400 Hz supplies
I have a query.
I am looking for sources for workshop-type 400Hz supplies, both 26V and 115V, with power ratings from 25W to 300 or 400W.
Either surplus, or even circuit diagrams.
Let me explain...
On the one hand, I have queries from people who are bringing 'old' aircraft instruments back to life, which need 26V 400Hz or 115V 400Hz, generally at something like 25 to 50W.
On the other hand I have queries from museums bringing entire simulators back to life, but where they are hampered by some of the bits and pieces (such as supply racks...) never having made the journey from site to museum.....
In that case we're rather talking about several hundreds of Watts.
Neither 'category' can really afford the prices of new "aviation-certified" professional lab equipment. I've done some Internet searches without much success.
Hence my appeal to the TechLog community.
1) Does anybody have pointers/links to sources of surplus equipment of this kind?
For the case of the instruments, even surplus aircraft 28V DC / 400Hz converters would do the job, of course. (DC supplies are cheap.)
PMs are welcome, of course, if you do not want to 'advertise'.
2) If you have read this far... car battery to mains converter schematics (similar principles) are a dime a dozen on the internet. Unfortunately nearly all produce a somewhat rounded square wave and I don't think aircraft instruments would appreciate that very much.
Schematics of circuits that produce something approximating a sine wave are few and far between. But if you know of one... yes please.
Both of my 'categories' will gladly spend some time building a supply to save a lot of money.
Moderators,
I thought this was the best place to ask the question. If you think I'll get a better response elsewhere, don't hesitate to move the post.
Cheers,
ChristiaanJ