December 2017
M T W T F S S
« Nov    
 123
45678910
11121314151617
18192021222324
25262728293031

Archives

The Microbit Foundation

Camara Education

Yobibit

Pimoroni Shop

Slua on Flickr

IMAG0222
IMAG0221
IMAG0220
IMAG0219
Free counters!

Anyone for a wafer?

Sony 3300 Crossover Rotary Wafer Switches

Locating replacements for these switches has turned into a nightmare. The wafers are in excellent condition and contacts have seen very little use. The switch is easily disassembled leaving the wafers in the desired switched state but then then they cease to be functioning switches. The only problem is that the shaft has been sheared off on both switches. The knobs are also missing.

Both switches were manufactured by ALPS in Japan. ALPS is still very much in business but their back catalogue does not seem to extend to the 1960s. I may have to purchase modern equivalents and rewire them with the existing resistors OR hopefully with more compact components.

The rotary wafer switches in question are as follows:

Alps  8D 513-3 109-11 and the Alps  8D 513-3 10-11

Leave a Reply