On 10/03/2019 18:31, N_Cook wrote:
On 10/03/2019 16:06, N_Cook wrote:
RIFAR540
RD6416 N
Could be 1 instead of I , and N probably refers to the plastic
encapsulation. 14 pin IC in the power supply section of some 1979 kit.

Until I can power-up probe/explore trackside, my guess is perhaps , from
the "16", a variant of CMOS quad analogue sw.


pins 1,3,5 and 13 seem of the same type or function, inputs or outputs
or control lines from another board, so could be quad an. sw.
A stepped range of supply volts or amps would make some sense for a
step-wise variable drive.