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Current rating will be the same as at 240 volt.
Voltage rating will be 1/2.
Power rating will be 1/2.
% sag will be twice what it was at 240 volt.
Sag probably will probably not be a problemill.

Robert A. Pease in his book Troubleshooting Analog Circuits, page 68 describes a low cost circuit for testing fast recovery rectifiers. This circuit requires a high speed oscilloscope and a few discreet components. Troubleshooting Analog Circuits is a good book and reasonably priced. I strongly reco...

If you are trying to design a circuit with the highest efficiency then a resistor (or transistor biased as a resistor) cannot be used. An inductor is probably the best approach with a transistor duty cycle modulated to limit the current. You could search the web for boost or buck convertors. The cir...

IC Op-Amp Cookbook by Walter G. Jung is the book you should get.

The best zeners are usually around 6 or 6.2 VDC. Comparing 1N5233 (6.0 V) and 1N5242 (12 V)<p>1N5233 Zzt=7.0 ohm/20mA, Zzt=1600 ohm/0.25mA, Temp Coef=+0.038<p>1N5242 Zzt=30 ohm/20mA, Zzt=600 ohm/0.25mA, Temp Coef=+0.077<p>So depending on the current operated at, two 6.0 volt zeners in series may be ...

Chic, in my opinion, your question is totally acceptable.<p>If you have a function generator, you could set it to 1 hertz and drive relay with it.

Try www.eng-tips.com
This site is more for professional users than hobbyists.

Are you sure it's a motor start and not a motor run capacitor?
Anyway a good source for either of these capacitors is www.grainger.com

Light bulbs sound like a good idea. If you can get to the generator field, then using a separate variable power supply for the field could be the way to go.
The separate variable power supply should not be operated off the generator output.

For best solution search different manufactures products. Thomas Register has list of manufactures. www.thomasregister.com If unable to find standard product, I have used Signal Transformer www.signaltransformer.com 516-239-5777 and Stangenes Industries Inc www.stangenes.com 650-493-0814 for custom ...

One solution, probably the cheapest, but not the best would be to use two transformers. Use transformers with 240 volt primaries and 8 volt secondaries. Series the primaries and parallel the secondaries.
Signal transformer DST-2-16 should work.
www.signaltransformer.com
Good Luck
Carl

Optoelectronics section of Perkin-Elmer appears to have been discontinued?
When searched for VTL5C1 (Part number) got WWW.AIKENAMPS.COM and some other interesting sites.

Google is a wonderful device isn't it. Except I can't find anything on it either. "EG&G OPTOELECTRONICS VACTEC, Optoelectronics Data Book, Photoconductive Cells and Analog Optoesolators (Vactrols) November 1997" has considerable information on this subject. Their address and phone numb...

In the interest of preventing smoke, it might be advisable to put a electric light bulb in series with the coil that you have wound. When the light bulb does not glow, it could be removed. Maybe use a 60 watt light bulb.

For motor-run capacitor try Grainger, www.grainger.com