[sdiy] 20ms delay? analog allpass filter?

[René Schmitz]

Am 09.02.2023 um 14:18 schrieb Ben Stuyts:
>
>> I guess one can say that in the 1930s Hammond did a mechanical way, 
>> because that was doable.
>
> That just reminded me that I have an old Schaller Rotor Sound which 
> does something similar with a ton of inductors. See attached schematic.


That looks crazy. It looks they're saturating the cores, and thus 
varying the delay time of the transmission line magnetically.


Best,

  René
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