[Amps] Rectifier

[Thomas Tow]

I just came into a Flotrol Rectifier unit. I have no information, manuals or
anything on this but it is in very very good condition. It came from a radio
station and has been stored for several years, I have no idea of how many.
The old fellow who removed it said it was working just fine when it was
removed and the inside and components look...not new but certainly in
terrific condition.
I really have no need for it but any info would help about specs and the
value of such a beast. This has to weigh at least 150 lbs. 
Here is the info on the front:
Flotrol
Lorain 30 ampere Rectifier
Input 115/230 volts    24/13 amps   Frequency 50-60
Output    56                  30
# Spec 5411-025
Lorain Products Corp
Lorain, Ohio

Any help or ideas appreciated.

Thanks, 73, Tommy WD4K