[sdiy] Re: PT146 +3500ppm 1K positive tempco resistors (fwd)

[Ian Fritz]

Scott --

Interesting. As I mentioned, I was unable to get a quote from Arleen and 
gave up after three tries.  The problem may be that I asked for 
non-inductively wound units.  You might want to check on this aspect 
carefully, as people have reported circuit instabilities using inductively 
wound ones.

In the meantime, I contacted KRL today, placed an  RFQ, got the quote and 
placed the order, all in the space of a couple of hours.  The price I got 
is $6.57 each for 12 units. The part number I bought, if anyone is 
interested, is 540 C Q 2001 F. This is a .35 W axial package, 2 kOhm, 1%, 
3500 ppm/K.  For 1 kOhm just use 1001 instead of 2001.  The only downside 
is that there is a 3-4 week lead time.  The price you pay for getting 
exactly what you want, I guess.

Interesting factoid: KRL is in Manchester, NH, the same city where Tel Labs 
was.  Are they "related"?

   Ian



At 04:17 PM 3/10/2003, sbernardi at attbi.com wrote:
>Here's the quote I received from www.precisionresistor.com: $7.00 each in
>quantities of 10.
>Still pretty steep.
>----------------------  Forwarded Message:  ---------------------
>From:    "Arleen Reid" <prc at precisionresistor.com>
>To:      "Scott Bernardi" <sbernardi at attbi.com>
>Subject: Re: PT146 +3500ppm 1K positive tempco resistors
>Date:    Mon, 10 Mar 2003 14:34:36 -0500
>
>We are pleased to quote as follows:
>PT146 1K ohm 1%
>         @25 C
>          TC 3500 ppm/degree C
>10 pcs.@$7.00 ea.
>Lead time: stock
>We accept Visa and Master Card
>or we can ship COD.
>
>Regards,
>Arleen/Sls Mgr.
>----- Original Message -----
>From: "Scott Bernardi" <sbernardi at attbi.com>
>To: <prc at precisionresistor.com>
>Sent: Sunday, March 09, 2003 8:35 PM
>Subject: PT146 +3500ppm 1K positive tempco resistors
>
>
> > Hi, I'm a hobbiest building analog style electronic muic synthesizers.
> > There are a number of us that are part of the synth-DIY mail list, and
> > one hard to get part is a positive temperature coefficient resistor we
> > use to compensate for the temperature drift in bipolar transistor based
> > exponential current sources (used for VCO's, VCF's, etc). Your PT146
> > +3500ppm/deg C axial 1K resistor fits the bill very nicely.
> > Do you sell in small quantities (say 10 or so), and what is your
> > pricing?
> >
> > Thanks.
> >
> >
> >