[Amps] HV rectifier diodes

[Michael Clarson]

Before ordering from Mouser or DidiKey, check Jameco. They were lowest
price when I needed diodes. --Mike, WV2ZOW

On Mon, Jan 28, 2019 at 10:04 AM Boye Christensen <oz7c at cool.dk> wrote:

> Hi
>
> I did replace in my SB220 think it was in before 2000
>
> 1 Amp diodes 1N4007 with 3 Amp diodes 1N5408 1/2 $ a pice
>
> They are still working !
>
> 73 Boye OZ7C
>
>
> On 26/01/2019 20:38, Art wrote:
> > Hi All,
> >
> > When I joined the list, it was to get the skinny on solid state amps,
> > little did I realize that my tube type amp would die and I'd be
> > consulting the list for HV diode suggestions and vendors.
> >
> > But:
> >
> > I have a bottom end amp, 400 watts out, an AL84. The plate voltage
> > dropped from just under 1kV (unloaded) to 600v and obviously the power
> > output is way down. I assume I need new rectifiers.
> >
> > The manual says it uses 1kV @ 3 amp diodes, 8 of them total, in a full
> > wave bridge rectifier configuration. The part number is AR-145, which
> > isn't available, it's likely an Ameritron house number. The voltage
> > rating of each diode seems marginal to me though (to me).
> >
> > I looked in Digikey and Mouser, they don't don't carry them.
> >
> > There are no equalizing caps or resistors, so I'd prefer to put in a
> > single 4kV diode rather than deal with 2 diodes in each leg of the
> > bridge. Barring that, I'd like to replace all 8 diodes with 2kV @ 2 amp
> > diodes.
> >
> > Are there any reputable vendors that sell these lower voltage diodes at
> > a reasonable price, I would prefer NOT to use the online auction site::>
> >
> > Would appreciate any comments or suggestions.
> >
> > TY
> >
> > Art
> >
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