Gday Jeremy, there are some old Veglia gauges getting round like your after that hang down and go left to right.
I think some VW used them as well as Lancias ect



"We are but a grain of sand on the beach of life"

while you are about it get it converted to read around 100 or 120 amps, because if you put in a more powerful alternator it will go to at least 85. and the standard alternator only just services the standard system if you run amplifiers or extra lights etc the original alternator is underpowered.

All you would need do is remove the top guauge/movment from the other side of the GTS dash, it will screw straight in, and away you go.

Also I still say your ammeter can be easily converted to a voltmeter, so when you get this sorted would be prepared to take your ammeter and try to converted.

Warren

Edited by user Friday, 26 March 2010 6:49:21 PM(UTC)  | Reason: Not specified

Hi all

My instrument guys been through the info you sent last time Warren and swears he cant do it.

When its sorted Id love to send you the amp meter mechanism and see how you go.

Bob - Hes looked at installing an aftermarket voltmeter but theyre either too big and clash with the fuel guage or swing the wrong direction. This layout is not a common one.

Ive tried to get a temp guage from a HT/G guage and exhausted all options to date, although there are now some possibilities on ebay.

There are some 70 Fords/Chryslers that also have the same arrangement and Im checking them out as well.

Let you know when its done.

Cheers

Jeremy

The G will roll again....

Edited by user Saturday, 27 March 2010 7:51:41 AM(UTC)  | Reason: Not specified

Well I spoke to my instrument guy (dad) to confirm 100%.

He agrees with me, the VDO ammeter is a moving coil instrument and can easily be converted to voltmeter. His comment was why would you want to, and we discussed the shunt size etc as has already been covered.

After a short discussion we came up with the folowing options.

To leave as an ammeter:

1) get another GTS dash and cut the shunt out and place in parallel with the current movement.
2) The shunt current is not the maximum current the shunt can handle and would be well under maximum power rating, so would easily handle the 80 amps (double the current would produce 4 times the power but we estimate the power consumed by the shunt would be as low as 8mW, so would become 32mW). So remove one leg of the movement from the shunt, measure the resistance of the movement with an accurate low reading ohm meter or wheatstone bridge, then place a resistor of this value in series with your movement (between the open leg and the shunt) 1/4 watt would be more than adequate.
3) Measure instrument resistance as pointed out above, plus measure full scale deflection current of movement. Send this info to any reputable instrument place and they will send you an 80A shunt to suit the meter, replace your 40A shunt with this.

We also believe that your 80A alternator is not likely to put anywhere near 80A into the battery (ammeters ony read charge and discharge current of the battery, not alternator current).

Convert to voltmeter:

VDO moving coil meters are sealed and the shunt shall be external to the movement, remove the shunt and place a resistor in series with the movement. The needle is pressed on so can easily be removed and place further to the left.

Information from Nepean instrument services, which ceased operation many years ago. He was the VDO service agent during the late 60s early 70s.

final note, dad remembers having a new guage set for an HT/G GTS dash, from when my brother had his HG, not sure which side, he is going to have a look to see if he can find it. If he does and it is the left side I shall open it up and convert it, with pictures for you.

Warren

Edited by user Sunday, 28 March 2010 5:00:31 AM(UTC)  | Reason: Not specified