[sdiy] Now tube type (6SN7) flip-flop circuit.. Follow up...

[Donald Tillman]

> On Jan 31, 2024, at 2:02 PM, Donald Tillman <don at till.com> wrote:
> 
> On Jan 31, 2024, at 1:31 PM, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
>> 
>> What do you think about the actual phasings of all the FF’s square wave output against each others?
> 
> Doesn't matter.
> 
> (?!?)
> 
> In a set of octave square waves there are no harmonic or fundamental frequencies in common, so there will be no summing or cancellation happening.
> 

Hold on, I misread the schematic.  The audio signals are pulses, not square waves.   Which is consistent with the heavy low-pass filtering.

Each "driver" stage creates a high-to-low pulse when its input goes positive.  They are roughly 100uSec, 50uSec, 100uSec, 200uSec, and 400uSec long, left to right.  And each pulse is used both to trigger the flop, and is filtered for the audio mix.

  -- Don
--
Donald Tillman, Palo Alto, California
https://www.till.com
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