Dynamo Alternatives
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Dynamo Alternatives
I am in the UK and in need of a 6V dynamo for a 42 MB but they are proving hard to find (or eye-wateringly expensive)
Does anyone have experience with using any post-war Lucas dynamos? I don't mind adapting a bracket to make it fit.
Annoyingly, I bought what was claimed to be a refurbished dynamo for a WW2 Jeep a year or two ago and it does look almost the same except it has two holes on the top where the support arm fits. Anyway, it wasn't working so I gave it so an auto electrician who said it was fried! I'd shelled out a fair chunk of cash so I have started looking at other options. Function is more important than form although most of the candidates I have seen do look very similar
I'd be interested to hear if any of you have found a suitable alternative
Does anyone have experience with using any post-war Lucas dynamos? I don't mind adapting a bracket to make it fit.
Annoyingly, I bought what was claimed to be a refurbished dynamo for a WW2 Jeep a year or two ago and it does look almost the same except it has two holes on the top where the support arm fits. Anyway, it wasn't working so I gave it so an auto electrician who said it was fried! I'd shelled out a fair chunk of cash so I have started looking at other options. Function is more important than form although most of the candidates I have seen do look very similar
I'd be interested to hear if any of you have found a suitable alternative
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Re: Dynamo Alternatives
how about using a 6v alternator with internal regulator? not look correct but it way more reliable.
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Re: Dynamo Alternatives
Or bite the bullet and get a correct wartime genny. There are some for sale, postage is terrible, but if you have a mail forwarding co. things get cheaper.
Or if your look alike burnt out unit is correct looking, take it to an old time genny shop not an auto electrician.It needs to be wired for the B circuit if u fix it.
x it
Adam
Or if your look alike burnt out unit is correct looking, take it to an old time genny shop not an auto electrician.It needs to be wired for the B circuit if u fix it.
x it
Adam
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Re: Dynamo Alternatives
I have been thinking about this for a while----maybe someone with knowledge will help this along.
The voltage regulator controls the voltage output of the generator or alternator. On the old generator system it also controls the voltage cut out to prevent reverse current to the gen when the engine is not running ( Gen is not putting out ) This is not needed on an alternator because of the internal diodes.
Could a 12 volt alternator that uses an external regulator be used with a 6 volt regulator ? Seems like it might reduce the amp output of the alternator also----but if you are using a 60 or 100 amp unit ---should be enough.
Since the alternator is activated/regulated by "positive" power input to the field a circuit "B" type regulator is needed. Could the original jeep regulator be used if (1) the armature wire was removed (2) field wire was connected to the alternator field (3) the battery wire was removed to from the regulator and connected directly to the alternator hot wire stud (4) a switched wire (in parallel with the ignition wire) is attached to the armature terminal of the regulator. This parallel system is to carry the few amps needed to operate the voltage regulator and prevent 'feedback' to the ign coil --keeping the motor running.
Since I am not familiar with the internal routing of this original regulator step (4) may be incorrect -- might be instead be the BAT terminal. Again, I am hoping someone with more knowledge will step in and add to this thread JimT
The voltage regulator controls the voltage output of the generator or alternator. On the old generator system it also controls the voltage cut out to prevent reverse current to the gen when the engine is not running ( Gen is not putting out ) This is not needed on an alternator because of the internal diodes.
Could a 12 volt alternator that uses an external regulator be used with a 6 volt regulator ? Seems like it might reduce the amp output of the alternator also----but if you are using a 60 or 100 amp unit ---should be enough.
Since the alternator is activated/regulated by "positive" power input to the field a circuit "B" type regulator is needed. Could the original jeep regulator be used if (1) the armature wire was removed (2) field wire was connected to the alternator field (3) the battery wire was removed to from the regulator and connected directly to the alternator hot wire stud (4) a switched wire (in parallel with the ignition wire) is attached to the armature terminal of the regulator. This parallel system is to carry the few amps needed to operate the voltage regulator and prevent 'feedback' to the ign coil --keeping the motor running.
Since I am not familiar with the internal routing of this original regulator step (4) may be incorrect -- might be instead be the BAT terminal. Again, I am hoping someone with more knowledge will step in and add to this thread JimT
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Re: Dynamo Alternatives
Wartime units are pretty much non-existent in the UK. Most get snapped up and people are perhaps understandably reluctant to sell them. They might be around in the US but the postage and delivery time would be horrendous. There are a few repro units on the continent but they are €500 plus taxes, fees and shipping.Adam wrote: ↑Tue Dec 13, 2022 2:33 pmOr bite the bullet and get a correct wartime genny. There are some for sale, postage is terrible, but if you have a mail forwarding co. things get cheaper.
Or if your look alike burnt out unit is correct looking, take it to an old time genny shop not an auto electrician.It needs to be wired for the B circuit if u fix it.
x it
Adam
As I mentioned, the dead generator I have isn't a proper wartime unit or even an exact repro. As far as I know, there are very few places here that have the parts and expertise to effectively test and service 6 volt parts. Even if there was somewhere up country, once you start paying postage each way things get expensive, not to mention how hard it might be to find correct repair parts.
I wouldn't mind getting a wartime replacement if I could actually find one!
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Re: Dynamo Alternatives
Yes a Gray Ferguson Lucas dynamo would be much cheaper and would do the job with the original regulator… but do not expect to power a military radio jeep with that generator.LJBrzozka wrote: ↑Tue Dec 13, 2022 1:46 amI am in the UK and in need of a 6V dynamo for a 42 MB but they are proving hard to find (or eye-wateringly expensive)
Does anyone have experience with using any post-war Lucas dynamos? I don't mind adapting a bracket to make it fit.
Annoyingly, I bought what was claimed to be a refurbished dynamo for a WW2 Jeep a year or two ago and it does look almost the same except it has two holes on the top where the support arm fits. Anyway, it wasn't working so I gave it so an auto electrician who said it was fried! I'd shelled out a fair chunk of cash so I have started looking at other options. Function is more important than form although most of the candidates I have seen do look very similar
I'd be interested to hear if any of you have found a suitable alternative
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794
serial 164794
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Re: Dynamo Alternatives
[/quote]
Wartime units are pretty much non-existent in the UK. Most get snapped up and people are perhaps understandably reluctant to sell them. They might be around in the US but the postage and delivery time would be horrendous. There are a few repro units on the continent but they are €500 plus taxes, fees and shipping.
As I mentioned, the dead generator I have isn't a proper wartime unit or even an exact repro. As far as I know, there are very few places here that have the parts and expertise to effectively test and service 6 volt parts. Even if there was somewhere up country, once you start paying postage each way things get expensive, not to mention how hard it might be to find correct repair parts.
I wouldn't mind getting a wartime replacement if I could actually find one!
[/quote]
I have NOS wartime generators here in the UK if you want to be period correct give me a shout
Wartime units are pretty much non-existent in the UK. Most get snapped up and people are perhaps understandably reluctant to sell them. They might be around in the US but the postage and delivery time would be horrendous. There are a few repro units on the continent but they are €500 plus taxes, fees and shipping.
As I mentioned, the dead generator I have isn't a proper wartime unit or even an exact repro. As far as I know, there are very few places here that have the parts and expertise to effectively test and service 6 volt parts. Even if there was somewhere up country, once you start paying postage each way things get expensive, not to mention how hard it might be to find correct repair parts.
I wouldn't mind getting a wartime replacement if I could actually find one!
[/quote]
I have NOS wartime generators here in the UK if you want to be period correct give me a shout
- YLG80
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Re: Dynamo Alternatives
Wartime units are pretty much non-existent in the UK. Most get snapped up and people are perhaps understandably reluctant to sell them. They might be around in the US but the postage and delivery time would be horrendous. There are a few repro units on the continent but they are €500 plus taxes, fees and shipping.
As I mentioned, the dead generator I have isn't a proper wartime unit or even an exact repro. As far as I know, there are very few places here that have the parts and expertise to effectively test and service 6 volt parts. Even if there was somewhere up country, once you start paying postage each way things get expensive, not to mention how hard it might be to find correct repair parts.
I wouldn't mind getting a wartime replacement if I could actually find one!
[/quote]
I have NOS wartime generators here in the UK if you want to be period correct give me a shout
[/quote]
Hello be sure to match the generator (externally or internally grounded) with your existing regulator.
There are many posts about that on G503.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794
serial 164794
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Re: Dynamo Alternatives
Thanks all!
I have seen an Autolite tractor generator. It's smaller but would potentially fit so might give that some thought
Also thanks for the heads up about matching up with the regulator
I have seen an Autolite tractor generator. It's smaller but would potentially fit so might give that some thought
Also thanks for the heads up about matching up with the regulator
- dpcd67
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Re: Dynamo Alternatives
There is nothing in the SNL called a dynamo. Is that the Generator? If so, there are alternators stuffed into Generator bodies so cosmetically, they look original. Yes, your regulator would no longer be functional; just for decoration.
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Re: Dynamo Alternatives
Hello,
How about locating an NOS French 6 Volt generator for your jeep, they are likely plentiful in Europe, and I just bought 2 in the USA for my jeeps.
I also bought an NOS WW2 Autolite on USA ebay, and there is another one listed, but it was expensive and about double the price of the French made 6 Volt generators that I bought.
But at $500, it is not really outside the realm, when you add the rebuilding costs, and shipping 2 ways to a rebuilder of a bad generator.
Good luck !!
In England you are a lot more likely to find a nice French 6V WOF generator that looks just the same as the original.
You can even swap the tags if desired.
Best Regards,
Ray
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Re: Dynamo Alternatives
Yes it is the generator. In Britain we normal refer to them as dynamos as a generic term for that kind of generating unit!
I have seen some of the visually similar units with the built-in regulator but not for 6 volt as far as I can remember
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Re: Dynamo Alternatives
Thanks! Someone dropped me a message as he has a load of French rebuilt units. Still not cheap but at least they are in the UK so I don't get rinsed on the postage!70th Division wrote: ↑Thu Dec 22, 2022 9:16 amHello,
How about locating an NOS French 6 Volt generator for your jeep, they are likely plentiful in Europe, and I just bought 2 in the USA for my jeeps.
I also bought an NOS WW2 Autolite on USA ebay, and there is another one listed, but it was expensive and about double the price of the French made 6 Volt generators that I bought.
But at $500, it is not really outside the realm, when you add the rebuilding costs, and shipping 2 ways to a rebuilder of a bad generator.
Good luck !!
In England you are a lot more likely to find a nice French 6V WOF generator that looks just the same as the original.
You can even swap the tags if desired.
Best Regards,
Ray
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