A Blast from the Past - Custom Flanger

Chuck D. Bones

Circuit Wizard
I built this in 1976 or 1977. It's basically an Electric Mistress with two more knobs. My brother found this in his garage. It's period-correct Electric Mistress right down to the Reticon SAD1024A BBD. Check the date code.

1976 Flanger (dirty) 02.jpg

1976 Flanger innards 02.jpg

1976 Flanger innards 04.jpg

Chips are (L-R):
RCA CA339 quad comparator
National Semi CD4013B
Reticon SAD1024A BBD
National Semi LM1458N dual opamp

I'll post a schematic after I trace this one because the original hand-drawn schematic is long gone.

I have three other goodies that he gave back to me...
Roland AP-2 Phase II with an added DEPTH knob
Modd'ed Fender Blender
An original design two-knob opamp BMP using a rare (these days) Siliconix L144 triple micropower opamp.
 
Last edited:
I built this in 1976 or 1977. It's basically an Electric Mistress with two more knobs. My brother found this in his garage. It's period-correct Electric Mistress right down to the Reticon SAD1024A BBD. Check the date code.

View attachment 122506

View attachment 122507

View attachment 122508

Chips are (L-R):
RCA CA339 quad comparator
National Semi CD4013B
Reticon SAD1024A BBD
National Semi LM1458N dual opamp

I'll post a schematic after I trace this one because the original hand-drawn schematic is long gone.

I have three other goodies that he gave me back...
Roland AP-2 Phase II with an added DEPTH knob
Modd'ed Fender Blender
An original design two-knob opamp BMP using a rare (these days) Siliconix L144 triple micropower opamp.
The flanger looks much better than some professional builds I have seen from that period! Looks beautiful! Does it still work fine? Care to demo it? Cool stuff.
 
I built this in 1976 or 1977. It's basically an Electric Mistress with two more knobs. My brother found this in his garage. It's period-correct Electric Mistress right down to the Reticon SAD1024A BBD. Check the date code.

View attachment 122506

View attachment 122507

View attachment 122508

Chips are (L-R):
RCA CA339 quad comparator
National Semi CD4013B
Reticon SAD1024A BBD
National Semi LM1458N dual opamp

I'll post a schematic after I trace this one because the original hand-drawn schematic is long gone.

I have three other goodies that he gave me back...
Roland AP-2 Phase II with an added DEPTH knob
Modd'ed Fender Blender
An original design two-knob opamp BMP using a rare (these days) Siliconix L144 triple micropower opamp.
So rad!
 
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