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M

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front pic 800x600
113 kB
by Frontpanelexpress.com
board pic 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 M page
Morsel's M page

 

M (slimline)

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front pic 800x600
102 kB
by Frontpanelexpress.com
top pic 800x600
159 kB
-
rear pic 800x600
88 kB
2x opa637, opa627 on ground channel, 1.5" heatsinks
AMB's M page
Morsel's M page

 

PPA v2.0

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front pic 800x600
95 kB
by Frontpanelexpress.com
total pic 800x600
106 kB
-
board pic 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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front pic 800x600
121 kB
by Frontpanelexpress.com
board pic 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
case pic 800x600
121 kB
nc
rear pic 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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front pic 800x600
100 kB
-
board pic 800x600
174 kB
pcb cut out for clearance
cased up pic 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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front pic 800x600
104 kB
by Frontpanelexpress.com
board pic 800x600
166 kB
3x ad843, 4x opa633 per channel with BGA heatsinks

 

TPA6120

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front pic 800x600
64 kB
by Frontpanelexpress.com
inside pic 800x600
98 kB
TPA6120 + opa627au
total pic 800x547
64 kB
 
Design by and board from DaKil][er

 

Pimeta (maxed out, stationary)

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front pic 800x600
106 kB
by Frontpanelexpress.com
board 800x600
? kB
3x ad843, 4x buf634 stacked buffers per channel, Mundorf MCapZn Silver foil input capacitor
Tangent's PIMETA page

 

Pimeta (portable)

preview comments
pic" pic" Serpac H65 case, translucent blue
pic" pic" 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
pic" pic"
Tangent's PIMETA page

 

Corda HA1-mk2

preview comments
pic frontpanel made by Frontpanelexpress.com
power switch integrated into the frontpanel
blue LED power indicator
pic
pic electrolytic capacitors: Panasonic FM series
Talema/Amveco toroidal transformer
pic high quality film capacitors: polysterene where possible, polypropylene or polyester film in the other positions
pic Alps blue velvet volume potentiometer
pic upgrade: current source resistors replaced by LM334 (like with Corda HA2), set to 4.5mA
pic rear panel: RCA input jacks, power jack
Meier Audio Corda (-> projects -> headamp)

 

CMoy47 (2x opa2132)

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front pic 640x480
96 kB
pretty ugly but pretty cheap and pretty fast built :P
board pic 800x600
131 kB
homemade and handcrafted ...
rear pic 800x600
? kB
nc