We found this transistor siren in an old English publication. The transistors are from the era, but current equivalents can be used. Frequency can be changed by changing components.
Siren (CB22172E)
- Details
- Written by: Newton C. Braga
We found this transistor siren in an old English publication. The transistors are from the era, but current equivalents can be used. Frequency can be changed by changing components.
