[Healeys] MORE: Lucas electronic voltage regulator

Alex alexmm at roadrunner.com
Sat Nov 3 14:23:44 MDT 2018

While a solid-state regulator has no moving parts, and may provide 
tighter regulation than a classic old-fashioned mechanical regulator, 
keep in mind that the components on the solid-state circuit board are 
subject to shock, vibration, and temperature extremes.

The substrate itself (the printed circuit board) is also subject to 
these factors. Under the bonnet is a hostile environment for electronics.

 From the photos, it's clear the integrated circuits are small-outline 
surface-mount devices. The pins on these ICs are very small and on a 
fine pitch (close together).   Also, ICs are rated in three categories: 
0-70 degrees C, -25 to +85 degrees C., and -55 degrees C to +125 degrees C.

These three categories are dubbed "commercial," industrial," and 
"military," respectively. Which temperature-range devices are used on 
these boards?

Also, notice the sub-board, which looks like a plug-in. Separable 
interconnects are also subject to failure due to oxidation and vibration.

Just some thoughts.

== Alex in Maine, 1960 BT7, "The Blue Mainie"

On 11/3/2018 11:57 AM, Bruce Steele wrote:
> Thanks, Chris.  I appreciate all the input.  I received the diagnosis 
> on my generator Friday, and I’m going to proceed with having it 
> rebuilt.  I’m also going to contact Dean Sprague of Vintage 
> Mecha-Tronics (www.vintagemechatronics.com 
> <http://www.vintagemechatronics.com>) this week regarding their 
> electronic regulator.  The quality of the Lucas electronic unit is 
> suspect based on the comments received, which are echoed in the 
> information on Mecha-Tronics website.
> Bruce Steele
> Brea, CA
> 1960 BN7
> *From:*Chris Masucci [mailto:cmmasucci at gmail.com]
> *Sent:* Wednesday, October 31, 2018 4:19 AM
> *To:* healey.nut at gmail.com
> *Cc:* healeybruce at roadrunner.com; Healey List <Healeys at autox.team.net>
> *Subject:* Re: [Healeys] Lucas electronic voltage regulator
> In my opinion, whether you need more current supply or not isn't the 
> primary reason to go with an alternator or an electronic voltage 
> regulator.  Either will provide a more stable voltage to the system, 
> which is good for anything electrical including points and coils, 
> overdrive solenoids, fuel pumps and especially electronic ignitions 
> like pertronix etc..  If you have an electronic tach like on the later 
> cars, it will be more stable too and happier with a cleaner power 
> source. I would use the electronic regulator if you decide to rebuild 
> the generator.
> Chris
> On Wed, Oct 31, 2018 at 6:08 AM Alan Seigrist <healey.nut at gmail.com 
> <mailto:healey.nut at gmail.com>> wrote:
>     I would just rebuild the genny. are you planning on running a 300
>     amp stereo system in your car or something?
>     On Wed, Oct 31, 2018 at 9:13 AM Bruce Steele
>     <healeybruce at roadrunner.com <mailto:healeybruce at roadrunner.com>>
>     wrote:
>         Somewhat related to my prior post.  Should I decide to rebuild
>         the generator, anyone have experience with the electronic
>         voltage regulator?
>         https://www.bpnorthwest.com/voltage-regulator-digital-lucas-screw-in-terminal.html
>         Bruce Steele
>         Brea, CA
>         1960 BN7
>         *From:*Michael MacLean [mailto:rrengineer.mike at att.net
>         <mailto:rrengineer.mike at att.net>]
>         *Sent:* Tuesday, October 30, 2018 11:05 AM
>         *To:* Bruce Steele <healeybruce at roadrunner.com
>         <mailto:healeybruce at roadrunner.com>>; Healeys at autox.team.net
>         <mailto:Healeys at autox.team.net>
>         *Subject:* Re: [Healeys] Accuspark Dynamator
>         Cheaper to get your generator rebuilt.  Re-install, then drive
>         it.  Not a big deal.
>         Mike MacLean
>         On Tuesday, October 30, 2018 7:36 AM, Bruce Steele
>         <healeybruce at roadrunner.com
>         <mailto:healeybruce at roadrunner.com>> wrote:
>         Hi, all. My generator failed and I'm considering my options.
>         Anyone have any input on the AccuSpark Dynamator (which is an
>         alternator in a dynamo case)? Peter Rosesinstalled one
>         recently, and suggested I consider it. The north American
>         distributor is Brit Bits in Edmonton, Alberta, Canada. I'd
>         prefer retaining the traditional look of the generator over an
>         alternator. Of course, rebuilding the generator is an option,
>         but my car is not concours so that is not really a
>         consideration. Certainly the higher output of the alternator
>         (the Dynamator is 45 amps) is a significant improvement to
>         drive all those electrical components on our Healeys.
>         Bruce Steele
>         Brea, CA
>         1960 BN7
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