Another foreign school kid without a teacher.
BONJOUR!
The TDA7000 "radio" IC and the BC109 transistor are obsolete and are not made anymore.
The TDA7000 had horrible performance. I used BC109 transistors in my first job 45 years ago.
The hFE of an old BC109 is not 300, it is a range from 200 to 800. Yours might be 300.
Its Vbe is not 0.7V, with a collector current as low as 0.5mA then its Vbe is about 0.6V.
I did the simple calculations for you.
BONJOUR!
The TDA7000 "radio" IC and the BC109 transistor are obsolete and are not made anymore.
The TDA7000 had horrible performance. I used BC109 transistors in my first job 45 years ago.
The hFE of an old BC109 is not 300, it is a range from 200 to 800. Yours might be 300.
Its Vbe is not 0.7V, with a collector current as low as 0.5mA then its Vbe is about 0.6V.
I did the simple calculations for you.