BUZZER No. 20
Buzzer for general purpose use.
Older version is shown above (Marks 1, 2 & 3), constructed of wood and steel, whilst the later, Mark 4 version, is made of plastic.
Working voltage is 10 - 50v DC.
Fitted with R.F. suppression.
Buzzer No. 20A - Consists of two 1,000 ohm coils that can connected in
parallel or series.
Drawing - 62799.
Specification - S594.
Last revised: February 28, 2023