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Old Wireless World project: pitch shifter

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Mike Diack

Jan 1, 1970
0
Does anyone out there have a copy of the "Wireless World" article that
featured an audio pitch shifter (for feedback suppression). It used a pair
of MC1495 4Q multipliers and a 5Hz quadrature oscillator (I built one and
still have it,but have long ago lost the documentation). It would be
sometime around mid 1970s if the datecode of my 1495s is anything to go by.
All I need is the year, month and author's name.
cheers
Mike
 
K

Ken Taylor

Jan 1, 1970
0
Mike Diack said:
Does anyone out there have a copy of the "Wireless World" article that
featured an audio pitch shifter (for feedback suppression). It used a pair
of MC1495 4Q multipliers and a 5Hz quadrature oscillator (I built one and
still have it,but have long ago lost the documentation). It would be
sometime around mid 1970s if the datecode of my 1495s is anything to go by.
All I need is the year, month and author's name.
cheers
Mike

Was that project the 'Dalek' voice unit? IIRC it would have been 76 or 77.

Ken
 
M

Malcolm Moore

Jan 1, 1970
0
Does anyone out there have a copy of the "Wireless World" article that
featured an audio pitch shifter (for feedback suppression). It used a pair
of MC1495 4Q multipliers and a 5Hz quadrature oscillator (I built one and
still have it,but have long ago lost the documentation). It would be
sometime around mid 1970s if the datecode of my 1495s is anything to go by.
All I need is the year, month and author's name.
cheers
Mike

"Frequency Shifter for "Howl" Suppression" by M Hartley Jones, July
1973 p317.
 
M

martin griffith

Jan 1, 1970
0
"Frequency Shifter for "Howl" Suppression" by M Hartley Jones, July
1973 p317.
wasnt it marketed by "surrey electronics"?




martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.
 
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