Re: fly back diodes

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Daniel Barrett by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dbarrett1-at-austin.rr-dot-com>

    Hi Jimmy-
    Reverse recovery time is definitely a problem if you are using 'standard
recovery' rectifiers such as the 1N4007. I have gone through about 400 of
these learning that with my MOT supply ;)
You might want to try a 'fast efficient' diode such as the UF4007. These are
a bit more pricey at $.19 each (Mouser) but they have a 75nS recovery time.
db


Subject: fly back diodes


> Original poster: "jimmy hynes by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<chunkyboy86-at-yahoo-dot-com>
>
>
> i recently finished my first tesla coil, it has a 2x12" secondary and will
only
> make 3 inch arcs. i finally figured out what is wrong with it. i am using
a
> rectified solid state neon transformer. i think the reverse recovery time
is
> whats killing me here. i also have a pile of dead flybacks. instead of
digging
> for the hv diodes, could i just hook up the flyback secondarys to the
> transformer. if the secondary is shorted then the inductance should be
really
> low and i think the resistance wouldnt be too bad at 20ma. i think i would
just
> have to worry about putting too much current through them. how long could
i
> keep the runs without melting the diodes? is there any other problem with
this?
>