> Thanks Dieter
> If i have to change those resistors (The three feedback resistors
> R4, R9 and R13 that i have to changed from 47k to 91k)
> Which are the most recommended resistors that I can buy in small
> quantities and where if possible
> Thanks again
>
> Ric

As already said you need a 91k resistor (of course with the same dimensions
as the 47k, i.e. "0207" type). From your message I cannot see you home
country. I only know German electronic shops.

Best wishes
Dieter Doepfer