Re: Thoughts on PC Based Control Retrofit....now transformers.

--- In CAD_CAM_EDM_DRO@e..., "Tim Goldstein" <timg@k...> wrote:

> Dan is offering 24 V 10 amp transformers in his power supply kits.

The past

> talk on microwave transformers revolved around cutting off the high

voltage

> winding and rewinding to get the voltage you want. Total uneducated

guess is

> that a rewound microwave transformer built to give 48 V out would

be good

> for 10 - 15 amps.

Don't know if this info is relevant to the US but here in the UK we
have 240 to 110v transformers for using power tools on site. These
come in various outputs as regards aperage. Usually 2Kva to 6KVA what
ever that means. These are very heavy and encapsulated in usually a
yellow plastic case, made to be dropped from scaffolding on a
building site - no I'm not joking. Inside they have a centre tapped
secondary so you get 50v - 0 - 50v.
50 x 1.4 for a full wave DC supply will give you 70v DC.
Good thing about these is they are plentyfull. Any car boot sale will
reveal at least 4 and the going price is usually 20 to 25 UKP each,
sometimes less.
Do you have something like this in the US??

John Stevenson
Posted 8.17 UK time [ checking Egroups listing }