In article , alan_m
wrote:
On 06/03/2020 08:33, Brian Gaff (Sofa 2) wrote:
That sounds awfully crude to me, I'd have suspected something like a
drill speed control circuit. Brian


It probably depends on the age of the machine. The clue is in the
original post - the machine is 40 years old.

we did have transistors then.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle