Astrotone - Fuzz  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
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modman
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Post by modman »

Some vintage guts!
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Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
Astro Fuzz guts 1967
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The Rotagilla
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Post by The Rotagilla »

I have two questions about the Astrotone circuit...

1) Is there any way to get more output? I don't really hit unity until 1-2 o'clock on the volume knob and wanted to see if that can be improved.

2) Is there any way to get a little more gain/fuzz/distortion?

Thanks! :thumbsup
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Nocentelli
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Post by Nocentelli »

To get more level, you'd need to rework the Q2 output buffer into a gain stage and that would mean the tone pot would behave differently. You could just change it to the Bmp Q4 which would bump up the output. To get more dirt, you could swap to Ge diodes which would clip earlier, or try to increase Q1's gain, maybe upping the 22k or the B-C resistor.
modman wrote: Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...

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