Rich, you must have missed my earlier post. I tried tracking down the
Dale resistors by calling every Vishay/Dale distributor listed by
Vishay. Those high voltage resistors (which fit the bill perfectly)
are not carried by any stocking distributors, partly because they are
NCNR (non-cancellable non-returnable). They are about $17 each, must
be ordered from the factory and the factory does not quote a lead time.
We checked the inventory directly at Vishay/Dale and there are no
3.5kv, 7.5 kv, or 15 kv resistors in stock at Vishay. So if you order
a couple of them you will have to wait until someone orders lots of
them and piggyback on their production run.
I don't know which ones you are referring to from Mouser - none of the
ones I find fit your description. In fact, I haven't found any 1400
volt units available from Mouser.
They carry Ohmite 10% ceramic comp units that go up to 1 Megohm, 2
watts, rated at 700 volts - but they are $1.08 in onesy twosy and $.87
over 100. For my application I would need about 500 of these.
They also carry Xicon metal oxide units that go up to 1 Meg at 1,2, or
3 watts but are only rated at 350 volts. The 1 watt units are $.13 in
onesy twosy and $.09 between 100 and 1000 pieces. I would need 500 of
these too.
They also carry Xicon carbon comp resistors that go up to 8.2 megohm.
But I researched these on the Xicon site and find that they are rated
at 500 v. These would work for me, I would need 61 of these at $.30
each, which would be $18 bucks.
Then Mouser also carries what seems to be the best units for my
application: the Xicon 5% carbon film resistors. These are available
up to 22 meg. I will use 33 15 meg units at a total cost of $2.97.
(I'm conveniently ignoring insertion cost).
Let me know if I've missed any 1kv units - I don't see any.
Thanks,
Michael
--- Richard <2@mail.vcnet.com> wrote:
>
>
> >> I guess I'll go with a string of 500 volt 5% units at 5 cents each
> and
> >> put in a pot at the bottom of the string to dial it in.
> >>
> >
> >I'd just order some new 50 cent HV rated resistors and place them in
>
> >series.
> >
> [] Good advice. Mouser has 1M-ohm, 2W resistors that will
> apparently
> handle 1400WV and they are c. 30-cents each.
> Also, Vishay/Dale at
> http://www.vishay.com/products/resistors/main.html#fl
> has individual resistors that will handle 15kV with ease in values up
> to
> 1G-ohm. A list of distributors is furnished.
>
> >...
>
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
> end
>
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