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Old 25th November 2010, 04:59 PM   #991
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Quote:
Originally Posted by sekhar View Post
hey ravanlanka hw is ur project going on ...... Can u post some pics of ur pcb ........


regards
sekhar
hi sekhar,

iam waiting for the verification of the pcb by apex.i have posed the pcb for you as well in post 982.

regards


ravs



be a vegeterian......
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Old 25th November 2010, 08:50 PM   #992
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Quote:
Originally Posted by ravslanka View Post
hi sekhar,

iam waiting for the verification of the pcb by apex.i have posed the pcb for you as well in post 982.

regards


ravs



be a vegeterian......
Your PCB is OK (without dable check), but buld prototype is best test.
Regards
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Old 26th November 2010, 04:32 AM   #993
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apex,
workhorse,
& other class h guru's
i have aiwa stereo inquiry,a little bit off topic but still in class h,
model cx-na909u
hav'nt seen schematic yet(if anyone has,i'm badly needed it please)
but from power supply analysis provably class h,
4 pair output,1 pair is 20-0-20 other pair is 40-0-40,
a clicking relay sounds then shut down the power everytime any push button press open/close cd,tuner, etc,
i found rk34(schottky barrier diode)shorted,temporarily replace by in's___ diode amp working but not exeeding volume to 20, amp LV must be working and the HV is not 20 vol up then the power is shut off again,eventually the other rk34 is open,now even the LV is not working.
please help me i have verry small class h knowledge,
but then thanks to apex,for sharing knowledge and experience,thanks also to workhorse for all those support,to mr andrewt the SOA master
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Old 26th November 2010, 10:42 AM   #994
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Location: Ligao City, Albay, Philippines
hi miles,
Can i used IRFZ46N instead of IRF540 and two BY229F instead of MUR1620 in H750 amps?
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Old 27th November 2010, 04:11 PM   #995
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Originally Posted by gooseneck View Post
hi miles,
Can i used IRFZ46N instead of IRF540 and two BY229F instead of MUR1620 in H750 amps?
I use IRFZ44 for H750, many TO220 diodes can be use for H750.
Regards
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Old 30th November 2010, 10:17 AM   #996
Djnits is offline Djnits  Philippines
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have a nice day sir apex...i just want to ask you about the vertex amp...can i remove step driver?and what would be the proper connection?....i have to cut some connection from step driver...it seems like my attachment?

regards


jhun
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Old 30th November 2010, 08:04 PM   #997
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Originally Posted by Djnits View Post
have a nice day sir apex...i just want to ask you about the vertex amp...can i remove step driver?and what would be the proper connection?....i have to cut some connection from step driver...it seems like my attachment?

regards


jhun
You can remove step driver, I suggest to add some DC offset adjust circuit if you don't want use DC servo.
Regards
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Old 1st December 2010, 10:10 AM   #998
Djnits is offline Djnits  Philippines
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Quote:
Originally Posted by apexaudio View Post
You can remove step driver, I suggest to add some DC offset adjust circuit if you don't want use DC servo.
Regards
if add some DC offset, what would be the proper connection sir, can you help me plz, i realy want your vertex amp,...if i make the vertx amp, which is your attachment, it will work Good and what would be the dis advantage and advantage if no step driver?...and how much the wattage w/o step driver? thank more power!!!...


regads
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Old 2nd December 2010, 09:05 PM   #999
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Quote:
Originally Posted by Djnits View Post
if add some DC offset, what would be the proper connection sir, can you help me plz, i realy want your vertex amp,...if i make the vertx amp, which is your attachment, it will work Good and what would be the dis advantage and advantage if no step driver?...and how much the wattage w/o step driver? thank more power!!!...


regads
I prefer DC servo with LF411 or TL071. For simple DC offset adjust use 100R variable resistor instead R73, R75 (47R). Sound is similar to CA and PRO amps of 'crest audio', good for me.
Regards
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Old 2nd December 2010, 09:49 PM   #1000
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NE5532, TL072, LF411
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