After some several test and adjustment for how many months to make this Diy amp i will share to all diyers with the permission and support of apexaudio
Who ever want to make the amp or edit/modify the layout is free to do what ever he/she want...
I will only share what i learn on this diy amp,,(I'm not a PRO)
There is no Schematic i only use or base on original schematic of cr@@t and vertex shared by apex
Some changes was made during test
test voltage only at 60/120 -/+
i only use 2sc5200/2sa1943 for test
Amp i made only 2 stepper
final power transistor should be mjl4281/4302 or mjl21195/21196 Or 2sc4029/2sa1553
2 mje15034 replace mje13007
2 mje15035 replace mje5851 or 5852
mje transistor should be mounted on main heat sink,, i don't have the time to reedit the pcb,,(Looking forward to the new Project)
zobel network from 103/250v/4.7r replace 473/250v/ 4.7r 5w
BC550/560 replace 2n3906/3904
Dc servo ic Is LF411
added balance -/+ input with sensitivity switch
link of schematic used:
Download crest.rar from Sendspace.com - send big files the easy way
Who ever want to make the amp or edit/modify the layout is free to do what ever he/she want...
I will only share what i learn on this diy amp,,(I'm not a PRO)
There is no Schematic i only use or base on original schematic of cr@@t and vertex shared by apex
Some changes was made during test
test voltage only at 60/120 -/+
i only use 2sc5200/2sa1943 for test
Amp i made only 2 stepper
final power transistor should be mjl4281/4302 or mjl21195/21196 Or 2sc4029/2sa1553
2 mje15034 replace mje13007
2 mje15035 replace mje5851 or 5852
mje transistor should be mounted on main heat sink,, i don't have the time to reedit the pcb,,(Looking forward to the new Project)
zobel network from 103/250v/4.7r replace 473/250v/ 4.7r 5w
BC550/560 replace 2n3906/3904
Dc servo ic Is LF411
added balance -/+ input with sensitivity switch
link of schematic used:
Download crest.rar from Sendspace.com - send big files the easy way
Attachments
offset .3mv .,, voltage across .22 5w resistors 10mv idle
1.2vac 50hz sine wave on input and output 85vac reading ,,clip at 85vac 4r 1000w speaker load
1.2vac 50hz sine wave on input and output 85vac reading ,,clip at 85vac 4r 1000w speaker load
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i already get more than 1500w on 60/120vdc using 2cs5200/1943
using MJL4281/4302 and 75/145 we can achieve 2500w in 4 r
with good psu and filters
offset .3mv .,, voltage across .22 5w resistors 10mv idle
1.2vac 50hz sine wave on input and output 85vac reading ,,clip at 85vac 4r 1000w speaker load
@ Sir Mile i hope you have good limiter and protect circuit for this amp
using MJL4281/4302 and 75/145 we can achieve 2500w in 4 r
with good psu and filters
offset .3mv .,, voltage across .22 5w resistors 10mv idle
1.2vac 50hz sine wave on input and output 85vac reading ,,clip at 85vac 4r 1000w speaker load
@ Sir Mile i hope you have good limiter and protect circuit for this amp
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