SOWTER VINTAGE AUDIO TRANSFORMERS circuit

The time constant of R1C1 determines the low cutoff frequency, while the time constant of R2C2 determines the high cutoff frequency. The pass-band gain, Avpass = R2/R1. For a high-pass filter, Za must be capacitors and Zb resistors. By substituting...

power supply am farm radio

The ability accumulation is a Tamura 3FD-410 5V bifold primary/dual accessory transformer, available from DigiKey.com at reasonable prices. The transformer's primary windings can be configured in series for 240VAC operation or in parallel for 120VAC operation. This configuration utilizes one...

Hi-fi amplifier 80Wx2

The 2SC2987 and 2SA1227 transistors are used in the uPC1342V circuit, which is a two-channel high-power amplifier capable of delivering 80W using two tubes in the discharge circuit. This circuit incorporates a multifunction protection feature similar to the PC1237 circuit....

Updated 60-100W Hi-Fi Power Amplifier

The foundation of this amplifier is detailed in Project 03, which does not claim to be cutting-edge; the base design is over 20 years old. It is straightforward to assemble, utilizes readily available components, and is stable and dependable. The...

Dodd Station

Dodd's 1909 receiver has survived and was discovered among various parts purchased at a yard sale. The components were identified from a photograph of the 1909 Station. Many of these parts were utilized in the construction of Dodd's 1912 station,...

1945 RCA CRV-59AAE Iconoscope Camera

The CRV-59AAE measures 20 inches in length, 9 inches in width, and 10 inches in height, with a weight of 33 pounds. This device is over 60 years old and is in excellent condition, showcasing advanced miniaturized technology for its...

50W Hi-Fi amplifier with TDA7294

The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range start at 16Hz and can reach 100KHz. Make sure you are...

Talema 10VA transformer board

All DAC boards include a power supply section. It is sufficient to connect only a power transformer. This board is designed for a toroidal 10VA transformer manufactured by Talema, which features pins for PCB connection and exhibits minimal electromagnetic field...

Car battery charging circuit diagram

The circuit operates on the principle of a transformer, bridge rectifier, and conditioning for battery charging. The charging current can be adjusted to approximately 12V at 100A. For battery charging, a charging rate of 10 hours requires a charging current...