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Euro 175.- to get concerted from single phase service to 3 phase service in the Lowlands. For that money you'll get:
3 fuses
a new 3 phase digital power/kWh meter
3 x 35 amps @ 400 VAC ( 42 kW AC, gud for 25 kW RF output ) = the same

monthly fee compared to single phase service.
Cheers, Dick
PA3DUV
----- Original Message -----
*From:* R L Measures <mailto:r@...>
*To:* ham_amplifiers@...
<mailto:ham_amplifiers@...>
*Sent:* Wednesday, October 04, 2006 2:38 PM
*Subject:* Re: [ham_amplifiers] Re: 3 - phase HV supply
Sometimes, a 3-0 service has a monthly minimum charge that will blow
the hat clean off of one's head.
On Oct 4, 2006, at 5:26 AM, ad4hk2004 wrote:

> Being that my Bridgeport mill is 1.5 HP, I use a rotary convertor to
> change the 220X1 to 220X3... Not perfect but it works...
> I did consider asking Consumers Power Co. to give me a price for 3
> phase to the shop... But getting underground power to my house
> required my atty petitioning the court for a 'show cause' order -
> insiders at the company tell me their field supervisor is still
> smarting from the corporate VP giving him a public chewing out over
> that one - I suspect the bill would spin my hat...
>
>
>
> denny
>
> --- In ham_amplifiers@...
<mailto:ham_amplifiers%40yahoogroups.com>, "craxd" <craxd1@...> wrote:
>>
>> A 3 phase service is mighty fine to have if one can afford to
have it
>> put in. I've not checked on the price in a while, but back in
1985, a
>> 200 amp 220 volt service ran around $2000 from the power company for
>> the transformers, and the service entrance, meter base, etc was
>> extra.
>> I was having one put in at my machine shop building I had at the
>> time.
>> I wish I had the health back to do all that again. At the time I had
>> an electric shop running, and a machine and assembly shop a
couple of
>> miles up the road. I used to design and build custom fab machinery
>> for
>> the railroads. Sure is a good business to be in. Anyhow, 3 phase can
>> sure make life a lot easier if you plan on running reverseable
>> motors,
>> and anything else that needs some umph behind it. One could do it
>> with
>> a pony motor, but I'm not sure how good that would work.
>>
>> Back in the old days, and some do this now, is run a generator
>> (really
>> an alternator without the rectifier stack) in a mobile supplying
LV 3
>> phase to run a HV transformer. That get's you out of running an
>> inverter. A certain company down in Memphis, Tn used to supply a
>> mobile kW (1800 PEP out) with the generator that way. I here about a
>> guy in Florida building these today, and was buying the transformers
>> from Galaxy Transformer. I recon he's built a few with tubes with
>> handles. Of course you need enough engine to run it too.
>>
>> Best,
>>
>> Will
>>
>>
>> --- In ham_amplifiers@...
<mailto:ham_amplifiers%40yahoogroups.com>, "Peter Voelpel" <df3kv@>
>> wrote:
>>>
>>> To achieve 1,5% ripple from a 6-pulse power supply of 5KV at 3A you
>> will
>>> need a capacitor of 0,32F.
>>> Without any cap ripple will be 4%.
>>> You will not here any hum from a transmitter without capacitor in
>> the
>>> 6-pulse capacitor when using sideband transmissions.
>>> From a carrier you here little hum on zerobeat.
>>>
>>> The formula to find C for the 3-phase bridge circuit is the same as
>> for any
>>> other circuit, just calculate C from XC by using 300Hz in the
>> formula.
>>> How the transformer is connected does not matter, usually the
>> primary will
>>> be delta for best efficiency and the secondary will be star
>> connected.
>>> You will have 2 diodes per leg. The voltage across one winding is
>> dc/sqrt6.
>>>
>>> I my 7KV 4A CCS P/S I use UGE1112AY4 diodes by IXCYS, 3 per leg,
>> just scewed
>>> one into the next.
>>>
>>> <>
>>>
>>> The transformer secondary is 5KV +/-5%, +/-10% phase to phase, or
>> 2887V
>>> across one winding.
>>> I use 2F 10KV for smoothing and a crowbar overload circuit
>>> with it.
>>>
>>> 73
>>> Peter
>>>
>>>
>>> ________________________________
>>>
>>> From: ham_amplifiers@...
<mailto:ham_amplifiers%40yahoogroups.com> [mailto:
>> ham_amplifiers@...
<mailto:ham_amplifiers%40yahoogroups.com>]
>>> On Behalf Of pentalab
>>>
>>>> Then, if we talk 3-phase supply and 6-puls rectifying,
>>>> lets say around 5 kV DC potential, how much glitch C
>>>> is needed to achieve 1.5 percent ripple?
>>>
>>> ### Dunno. You would only have 5% ripple with NO cap.... and
>>> with a resonant choke set up.....you probably wouldn't need any
>>> C at all ! [3 phase]
>>>
>>> ### IF no resonant choke setup... and just a straight C input
>>> filter.... I'm guessing around 5-16 uf would be plenty. It
>>> would also highly depend on the load.
>>>
>>> ### I haven't found any formulae for a C input filter HV
>>> supply........ with 3 phase. I don't have access to 3 phase....
>>> so never pursued it. It would be the ultimate setup. IF you
>>> find anything... let me know... as I'm most interested. Somebody
>>> is going to ask me to engineer one for em... so I had better
>>> research it.
>>>
>>> ### I did see some info on C input 3 phase HV supplies some
>>> where.... it's in Orr's older books.... but not alot of info.
>>> Seems to me he had the 3 x primary's connected in a "Delta".....
>>> and the 3 x secondary's tied in a.. "star". The rectifier set
>>> up... if I remember, sorta looked like just 2 x diodes per sec
>>> winding... one flipped around If I remember. The RMS voltage
>>> per sec winding vs no load HVDC output is what threw me.
>>> With say a 1 kv sec.... I'm positive... the OCV hv wasn't 1414
>>> Vdc. [I may well be wrong with this.. just going by memory]
>>>
>>
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R L Measures, AG6K, 805.386.3734
r@... <mailto:r%40somis.org>, , rlm@...
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