TREE

This simple circuit FM radio receiver comprises a step of regenerating rf, TR1, followed by a two-stage three audio amplifiers, TR2 to TR4. A critical part of the FM radio receiver is the first stage, TR1/VC1 where the wiring should be kept as short as possible. Coil L1 consists of 8 turns of the winding 1 mm (20 AWG) enamelled copper wire 6 mm in diameter L1 should then be thoroughly and uniformly stretched to a length of about 13mm. Read more Small Circuit Multiband Radio  FM Radio Receiver Circuit Diagram The tuning capacitor VC1 is one of two sections of a fm radio FM miniature, it is connected to the capacitor C1 22pF. The inductance value L2 rf is not critical, since anything 1μH to 10μH. The output is suitable for common headphones connected in series to provide an impedance of 64Ω. List of Transistors TR1 = BF199 TR2 TR3 TR4 == = BC547

The project is a user-friendly and cheap FM radio receiver which produces the desired audio signals using integrated circuit to achieve the pre-processing units. During operation, the user is allowed to change stations and interact with the receiver by integrating a keypad and an LCD for communication. There are several functions that this radio receiver can perform including adjusting the threshold when picking up stronger or weaker stations, setting up 3 favorite stations for quick tuning, scanning up/down for next strong signal station, and tuning up/down a frequency. A keypad is designed for controlling the receiver and the buttons are mapped to their corresponding functionality while the other buttons are not connected. The 4 main sub-components of the receiver include the LCD, the keypad, the favorite station storage, and the communication with receiver. Each of them is being controlled by their software components. The antenna transfers the incoming radio signal to the AR1010 F...

AM Transmitter circuit  To this powerful AM transmitters are huge, using ceramic tuning 3.587 mhz resonator and resonator filters are also sold with a value of 5.5 mhz, 7.7 mhz and 10.7 mhz. Distance transmitter range is approximately 2-4 km. the working principle of this circuit are filter resonator/ceramic filters raise the frequency of the value of the resonator filter. This frequency is amplified by the transistor can be changed t1. Frequency so need C7 as a regulator / placement. sound signal superimposed over the audio transformer.frekuensi which awakened by resonator filters and t1 is fed to the next amplify strengthened so as to achieve the desired power passed to antenna. t2 and t3 as a buffer as a final power amp. AM Transmitter Schematics AM radio / receiver circuit For AM radio because it's hard to find IC ZN 414 then now could be replaced with the equivalent of IC MK 484. Frequency coverage between 550 kHz-1600 mhz...

This is an AM radio power amplifier circuit. What is different with other general amplifier is that this circuit has a low-pass filter (passive type), built using R1C1 to limit the input-output frequency response. Additionally, a ferroxcube K5-001-001/3B with 3 turns of wire is used as ferrite bead  at output filter. All components should be spaced very close to  the IC.  The ground and speaker lead must be twisted tightly. The supply lead and supply ground also must be twisted very tightly. Here is the schematic diagram of the  circuit.  Audio Power Amplifier for AM Radio Circuit Diagram

1960 Model Transformer-less [Barterer Type] Radio - RCA Victor - Schematic Circuit Diagram