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  1. debar

    Filament supply transformer for magnetron

    I am looking for help finding a source to purchase filament supply transformers for magnetrons. We have been using an Advance Transformer (8080F11-90) part for many years but the supplier (AMI) ran out and cannot purchase more. It is for running hot filament in run-of-the-mill 1kW mag tubes...
  2. debar

    Generator manufacturers

    I am looking for some manufacturers of electrical generators in the 50kW to 100kW range - just the generator, not the prime mover. The only one that I have found is Marathon Electric, but there must be others. It doesn't matter what type at this point (induction, synchronous, voltage output...
  3. debar

    Potting Compound

    For large potted assemblies, I like 50-3150FR from www.epoxies.com Search for it under 'technical bulletins'. It runs about $60 or so a gallon.
  4. debar

    10kW PFC front end

    Thanks for the responses. I agree with the single phase limitation but I don't want to get hung up on that. Assume three phase. Picture 10 machines running in an industrial setting. Each requires 1kW. Since each draws less than 16 Amps, they must comply with EN61000-3-2 if powered from...
  5. debar

    10kW PFC front end

    I am looking for some help in locating a power factor corrected front end. It must have a CE label as it would be going directly to EU countries. Here are the specs: -input: 220Vac (could be single or three phase) -output: 350Vdc to 400Vdc (most likly non-isolated) -power output of 10kW (I...
  6. debar

    Off-center coaxial waveguide

    The waveguide is a coaxial structure with outer and inner conductor and the dielectric happens to be teflon. If the inner conductor is centered the impedance of the line is (138/sqrt(Er)) * log(D/d), where Er is dielectric constant, D is diameter of outer conductor and d is diameter is inner...
  7. debar

    Off-center coaxial waveguide

    I am looking to characterize a coaxial waveguide in which the inner conductor is off-center. Is it still TEM mode? How do I calculate impedance and wavelength?

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