[Boatanchors] 3-phase for BA transmitters?

[J. Forster]

There are very good reasons for using 3 phase.

Mostly, the power supply requires less energy storage in the filters,
because unfiltered 3 phase has only about 4% ripple, hence smallere
capacitors.

Also, if a B+ fault happens, there is less energy to dump into an arc.

-John

================

> Hi Charles - Good question - I've got a 1950's vintage Navy
> transmitter AN/URT-3 that runs a 4-400 final at 100w output on 115v
> 1-phase - the 500w "booster" section (bigger p/s & modulator) requires
> 230v 3-phase. There are several other miitary surplus transmitters
> (500-1000w) that require 230v 3-ph for the high-power sections. Yeah,
> I could replace the HV supply but I really like keeping these things
> original if possible.
> cheers,
> Nick K4NYW
> www.navy-radio.com
>
> On Sun, Nov 18, 2012 at 5:13 PM, Charles Ring <w3nu at roadrunner.com> wrote:
>> What is there, useful to hams, that requires 3 phase power?
>>
>> 73 de W3NU
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