45W Amplifier (T497E)

This Public Address amplifier was found in a 1947 amplifier manual. The power supply uses two transformers with two rectifier tubes.

| Clique na imagem para ampliar |

High Fidelity Preamplifier (CB13215E)
This circuit is from old Motorola documentation, from the 70s. The integrated circuit is difficult to...
Pre-Emphasis on 1500 Hz (CB13685E)
This circuit reinforces signals in a frequency range between 1500 and 2000 Hz for use in...
Current Meter (CB5133E)
This circuit was obtained from a manual of the integrated circuit itself, but can be applied to...