Pocket Radio AM / FM circuit

Earphones, batteries are sold separately. AM / FM seems to be a common mold. But stamping is different. AM / FM E193577 UL94V0 board with the AM / FM etching printed circuit board manufacturers are the same. Shape is considered to be shared. Radio FM transistor S9014, IC LA1800 is used. 100 AM, FM Radio and 2W IC Amp substrate incorporated into the case. Variable capacitor is used for the junk FM · AM variable condenser 2. FM section, and turned the proximity variable capacitor, AM has a distance as a measure of the local oscillator wrap, leads unavoidably variable capacitor, Sorudatoru (desoldering wire), and with the shield. Radio low-frequency portion, FM ANT has converted part of the circuit. Radio is the height of perfection impressed. Model No. DD2000-A DD2001-F Receive Frequency 530kHz ~ 1605kHz 76MHz ~ 108MHz Output terminal M3.5 100? mono earphone M3.5 64? mono earphone Power Two AAA batteries batteries DC3V Battery duration 70 hours (using AAA manganese batteries) About 60 hours (using AAA manganese batteries) Maximum Dimensions About 57X91X24mm (width X height X depth) Mass Approximately 80g (battery included earphones) Approximately 65g (battery included earphones) Accessories Instruction Manual

The described device is a portable AM/FM radio receiver designed to operate using two AAA batteries, providing a compact and lightweight solution for audio reception. The model variants include DD2000-A and DD2001-F, each supporting different frequency ranges: the former covers AM frequencies from 530 kHz to 1605 kHz, while the latter covers FM frequencies from 76 MHz to 108 MHz.

The radio employs a printed circuit board (PCB) identified as E193577, conforming to UL94V0 flame retardancy standards, indicating a robust design suitable for consumer electronics. The PCB integrates key components including the S9014 transistor, which is utilized for low-frequency amplification, and the LA1800 integrated circuit (IC), which manages radio frequency processing and audio output. The output is directed to a 3.5 mm mono earphone jack, with impedance ratings of 100 ohms for the DD2000-A model and 64 ohms for the DD2001-F model.

The device features a variable capacitor for tuning, allowing users to adjust the reception frequency. This capacitor is crucial for both AM and FM sections, enabling fine-tuning of the local oscillator for optimal signal reception. The design incorporates a proximity variable capacitor for the FM section, enhancing the ability to capture distant signals.

The overall dimensions of the device are approximately 57 mm in width, 91 mm in height, and 24 mm in depth, with a total mass of around 80 grams for the DD2000-A and 65 grams for the DD2001-F, including the earphones. Battery life is rated at approximately 70 hours for the DD2000-A and 60 hours for the DD2001-F when using AAA manganese batteries, reflecting efficient power management within the circuit design.

Included with the device is an instruction manual, providing users with operational guidance. The design emphasizes usability and portability, making it suitable for a variety of applications, from casual listening to outdoor activities.Earphones, batteries are sold separately. AM / FM seems to be a common mold. But stamping is different. AM / FM E193577 UL94V0 board with the AM / FM etching printed circuit board manufacturers are the same. Shape is considered to be shared. (Design, sharing the production process design?). Radio FM transistor S9014, IC LA1800 is used. 100 AM, FM Radio and 2W IC Amp substrate incorporated into the case. Variable capacitor is used for the junk FM · AM variable condenser 2. FM section, and turned the proximity variable capacitor, AM has a distance as a measure of the local oscillator wrap, leads unavoidably variable capacitor, Sorudatoru (desoldering wire), and with the shield.

Radio low-frequency portion, FM ANT has converted part of the circuit. Radio is the height of perfection impressed.?? Model No. DD2000-A DD2001-F Receive Frequency 530kHz ~ 1605kHz 76MHz ~ 108MHz Output terminal M3.5 100? mono earphone M3.5 64? mono earphone Power Two AAA batteries batteries DC3V Battery duration 70 hours (using AAA manganese batteries) About 60 hours (using AAA manganese batteries) Maximum Dimensions About 57X91X24mm (width X height X depth) Mass Approximately 80g (battery included earphones) Approximately 65g (battery included earphones) Accessories Instruction Manual 🔗 External reference