Available as an assembled Module and as a DIY project.
This Module is currently available.
Frequency Shifter Model 185 clone
Frequency Shifter Model 185 clone.
La Sesenta y Siete 185 Frequency Shifter shifts frequencies contained in the input signal by an amount equal to the applied carrier frequency . Raised and lowered signals are simultaneously available
https://modularaddict.com/185-frequency-shifter-pcb-panel-la67
Hofner 185 Artist Bass$1,786.49
Hofner 185 Artist Bass$1,262.69
Hofner 185 Artist Bass$947.69
Hofner 185 Artist Bass$1,632
Hofner 185$974.82
These merchants probably sell this module. Huh?
BELL & HOWELL 185 Power Speaker Tube