Hi Jan,
yes it is normal - the LED software seems to be smaller than the rest.
A bcd switch is something like the switch in the yoke of the B737 right hand side - you can "dial" differnt numbers - as far as i know it is not used in the B737 - except in the yoke .... maybe for the xpdr...
You cannot connect the Conrad rotarys directly - you need the REDEC interface.
The KNITTER switches can be used without interface though.
Mathias
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