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chip amps
M³
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preview |
size |
comments |
front |
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800x600 113 kB |
by Frontpanelexpress.com |
board |
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800x600 155 kB |
3x ad843, Panasonic FM, Wima MKS, Vishay-Dale CMF-55-143 (non-magnetic), Panasonic ECQP Polypropylene Film, Alps RK 27112 50k log, 2.5" heatsinks, high performance kapton insulators |
AMB's M³ page
Morsel's M³ page
M³ (slimline)
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preview |
size |
comments |
front |
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800x600 102 kB |
by Frontpanelexpress.com |
top |
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800x600 159 kB |
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rear |
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800x600 88 kB |
2x opa637, opa627 on ground channel, 1.5" heatsinks |
AMB's M³ page
Morsel's M³ page
PPA v2.0
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preview |
size |
comments |
front |
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800x600 95 kB |
by Frontpanelexpress.com |
total |
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800x600 106 kB |
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board |
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800x600 ??? kB |
3x ad843, 3x MJE243/MJE253, Panasonic FM, Wima MKS, Vishay-Dale CMF-55-143 (non-magnetic), Alps RK 27112 50k log, Q3=bf245c (quiscient current ad843=13mA !) ,bias 30mA (2.2Ohm 66mV) |
Tangent's PPA v2 page
Morsel's PPA v2 page
PPA v2.0 mod
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preview |
size |
comments |
front |
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800x600 121 kB |
by Frontpanelexpress.com |
board |
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800x600 140 kB |
3x ad744 with bypassed output stage, R21/R22/R31/R32 = 160 Ohms for higher voltage swing
3x MJE243/MJE253, Panasonic FM, Wima MKS, Alps RK 27112 50k log, bias 30mA (2.2Ohm 66mV)
R10 and R11 socketed to support opamp rolling
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case |
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800x600 121 kB |
nc |
rear |
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800x600 112 kB |
nc |
Tangent's PPA v2 page
Morsel's PPA v2 page
PPA v1.1 (with Glassman Diamond Buffers)
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preview |
size |
comments |
front |
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800x600 100 kB |
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board |
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800x600 174 kB |
pcb cut out for clearance |
cased up |
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800x600 134 kB |
3x ad843, Glassman Diamnond Buffers revision 2, Panasonic FM, Wima MKS, Vishay-Dale CMF-55-143 (non-magnetic), Alps RK 27112 50k log |
PPA v1.1 (with monolithic buffers)
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preview |
size |
comments |
front |
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800x600 104 kB |
by Frontpanelexpress.com |
board |
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800x600 166 kB |
3x ad843, 4x opa633 per channel with BGA heatsinks |
TPA6120
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preview |
size |
comments |
front |
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800x600 64 kB |
by Frontpanelexpress.com |
inside |
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800x600 98 kB |
TPA6120 + opa627au |
total |
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800x547 64 kB |
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Design by and board from DaKil][er
Pimeta (maxed out, stationary)
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preview |
size |
comments |
front |
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800x600 106 kB |
by Frontpanelexpress.com |
board |
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800x600 ? kB |
3x ad843, 4x buf634 stacked buffers per channel, Mundorf MCapZn Silver foil input capacitor |
Tangent's PIMETA page
Pimeta (portable)
preview |
comments |
| Serpac H65 case, translucent blue |
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ad8610 + ad8620 + 3x buf634
biased to class-A with jfet cascodes
ALPS RK097 10k volume potentiometer with on/off-switch
electrolytoc capacitors: Panasonic FM
film capacitors: Wima MKS 3.3µF
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Tangent's PIMETA page
Corda HA1-mk2
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comments |
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frontpanel made by Frontpanelexpress.com
power switch integrated into the frontpanel
blue LED power indicator
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electrolytic capacitors: Panasonic FM series Talema/Amveco toroidal transformer |
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high quality film capacitors: polysterene where possible, polypropylene or polyester film in the other positions |
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Alps blue velvet volume potentiometer |
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upgrade: current source resistors replaced by LM334 (like with Corda HA2), set to 4.5mA |
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rear panel: RCA input jacks, power jack |
Meier Audio Corda (-> projects -> headamp)
CMoy47 (2x opa2132)
view |
preview |
size |
comments |
front |
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640x480 96 kB |
pretty ugly but pretty cheap and pretty fast built :P |
board |
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800x600 131 kB |
homemade and handcrafted ... |
rear |
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800x600 ? kB |
nc |
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