Tempco resistors

Rene Schmitz uzs159 at uni-bonn.de
Fri Dec 12 16:36:39 CET 1997

At 00:28 11.12.1997 -0600, you wrote:
>I have discovered a source of tempco resistors, Micro Ohm Corporation, at
>http://www.micro-ohm.com/temperature/temprecflm.html.  The cost per unit is
almost $20; are these indeed the >resistors that circuits such as Gene
Stopp's AMS1 circuit boards require?  The minimum order is 3 resistors; >it
seems to me I remember somebody posting here that they ordered thirty of the
components from KRL for $100. 

I had a similar dilemma. I didn't want to spend my time and money on long
distance phone calls/web surfing to find a source of costly tempco resistors.
Maybe you should go another route, it requires little more soldering, but is
definately cheeper than 3$.
I mean you could try my "temperature compensation amplifier". Its tempco is
exactly +3300ppm/C.
You could set it on a little perforated board, and replace the
resistor/tempco divider with it.
(For fitting into existing VCOs one could tweak the circuit a little, I
would assist on that if nothing helps!)
Try my Homepage at http://www.uni-bonn.de/~uzs159/vco.html
I think its worth a try, you could use a tempco later in case you are not

>Can anybody point me in the right direction re getting these tempco
resistors (1K  +330ppm/C') at a reasonable
of course you mean 3300?    ^^^^^^^^ 

>price?  Gene has convinced me that the circuit will work better with these
components; however I'm having a >devil of a time locating the parts.  I
actually wouldn't balk at the $60 for 3 of them, if , for sure, these >are
the parts I need.  The disparity of price concerns me though; why would KRL
sell the same thing for 3 >bucks that Micro-Ohm wants $20 for?  And if they
are the same price, anybody out there want to co-op and buy a >batch from
KRL, and split the expense?  That would be a real money-saver....
>I hope this isn't a really dumb question, but I could really use some
There are no dumb questions, just dumb answers. Hope this one isn't...

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