[BC] 3 phase to single phase conversion

[Broadcast List USER]

Solid state converters are pretty darned efficient.  They are not the  
problem they used to be.

Rotary converters are a maintenance issue, and are only about 80%  
efficient, but can really help site reliability.  MANY hardened sites  
use them because it is pretty impossible for spikes, or even EMP go  
go through the drive shaft!  Some have heavy flywheels and work as a  
UPS for a short time.  I owned some that had a three phase motor, a  
three phase generator, a 400 pound flywheel, a clutch and a diesel  
engine.  If the power went out, the engine started, the clutch pulled  
in and took over.  The down side is that just powering tower lights  
they added about $80 to the power bill.

Still, I would say the best thing would be real three phase power.   
If this is not possible, or WAY too expensive, a single phase  
transmitter is generally the best way to go,

On Feb 8, 2009, at 10:18 PM, broadcast-request at radiolists.net wrote:

> Message: 7
> From: WBRadiolists at aol.com
>
> In a message dated 02/07/2009 9:01:24 PM Eastern Standard Time,
> Towers at mre.com writes:
>
>> Other than that, you're limited to the devices which locally  
>> produce 3
>>  phase by motor/alternator or electronic generation.
>
> I would *strongly* recommend modifying the transmitter over  
> obtaining a phase
> converter! Your electric bill will increase substantially by having  
> to run
> that thing. It is a motor and generator in one housing. Big, heavy,  
> and often
> noisy. There are bearings and brushes that will wear out and require
> maintenance/replacement on a regular basis. (Remember: this thing  
> is going to be running
> 24/7.)
>
> Willie...
> </HTML>