[BC] Re: 12 Pulse (Phase) Power supplies

[DHultsman5@aol.com]

In a message dated 5/13/05 12:45:40 PM Central Daylight Time, 
broadcast-request at radiolists.net writes:
Three-phase full-wave gives you six pulses per cycle, and requires six 
rectifiers, total.

Three-phase full-wave zig-zag gives you twelve pulses per cycle, and 
requires twelve rectifiers, total.
Peter
 As I recall the ripple frequency was 720 Hz.,  which was easier to filter 
and dropped the values of the LC filters, reducing the size.  Silicon diodes 
became cheaper than the iron and copper and at the same time you got better peak 
performance on low frequency audio,  especially with older plate modulation, 
because of the beefier power supply available.  The later PWM (PDM)  
transmitters were all using the extra rectifiers.


Also the AEL 25 kW. FM used the 12 pulse or (Phase) power supply as I recall.

Dave
The Continental 315R-1 used 12 rectifier modules in the power supply.