Batt eliminator question

[drøn]

This might have been answered before. If so please hand me a link.
I fitted a battery eliminator to my GT500 and blew all the lamps. The voltage is nealy 40.
With the old battery in the voltage is within spec.
I want to use the eliminator. Do I need a certain kind of regulator?
Thank you

[tz375]

GT500 had a regulator in the circuit and it is necessary to use one. Is yours still attached but not working or is it missing?

T500 used a different system.

[drøn]

There is a regulator and I'll go check it later, but isn't the correct voltage measurement on the battery suggesting that it is working?

[drøn]

Apparantly it's a T500 style regulator (3 wires) and it doesn't work properly. I measured according to per norstedt's guide.
Somebody once reccomended a modern combined regulator and rectifier with a guide to wire it in, but I can't find the thread. Do somebody remember?
Also, Why would it work with the battery? Does the battery itself act as a regulater?

[jabcb]

The battery acts as a voltage regulator on the T250/T350/T500. The T250/T350 don't even have a voltage regulator. The T500 has a little more alternator output and uses a voltage regulator. But the T500's voltage regulator might not have enough capacity to control voltage without a battery. The GT500 would be similar.

I'm using a Tympanium regulator/rectifier on my T500. Costs around $50 on eBay.
This topic shows how I mounted it & a modified wiring diagram:
viewtopic.php?f=2&t=4858&hilit=t500+tympanium&start=15
Updated wiring diagrams are shown here:
viewtopic.php?f=29&t=5963&p=117596&hili ... am#p117596

Another good choice is the Oregon Motorcycle Parts rectifier/regulator VRRPM2:
http://www.oregonmotorcycleparts.com/VRRPM.html

There are some other brands of regulator/rectifiers that might be more readily available in Europe.

[drøn]

That's it. Thanks a lot.
Is the GT500 a two phase system?

[jabcb]

Technically, its a two-wire single-phase alternator with a lighting coil. But its also referred to as a two phase alternator with a lighting coil.

Just to make things a little more confusing, there actually are two phase alternators that are wired up differently & work differently.

[drøn]

Can any of you guys see wich one if any of these will work on my application? http://www.electrexworld.co.uk/acatalog ... r_206.html" onclick="window.open(this.href);return false;
Based on the wiring diagrams the gt500 is a bit different from the triples.

[jabcb]

Hard to say which one because they don't give specifications but tell which one to use base on the bike you have.

Try looking for a single phase rectifier/regulator for a vintage Triumph.
http://www.ebay.co.uk/sch/i.html?_nkw=t ... ycle_Parts

Rectifier/regulator should have 4 wires: 2 yellow for alternator, red & black. Don't get one with 3 yellow wires.

When wiring it up, just remember that many old British bikes were positive ground & the T500 is negative ground.

[drøn]

Hard to say which one because they don't give specifications but tell which one to use base on the bike you have.

Try looking for a single phase rectifier/regulator for a vintage Triumph.
http://www.ebay.co.uk/sch/i.html?_nkw=t ... ycle_Parts

Rectifier/regulator should have 4 wires: 2 yellow for alternator, red & black. Don't get one with 3 yellow wires.

When wiring it up, just remember that many old British bikes were positive ground & the T500 is negative ground.

Jab, You're a saint.