[Amps] hv resistors

[WYsixK]

I contacted them and they say they don't sell any high voltage
resistors anymore.  I wasn't particularly impressed by the knowledge of
the person I spoke to though.  If anyone knows a name of someone known
to be knowledgable at Hosfelt, give me their name and I'll try again.


--- PAUL HEWITT <wd7s@att.net> wrote:
> Hosfelt Electronics did sell a 100meg
> 15kv resistor (< $3), not sure if they
> still do.
> Paul
> 
> PAUL HEWITT
> WD7S PRODUCTIONS
> QRO HOMEBREW COMPONENTS
> http://wd7s.home.att.net
> 
> 
> >
> > I too have spent a
> > frustrating afternoon
> > searching for high voltage
> > resistors.  I need some 15kv
> > resistor strings for a high
> > pot tester.
> >
> > I contacted Vishay/Dale and
> > all of their authorized
> > distributors and
> > here is what I learned.
> >
> > The BAEW, BAKW, BBF, BBFW,
> > BBM, BBMW, BBR, and BBRW
> > model carbon film
> > resistors seem to be the most
> > nearly appropriate.  They run
> > from 2.5kv
> > to 15kv.  They even make some
> > that go to 40kv (BFW model).  However,
> > they are not stocked by
> > either Vishay or any of their
> > distributors.
> > They are non-returnable
> > non-cancellable (NCNR in
> > their lingo) items and
> > each of the distributors gave
> > me a brief lecture on the
> > perils of that
> > disease and testified that
> > they would never stock such
> > things.  Worse
> > yet, the factory does not
> > quote a lead time for them.
> >
> > The BBR models are 15kv and
> > are about $17 each for 15% tolerance
> > The BBM models are 7.5 kv and
> > are about $16.50 each for 15%
> > tolerance
> >
> > The 15% tolerance means these
> > are not terribly well suited
> > to metering
> > anyway - there will have to
> > be a trimmer in the circuit
> > and the divider
> > string will have to be
> > manually calibrated.
> >
> > There is a minimum order
> > requirement (from the
> > factory) of $50, which
> > isn't bad at all actually.
> > However, the lack of a lead time quote
> > means that the lead time is
> > indeterminate - probably until someone
> > makes a large order on which
> > our small order could
> > piggyback.  Which
> > could be years.
> >
> > I've given up and will make a
> > string out of thirty 500
> > volt, 5% units
> > that are readily available
> > from Mouser for 5 cents each.
> >  They are 5
> > cents each if you get 100 of
> > them, which I will.  They are 14 cents
> > each if you only get 10 of them.
> >
> > Michael
> 


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