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Protron PLTV 30 power supply

Discussion in 'Electronic Repair' started by [email protected], Jul 20, 2007.

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    Yes I am aware that they are not available. Having looked at one
    though I see only two supplies, 12V and 24V. It occurs to me that this
    can not be hard to build.

    I've built a few car amps. I designed a real dandy one with a DC to DC
    convertor, and while I never built the whole thing, I did build the
    convertor. Anyone need 36VDC in a car at 10 amps ?

    It needs 24V @ 6A and 12V @ 3A. This is niot a tall order, and demand
    is there. One is on the eBay want it now list and there is alot of
    bitching going on about this. The fact is Protron never intended to
    make any parts available whatsoever.

    In my view, that created a vacuum, a demand not being met. these
    things are not very old. What did they cost ? What can I build the
    power supply for ? How much money can I make.

    In the case of a 40" or whatever, widescreen HD LCD direct view, I
    don't think it cost less than $1,000. Maybe this one's a 30", but
    still it cost something. What if my power supply was like $200 ?

    Years ago I developed an SCR regulator circuit, never built it but I
    know it'll work. This is the simplest switching regulator possible. I
    won't reveal the circuit right now but I'll tell you the principal on
    which it works.

    TV techs should remember the SCR regulators in TVs years ago. A
    couple, Emersons and Sylvanias would get a condition where the set was
    running but the phase modulated trigger pulses were missing. Sets like
    this that used zener diodes to start the circuit would make a noise,
    and possibly display a picture that was described as a Chistmas tree.
    This was the SCR firing off the zener and turning off as soon as the
    voltage equalized.

    My idea is to tune the load of the circuit so that this happens alot
    more quickly, in the kilohertz range. This would be accomplished with
    some inductance, and limited capacitance loading. Of course it may
    need some tweaking and if I can't get it working in a timely fashion I
    might have to resort to more conventional technology. Either way I
    know I can build the thing.

    I would use switching regulators anyway, whatever configuration, but
    really, I think I would stick with a conventional power transformer
    for the DC.

    This is something I should look into, anyone interested, contact me,
    or post here.

    JURB
     
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