Wideband FM VHF Receiver

This Wideband VHF FM receiver uses a common TDA7000 IC and will tune between 70MHz and 120MHz. 200mW AF power into a 16ohm speaker is gained using a TBA820 O/P IC. Both inductors L and L1 should be the same using 22SWG. For 70MHz 6 turns on 7mm former quite closely wound, 100MHz 5turns and 115MHz 4turns. The gain of the receiver drops of considerably after 110MHz. Datasheets are available. Look at my Technical Info page. The 90pF Tuning Capacitor is actualy two trimmers in parrallel. The main one being 22pF Variable Capacitor and a 75pF Trimmer.
Forrás: AJP circuits