mstechca
New Member
I have just about completed my homemade FM radio, and it incorporates an amplifier similar to that shown below:
**broken link removed**
If you don't see a picture, go to: **broken link removed**
Anyways, the only problem left is the maximum volume. When it is low, there is practically no distortion. HOWEVER, as soon as I connected a 5nF capacitor between tr1's base and emitter, the volume has doubled. Once I added a 2.7nF capacitor between the base and collector of Tr3, the volume has increased another 50%, but now I am hearing unwanted oscillation.
Changing the stations seems to have no effect. Is there a way I can obtain lots of volume without all the distortion? do I need to lower my input current or voltage?
**broken link removed**
If you don't see a picture, go to: **broken link removed**
Anyways, the only problem left is the maximum volume. When it is low, there is practically no distortion. HOWEVER, as soon as I connected a 5nF capacitor between tr1's base and emitter, the volume has doubled. Once I added a 2.7nF capacitor between the base and collector of Tr3, the volume has increased another 50%, but now I am hearing unwanted oscillation.
Changing the stations seems to have no effect. Is there a way I can obtain lots of volume without all the distortion? do I need to lower my input current or voltage?