Values of ppm/°C of 2 resistors in parallel

[Cap_search]

First of all Happier New Year to all,

Dear all, I hope I'm posting this in the right forum.

Ok, I'd like to know the final ppm/°C of 2 identical resistors in parallel.

Given two same resistors in parallel of, say, 1Ω (1W), both rated 300ppm/°C,
I know their resistance will be 0.5Ω (2W), but will their combined tempco
value also be halved to 150ppm/°C ?
Or their tempco will be increased to 600ppm/°C ??

Thank you, any hint would be greatly appreciated!

[eccerr0r]

Re: Values of ppm/°C of 2 resistors in parallel

On the first order, it would be unchanged.

On the second order, it depends on how you're using them, as resistors generate heat.

[Cap_search]

Re: Values of ppm/°C of 2 resistors in parallel

On the first order, it would be unchanged.

On the second order, it depends on how you're using them, as resistors generate heat.

Hmm, so the tempco remains unchanged. Ok, thanks eccerr0r!

These are for emitter sensing resistors in a power amplifier (output stage).
I'm asking because the value required is about 0.5Ω, but I have only 1Ω ones.

And I thought because they were sharing same duty in parallel, then they could
be/perform more stable through most loads or powers.

Probably tempco is not critical in this application area.
Thanks again! Much appreciated!