The AM Forum

I picked up this Kepco Model 103 power supply at Axeman Surplus in St. Paul for $40 the other day. It's clean and it works perfectly. The company even has the 4 page tech manual for it on their website...

http://www.kepcopower.com/support/103-model.pdf

It turns out that it was their first product back in 1946...

http://www.kepcopower.com/kephis.htm

I always like checking out the history on this old stuff. I did send a message off to the company to tell them it was still in service. Customer service wasn't even aware that they'd ever made such a thing even though it's listed on their history page along with the link to the manual. It was probably built before they were born!

It gives me 0-300 vdc @ 75 ma on both B+ lines, +/- bias 0-50 vdc @ 5 ma and 6.3 vac @ 5 amps. I measured 0-530 vdc on both channels with no load and 80 volts no load on the bias channel.

Someone was using this pretty recently since it had no dust at all in or on it.

It'll be very handy for breadboarding new circuits.

The thumbnails will enlarge if you click on them...

(http://img440.imageshack.us/img440/4529/img6495tt8.th.jpg) (http://img440.imageshack.us/my.php?image=img6495tt8.jpg)

(http://img522.imageshack.us/img522/1309/img6476xh7.th.jpg) (http://img522.imageshack.us/my.php?image=img6476xh7.jpg)

(http://img522.imageshack.us/img522/2962/img6462tx8.th.jpg) (http://img522.imageshack.us/my.php?image=img6462tx8.jpg)

It came in a nice Bud cabinet too!



 

Very nice...Are those blue caps from the 40's?

This was built from 1946 to sometime in the 1950s but hopefully I'll hear back from the company and they can tell me by serial number. I haven't measured ripple yet, or leakage current.