Adam Stouffer wrote:
We're trying to troubleshoot an ancient power supply for a high pressure
mercury arc lamp. Theres a SOLA transformer that feeds into a rectifier
stack and then two large filter caps. The output from the filter caps is
only 60 vdc while they are rated for 150 wvdc. Every SOLA I've seen had
a 115 vac regulated output. Theres no specs except for the SOLA part
number "21-877". Do they all output 115 vac or were there lower voltage
models? My guess is that the oil capacitor has gone bad and its no
longer regulating correctly. Any thoughts?

Could be, stick it on a bridge and see. Is it leaking?

It may not have a 115vac regulated output. Some of the Sola
transformers were step-up or step-down. A call to Sola should identify
the part number. I have seen some with 24VAC secondaries.

Is the thing rated for 60cycle use? A 50 cycle ferroresonant transformer
will go berserk on 60 cycle power.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."