> Yes - it has base-pins just like a vacuum tube.
> The metal cap is on the top of the recifier metal case.
> Unit is about 3.5 inch tall.
>
> I would think my two replace a HV tube since it rectified for 2 x 813's.
>
> I did contact Semtech, the reply said nothing of help.
>
> Have not had the chance to check any wiring and have no schematic.
>
> //Well, obviously a silicon rectifier has no filament or heater but
> otherwise wires in the same way as a tube would. The metal cap would be
> the anode, and base pin(s) would be the cathode. Since most of these HV
> rectifier replacements use multiple diode junctions in series (and
> possibly quite a few of them), you probably cannot use an Ohmmeter to
> check it out for anything other than a short circuit. It should look like
> an open circuit, probably, in both directions (unlike a single-junction
> diode, which will have much lower resistance in one direction when checked
> with a conventional low-voltage Ohmmeter). -WB2WIK/6
>
> Regards,
> Steve
> WA2TAK
>
>
>
> Steve Katz <stevek@jmr.com> wrote:
>
> >
> >
> >> Hi all:
> >>
> >> Got my 813 parts rig.
> >> The PS has two " Semtech SA 7477 " rectifiers.
> >> Black metal tube with pix of diode on it...top metal cap.
> >>
> >> Might anyone have data on it?
> >>
> >> //"SA" means "special assembly," and it's an arbitrary number issued in
> >> sequence; so, SA7477 is #7477 in a long line of special assemblies.
> There
> >> is no published data for special assemblies, since they are
> manufactured
> >> to order for OEMs.
> >>
> >> How to check them?
> >>
> >> Should I use them ...or replace with something else?
> >>
> >> //Based on your description, sounds like a rectifier tube replacement.
> >> Does it have a tube base (pins) on one end, and an anode cap on the
> other?
> >> If so, it's a tube replacement. Normally these silicon rectifier
> >> replacements don't go bad (or at least not with "age"), so unless there
> >> was a fault down line (like a short circuit), they're probably okay.
> >> -WB2WIK/6
> >>
> >> Tnx,
> >> Steve
> >> WA2TAK
> >> _______________________________________________
> >> Amps mailing list
> >> Amps@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/amps
> >
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