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|RICK-TONE 'TREM-O-DRIVE' UNIT|
The Trem-O-Drive is a tube-based effect for use with
electric guitar. It combines tremolo and overdrive effects
into a single unit. A 12AX7 dual triode tube boosts the
guitar signal for hotter input to an amplifier and adds
amplitude modulation to the signal to produce the tremolo
effect. Controls consist of a power on/off switch, a
bypass pushbutton, a tremolo in/out pushbutton, and control
knobs for "drive", "depth", and "speed". There were some
minor circuit variations between individual units. The
schematic available here is a representative example of the
I don't have any of the original units (from the 1980s) to
take pictures of. The unit shown here was assembled in
2007 from mostly non-vintage parts. The original units
were housed in a slightly smaller enclosure, without the
fake woodgrain finish, and used different styles of knobs,
jacks, and switches.
If you have one of these units, and have pictures of it that
you're willing to share, I'd appreciate it if you could
e-mail them to me.
Here are some examples of how the Trem-O-Drive sounds.
- clip-1 - Played once without tremolo, then once with.
- clip-2 - Played twice without tremolo, then twice with.
- clip-3 - Played once without tremolo, then once with.
- clip-4 - Played once without overdrive, then once with.
- clip-5 - Played once without overdrive, then once with.
Tremolo And Overdrive Both Active At The Same Time:
- clip-6 - Drive set at about 60% and tremolo depth set at maximum.
If you have one of these units, and have recordings of it
that you're willing to share in any digital format, I'd
appreciate it if you could e-mail them to me.
Here are some links to some discussion threads about the
Trem-O-Drive on the AX84 forum:
And check out the pictures of the cool purple Trem-O-Drive by
koko76 from the AX84 forum:
If you know of another discussion thread or web page about
the Trem-O-Drive, I'd appreciate it if you could
e-mail a link to me.