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Old 17th May 2010, 03:24 PM   #1
EMX_125 is offline EMX_125  Philippines
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Default PO3_150W_Power_amp

anyone_on_diyaudio_pls_help_to_upgrade_my_amplifie r
i_add_2pair_of_power_transistor_and_replace_input_ transistor
for_the_supply_55V-0-55VDC._if_i_mistake_pls_help.

Here_is_the_circuit_diagram...

http://img295.imageshack.us/img295/8...0wpoweramp.png
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Last edited by EMX_125; 17th May 2010 at 03:45 PM.
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Old 17th May 2010, 11:58 PM   #2
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Quote:
Originally Posted by EMX_125 View Post
anyone_on_diyaudio_pls_help_to_upgrade_my_amplifie r
i_add_2pair_of_power_transistor_and_replace_input_ transistor
for_the_supply_55V-0-55VDC._if_i_mistake_pls_help.

Here_is_the_circuit_diagram...

http://img295.imageshack.us/img295/8...0wpoweramp.png
The diagram looks wrong to me.

You have one of the output transistors bases connected to the B- line !
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Old 18th May 2010, 03:30 PM   #3
EMX_125 is offline EMX_125  Philippines
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Default PO3_Power_Amp

sorry_for_My_mistake.....
the_amplifier_is_made_in_china_but_the_diagram
is_draft_me_when_i_repair_this_amp_i,ll_make_to_dr aft
the_amplifier_circuit_design_for_i_know_the_design _of_the_amplifier
however_the_drafting_me_is_wrong
thank_for_the_reply_nigel...sorry_for_my_bad_engli sh.




here_is_the_correct_circuit_diagram...


http://img257.imageshack.us/img257/8...0wpoweramp.png
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Last edited by EMX_125; 18th May 2010 at 03:34 PM.
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Old 18th May 2010, 03:47 PM   #4
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Why did you have to repair it ??? Can you show a pic of the amp??
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Old 18th May 2010, 04:14 PM   #5
81bas is offline 81bas  Germany
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Collector and emitter of Q7 should be swapped...
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Old 18th May 2010, 04:17 PM   #6
EMX_125 is offline EMX_125  Philippines
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Quote:
Originally Posted by homemodder View Post
Why did you have to repair it ??? Can you show a pic of the amp??

Because_the_power_supply_The_bridge_diode_is_smoke _and_burn_when_the_amplifier_is_working_full_power _24hours_at_my_service..
wedding_party...hehehe...so_replace_the_bridge_dio de_25amp_400V.
but_i_need_to_upgrade_this_amplifier_for_more_powe r_the_same.
ok_if_you_like_to_see_the_amplifier_tommorrow_nigh t_i_upload_the_pic.
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Old 18th May 2010, 05:18 PM   #7
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81bas is right, have to swap the legs of q7. The biggest obstacle to upgrade for more power is requirement for higher VA transformer. You need to be prepared to replace the transformer.
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Old 18th May 2010, 05:36 PM   #8
EMX_125 is offline EMX_125  Philippines
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Quote:
Originally Posted by homemodder View Post
81bas is right, have to swap the legs of q7. The biggest obstacle to upgrade for more power is requirement for higher VA transformer. You need to be prepared to replace the transformer.


But_the_same_voltage?
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Old 18th May 2010, 05:42 PM   #9
frank1 is offline frank1  United Kingdom
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Quote:
Originally Posted by EMX_125 View Post
But_the_same_voltage?
Why_the_underscores?
Is this a new language?
Makes reading very difficult :-(
FDJ
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Old 18th May 2010, 05:51 PM   #10
EMX_125 is offline EMX_125  Philippines
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Quote:
Originally Posted by frank1 View Post
Why_the_underscores?
Is this a new language?
Makes reading very difficult :-(
FDJ

Im_not_a_good_speaking_english
this_thread_is_about_the_amplifier_not_a_language.
underscore?.....the_keyboard_of_my_PC_is_damage
very_difficult_to_type_tommorrow_i_replace_the_key board
hehehee....thanks.
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Last edited by EMX_125; 18th May 2010 at 05:56 PM.
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