01-05-2021, 04:28 PM
I have never built a valve flip flop. It always seemed a bit of a waste as transistor circuits are so easy and cheap but maybe worthwhile for a change. At one time I had some of those cards from an old electronic learning kit which had transistor flip flops but sadly I think they have gone. A valve version would be different and I have a good number of cheap subminiature pentodes. Still perhaps really a waste.
My only point about the resistors is - If they are critical how long would the circuit work for with the vaguaries of resistors in those days. I wonder if it is just that they were those found to work, and their actual values were measured, rather than defining values in a range as today. More of a laboratory experiment with elaboration of working conditions.
It does look early except that the batteries spoil it a bit. Personally I would have put the batteries elsewhere. Maybe underneath. I suspect many here could improve on that. I wouldn't claim to be able to do any better though, and it is inspiring. Duracell are losing it on not picking up on advertising potential lol
Tracy
My only point about the resistors is - If they are critical how long would the circuit work for with the vaguaries of resistors in those days. I wonder if it is just that they were those found to work, and their actual values were measured, rather than defining values in a range as today. More of a laboratory experiment with elaboration of working conditions.
It does look early except that the batteries spoil it a bit. Personally I would have put the batteries elsewhere. Maybe underneath. I suspect many here could improve on that. I wouldn't claim to be able to do any better though, and it is inspiring. Duracell are losing it on not picking up on advertising potential lol
Tracy
