Rongge

This portable AM and FM radio circuit is designed using the LA1800 IC and some other external components. As you can see in this circuit diagram the LA1800 manufactured by Sanyo Semiconductors , require few additional components. The LA1800 am FM portable radio circuit needs to be powered from a 3 volt DC power supply circuit. AM and FM Radio with LA1800 Portable Circuit Diagram You can use an 3 volt battery. This radio receiver circuit has a low current dissipation of 5.6mA for FM band and 3.2mA for AM band .Also the output signal is driven into earphone speakers , but you can use an additional speaker ( in that case you need to connect an additional small power audio amplifier).

Active AM Radio Antenna Amplifier / Preamplifier Circuit The antenna amplifier circuit has a part count of about 40, using the following active parts: 2 NPN transistors (BC548's), 1 MOSFET (BF981), 2 Varicap diodes (KV1235), as well as a 6v2 zener-diode. there is and a 330uH (micro Henry) inductor / coil, which can be modified for operation on other frequency bands. Designed to work with a telescopic whip antenna, the amplifier circuit operates in the typical AM / MediumWave band of 550 - 1650 kHz (kilohertz), with a power requirement of 12 Volts DC. The circuit also has a gain control feature, so weather signals can be amplifier more, if need be. This amplification alteration is provided via, RV1 The amplifier circuit's output impedance is 50 Ohms, which is the standard for all of radio receivers, so it ought to work well along with your AM receiver. Notes This circuit is designed to amplify the input from a telescopic whip antenna. The preamplifier is designed to cover t...

Voltage V - / 01: 120/230 Frequency - / 01: 50/60 Hz Battery -: 9 V - R14 / UM-2 / C size x 6 Power consumption: 12 W Dimensions (H x W x D): 360 x 225 x 152mm Weight 3.3Kg Tuning Ratio: 87.5 - 108 MHz IF frequency: 10.7 MHz p 0.2 MHz DISASSEMBLY (Click on the pictures to magnify) A. REMOVE THE REAR CABINET  Remove the 3 A1 screws (3x10)  Remove the 5 screws A2 (3x30)  Remove the Rear Cabinet. B. REMOVE THE HAND STRAP  Press the cover down and Pull the handle.  Remove the hand strap. C. REMOVE THE TOP CABINET - Remove the 2 C3 screws (3x20) - Remove the screw C4 (3X10) - Remove the Upper Cabinet. D. REMOVE DECK MECHANISM - Remove the 4 screws D5 (3x10) - Remove the 4 C6 screws (2.5x10) Circuit diagram (Schematic)

Vacuum tubes used: ECH42 – EAF42 – EBC41 – EL42 – EM34 – AZ41 My age was 1-year; when this set was released by Philips in 1951.  Now I'm 67. Circuit Diagram

Here is simple Electronic Circuit Project of two transistor AM radio receiver circuit. This two transistor AM radio circuit is also called “mini-radio”. It uses only 2 transistors and few passive components which makes is very easy to be constructed. Although the circuit is very simple, it functions very well without external antenna or ground connection. The transistor T1 works as a feedback regulated HF-amplifier and function as demodulator at the same time. The sensitivity of the receiver is dependent on the amount of feedback and can be adjusted by P1. Two Transistor AM Radio Receiver Circuit Diagram: The demodulated signal comes out from the collector of T1. The signal is then filtered by C3 so that only the audio signal will be amplified by T2. The amplified signal is then delivered to a high impedance “earphone”. The coil is 65 turns AM antenna wire around a 10 cm long x 10 mm diameter ferrite rod. The tap is at the fifth turn of the coil counting from its ground end. The coil ...

Descriptipn : The following circuit shows about SDR Soundcard Tester Radio Aplication Circuit Diagram. Features:anti-aliasing filter, equipped with an input anti-aliasing filter. Component: Capacitor, Battery, IC, Switch, Resistor.[projectcircuit4u.blogspot.com]