TDA7021 (or KA22429) FM radio kit
Product code: B21Jt
The receiver is a kit, you need to weld and debug by yourself, the kit has a matching shell!Our kit products only provide paper materials, not electronic documents, please forgive me!
Classic single-conversion low-IF FM receiver(TDA7021/ or KA22429)The kit helps to learn and master the working principle of a frequency conversion low-IF FM reception and triode audio power amplification. Refined single panel, including a 9018 antenna amplifier circuit.
The receiver is small in size, with a waist buckle,The overall size is 8X5.5X1.5cm,Powered by 2 AAA batteries, compatible with BP machine type mono(Or stereo)The FM transmitter is matched to form a wireless headset, and the receiving frequency(88-108MHz)Continuously adjustable,The receiving frequency can be adjusted to the FM band by the user(88-108MHz)outside. The bandwidth is about 25MHZ, the machine uses TDA7021 (or KA22429) as the receiving, FM mono, including a 9018 high frequency(antenna)The amplifier circuit and the first-level M28S triode audio amplifier circuit. Matching earplugs. Suitable for students and radio enthusiasts to assemble, with detailed working principle diagrams and installation diagrams.