won't have the correct overcurrent protection.
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roadkingdoc
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PostPosted: Fri Jul 30, 2021 2:04 am    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

thanks so much for the help!
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Eric&Barb
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PostPosted: Fri Jul 30, 2021 6:22 pm    Post subject: Re: 6 volt or 12 volt voltage regulator Reply with quote

tasb wrote:
The one below is a 6v.

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As almost always there are exceptions....
Back in the late 1980s there were 6 volt sized generators with regulators on top (like the above image), that were a 12 volt unit. Think they were manufactured out of Nippon. Bought two of those gen/reg kits and ran them till the regulators needed to be adjusted. Still have them somewhere here...
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