Alternator

Cycling the switch worked on a couple occasions. Did not work at all on the last flight. I will start it early in the morning next week as I start opening it up for annual to see if the temperature has anything to do with it. I am cautiously optimistic that it isn’t the alternator itself as when it works, it works well. So that hopefully leaves the switch, wiring, and voltage regulator. Thanks for your input.

Depending on the installation, you could also be experiencing either:

1. An over-voltage "crowbar" where the alternator output is stopped due to an over-voltage event. The crowbar unit may be reset by cycling the switch.

2. With all this hot weather, a voltage regulator overheating event can act the same way.

If it were happening to me, I'd attach a small thermocouple  to the voltage regulator and monitor it's operating temperature. Pretty cheap and easy, and shouldn't require taking anything apart to at least verify or eliminate a regulator temp issue. 

Hi. I have noticed on two different occasions that I have lost my charging from my alternator. Cycling the alternator switch seems to bring it back. Could the switch be worn/weak? This is a 1960 Forney with 0-200 and alternator conversion. Thanks in advance. Mike