First test of Hughs 4ft alt.

[Jerry]

I joined the alt and the prime driver test motor today. I did a few voltage test to confirm proper output for both star and "Jerry Rigged".

The #s are right on where they should be. Now I can add the fullwave bridge rectifiers and continue with all the other testing.

Here are a few pictures. First I brought the rpm up till the ac voltage per coil is 5v.

These are no load tests. Next I configured the alt star. Star produce 17.2 volts between any 2 connection of 3 phase.

"Jerry Rigged" produced 20 volts on any one of the phases.

Here are the pictures.

This is the 5 volt 1 coil.



This is the star reading.



This is the "Jerry Rigged" reading.

OK, Testing continues.

                            JK TAS Jerry

[electrondady1]

jerry,

using this construction method,

 how do you set the mag/ coil clearance.

on one of the photos there were a few paint stir sticks laying around.

i am guessing that you fix your stator tight to the speaker chassis and then set the rotor position using some spacers and then lock it in place with those collars?

[Jerry]

There are 2 alin set screws on the shaft to hub adaptor. I just slide the rotor to the desired position the tighten the set screws.

Yes the stator is secured to the speaker basket.

I did some no load DC voltage test today.

I ran the rpm up till one coil mesured 5 volt. This happened at 492 RPM.

In star at this RPM dc output is 22.5 volts. In "Jerry Rigged" the voltage is 25.5.

I think the real diferance will show up under load. There is a allmost sign wave shape on the scope.

                             JK TAS Jerry