[sdiy] SMT +3500 tempco?

[Oren Leavitt]

On 9/30/2011 9:45 PM, Tim Parkhurst wrote:
> On Fri, Sep 30, 2011 at 7:18 PM, Paul Perry<pfperry at melbpc.org.au>  wrote:
>> For anyone who wants to roll their own tempco, pure copper has a coefficient
>> of around +3930 ppm.
>>
>> paul perry Melbourne Australia
>>
> So... a piece of copper in series with a ~2K resistor would be just about right?
>
>
> Tim (metal head) Servo

Could be DIYable...
I am thinking something like a film of copper sputtered on to a ceramic 
or glass base in a vacuum chamber. Some form of terminals would be 
attached to the deposited copper film, and some a coating to protect the 
copper from oxidation.

- Oren (resistors are futile)