User manual

D1 varactor diode 1SV101
R1 4.7 kO (yellow, violet, red)
R2 220 kO (red, red, yellow)
R3 1 kO (brown, black, red)
R5 330 kO (orange, orange, yellow)
R6 33 O (orange, orange, black)
C15 Elko 100 µF
C17 100 nF ceramic (104)
5
With the highly integrated receiver IC TDA7088, construction of a dedicated VHF
radio has become so simple that anyone is able to successfully solder together
this radio. The single-ended low frequency amplifier works similar to the historic
tube radio template. Your nostalgic radio uses a two-level transistor amplifier
with medium volume at low battery voltage. Now, two 1.5 V alkaline batteries are
sufficient for up to 100 hours of radio reception. Your self-made radio will make
listening to the radio even more fun. Enjoy the diversity of the VHF stations.
Components
Pre-equipped PCB with TDA7088
rod aerial
speakers 8 O, 0.5 W
volume control 22 kO with switch
tuning control 22 kO
insulated wire
battery compartment with connection wires
T1 PNP transistor BC557B
T2 NPN transistor BC547B