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11
Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by RoddyMac on Today at 09:24:02 AM »
Quote
You are purchasing a Smiths Gauge Voltage Stabiliser For MGB, Triumph TR4 & Spitfire MK1-3

 Regulated 10 volt supply - Positive Earth ONLY

If you do a search for the part number Dilkris posted, it is indeed a negative earth unit.  The NEG in the part number should be an easy tell.  From what I recall, the difference between various part numbers was the obvious positive/negative ground, and mounting tab location.  For the electo-mech units, you do have to keep them in the correct orientation, hence the arrow or the word TOP, the newer solid state units should be able to be mounted in any orientation.  Also, some units are still electro-mech, not all are solid state.
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by 4129R on Today at 09:15:20 AM »
Quote from: Dilkris on Today at 09:05:55 AM
Quote from: 4129R on Today at 09:00:46 AM
You are purchasing a Smiths Gauge Voltage Stabiliser For MGB, Triumph TR4 & Spitfire MK1-3

I'm lost - where do MGB's, Triumph TR4's and Spitfires come into the equation.   :confused:
What have I missed?
Lucas 12v voltage stabilisers on eBay.
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Garage / Re: Removing Stuck Brake Caliper Pistons
« Last post by Dilkris on Today at 09:13:39 AM »
Quote from: EuropaTC on Saturday,October 23, 2021, 12:24:30 AM
Quote from: 4129R on Saturday,October 23, 2021, 12:13:30 AM

The only thing I wouldn't use is air although I suppose if the calipers weren't split the piston can only fly as far as the other side of the caliper body.

Brian

I second that - I only used air once on stuck Triumph T160 front disc caliper pistons  - they came out but it was bl**dy dangerous and never again.  :(
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by Dilkris on Today at 09:05:55 AM »
Quote from: 4129R on Today at 09:00:46 AM
You are purchasing a Smiths Gauge Voltage Stabiliser For MGB, Triumph TR4 & Spitfire MK1-3

I'm lost - where do MGB's, Triumph TR4's and Spitfires come into the equation.   :confused:
What have I missed?
15
Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by 4129R on Today at 09:00:46 AM »
Whoopsie..........

You are purchasing a Smiths Gauge Voltage Stabiliser For MGB, Triumph TR4 & Spitfire MK1-3

 Regulated 10 volt supply - Positive Earth ONLY

I never knew those cars were +ve earth.
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Garage / Re: What are we missing, what should I make on a VMC?
« Last post by Richard48Y on Today at 08:53:53 AM »
I have not seen any for Webers on the Cross-Flow Renault.
In theory I can make almost anything the VMC would have done on my manual machine, just much more slowly.
The VMC is still a possibility if I can raise funds again.
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by Dilkris on Today at 08:44:33 AM »
This is interesting - I have just been along this journey. Couple of days back I posted "Dilkris Update - Back at it!" (but I put it in 'Technical Articles' which was probably wrong) - anyway it was about me starting the engine finally after some time away from the project. 
I wired up a temporary temp gauge circuit,(without the voltage regulator), and upon the engine running it was showing 130 degrees - I then realized that this 'magic cube' was not an option as it does, amongst other things it seems, reduce voltage to the temperature and fuel gauges to 10V.
I have now installed it, (original item - see pics), and temperature now stabilizes at just over 90 degrees.
If you need any more readings please let me know as it is presently very accessible. 
Also in researching this component on line - (it was made by Smiths Motor Accessories BR1311/00) - it seems that how it is mounted is important to it's operation - ie: it appears it can only be mounted one way - please don't ask me why - I followed the instruction and it works...  :confused:
Please refer photo of BR1307-00NEG which I assume super cedes the original - read description               
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by BDA on Today at 07:58:32 AM »
Yeah, it appears that your stabilizers are toast but it's curious that your new one is since I believe all the new ones are solid-state which should be much more reliable than the old ones (I believe they were electro-mechanical but I think the articles I posted and mentioned explain that pretty well). Anyway, your new one is clearly busted and you should send it back or just try again with another.

There is an article on building your own if you want to go that route (http://lotus-europa.com/manuals/misc/electrical/vregulator.gif). I think the instructions in that article were published before the solid state stabilizers were commercially available but from what I can tell, the instructions tell you how to make what you get when you buy a commercially available stabilizer.
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by 4129R on Today at 07:45:53 AM »
Quote from: BDA on Today at 07:05:26 AM
In general, I believe the voltage stabilizer is designed provide a stable (max?) voltage of 10v. Since I’ve already exceeded my understanding this subject, I’ll refer you to an article that explains it better than I: http://lotus-europa.com/manuals/misc/electrical/gauges.html

Be sure to check out the link that explains how a “Lotus gauge works.”

Thanks for that information. A stable +10v comes out of the I terminal on neither stabilizer. 
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Garage / Re: How Does a Voltage Stabilizer Work?
« Last post by 4129R on Today at 07:33:37 AM »
I took both stabilizers into the garage and plugged them into a charging battery.

The voltage going in was around 13.5v.

On the old stabilizer, the voltage coming out at the I terminal fluctuated repeatedly from 12.1v down to 0 then back up to 12.1v at around a 1 second cycle.

On the new stabilizer there was 0v output all the time at the I terminal.   
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