"Adam Stouffer" wrote in message
...
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?


Adam
Sola transformers were made for all sorts of output
voltages. The caps do go bad which changes the volage at the
output and can prevent the transformer from regulating. I
also have a couple of old Sola's which do not regulate at
the correct voltage despite new caps of the right value. I
have never been able to find out what causes this.
Note that the capacitors must be non-polarized types.


--

--
Richard Knoppow
Los Angeles
WB6KBL