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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