Good day Andrew sins you have experience in APEX H900 in particular power amp i have a question
1. The power supply of protect circuit did you separate it from the main Transformer?
2. Did you put Balance input circuit?
why i am asking this because i am data & experience of many DIYer who made this H CLASS, this my first time to make or assemble an H CLASS power amp i had experience but in simple power amp 100W so please don't get annoyed for my many question k & how is your APEX H900 going?
1. The power supply of protect circuit did you separate it from the main Transformer?
2. Did you put Balance input circuit?
why i am asking this because i am data & experience of many DIYer who made this H CLASS, this my first time to make or assemble an H CLASS power amp i had experience but in simple power amp 100W so please don't get annoyed for my many question k & how is your APEX H900 going?
hi darwinbibit
greetings
1 seperate 18 0 18 volts 1 ampere transformer used
2 no balance input used
3 very good amplifier thanks to apex audio
always a first time for everyone same was for me building the amplifier is easy
sourcing parts very hard BUILD IT YOU WONT REGRET IT
thanking you
andrew lebon
greetings
1 seperate 18 0 18 volts 1 ampere transformer used
2 no balance input used
3 very good amplifier thanks to apex audio
always a first time for everyone same was for me building the amplifier is easy
sourcing parts very hard BUILD IT YOU WONT REGRET IT
thanking you
andrew lebon
hi apexaudio
greetings trying to build vertex amplifier can you please tell me
1 which resistances are 1 watt or more in amplifier circuit
2 which transistors are attached to heatsink for thermal compensation
3 how is supply given to servo feedback ic tlo72
hoping you can help me out never made a amplifier of such power
will building the supply 3 step and amp on seperate pcb ok as i dont know
how to use pcb software hand drawing pcb for me is the only solution
thanking you
andrew lebon
greetings trying to build vertex amplifier can you please tell me
1 which resistances are 1 watt or more in amplifier circuit
2 which transistors are attached to heatsink for thermal compensation
3 how is supply given to servo feedback ic tlo72
hoping you can help me out never made a amplifier of such power
will building the supply 3 step and amp on seperate pcb ok as i dont know
how to use pcb software hand drawing pcb for me is the only solution
thanking you
andrew lebon
Emitter resistors are 0R22/5W, 1W resistors have notification
T21 is on heatsink for BIAS compensation
TL072 use +/-15V from protect PSU, I suggest you to use single OP TL071 or LF411 for each channel.
Regards
There is coolets H900 version with TL071 step drivers, if you buid it, please share expirience.
Regards
Yes, any amp in classH work in classAB, step driver only expand rail voltage for outputs at high power. 15034/15035 are on main heatsink.
Vertex amp is based on crest amps, there is link in post #828, you can see schematics.
Regards
hello sir very nice pcb.pls can u tell how can i make like dis.....????
the procedure is just like printing a T shirt with silkscreen i used high quality enamel,,,
there is a modification on this PCB here
http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-66.html
post # 659
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