Aion Electronics Azimuth Overdrive Manual - Page 2

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Aion Electronics Azimuth Overdrive Manual
Parts
Resistors
R1
470k
R2
1k
R3
1k
R4
10k
R5
1k
R6
10k
R7
10k
RPD
1M to 2M2
LEDR
4k7
Op-amp selection: In the original, the back of the op-amp was sanded down, so while it's not known for
1
sure, some expert DIY detectives found that it was almost certainly an AD712. The Lovepedal version uses an
unsanded NE5532. Due to the high diode-clipping threshold, this circuit has a particularly strong dependence
on the type of op-amp used, so it's worth experimenting with a few. Other DIY favorites include the OPA2134,
OPA2604, TC2272, MC1458 and LM833.
Clipping diode: Some versions of the Zendrive use another BAT41 here instead of a germanium. It can be
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any type of germanium diode, not just 1N34A.
Drive pot value: The original uses 500kB (linear taper) but I recommend using a 500kA (audio taper).
3
Volume pot value: The original uses 100kB (linear taper) but I recommend using a 100kA (audio taper).
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Additional Part Notes
• Capacitors are shown in nanofarads (n or nF) where appropriate. 1000n = 1uF. Many online suppliers do
not use nanofarads, so you'll often have to look for 0.047uF instead of 47n, 0.0056uF instead of 5n6, etc.
• The PCB layout assumes the use of film capacitors with 5mm lead spacing for all values 1nF through
470nF. I prefer
EPCOS box film
• Potentiometers are Alpha 16mm right-angle PCB mount.
• I recommend using
the board and prevent shorts. If you don't use these, use some electrical tape or cardboard to act as
insulation. The right-angle pots will make direct contact with the solder pads otherwise.
ZENDRIVE / AZIMUTH OVERDRIVE
or
Panasonic
these dust covers / insulators
Capacitors
C1
470n film
C2
100pF
MLCC
C3
100n
C4
3n3
C5
470n film
C6
100uF
electro
C7
47uF
electro
ECQ-B/V-series.
from Small Bear to insulate the back of the pots from
Semiconductors
IC1
AD712
1
D1
1N4002
D2, D4
BAT41
D3
1N34A Ge
Q1, Q2
2N7000
LED
5MM
Potentiometers
Drive
500kA
3
Tone
50kB
Voice
10kB
Volume
100kA
4
2
2