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17th May 2010, 02:24 PM
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#1 |
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diyAudio Member
Join Date: Jun 2008
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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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EMIX Last edited by EMX_125; 17th May 2010 at 02:45 PM. |
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17th May 2010, 10:58 PM
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#2 | |
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diyAudio Member
Join Date: Apr 2008
Location: Carlisle, England
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Quote:
You have one of the output transistors bases connected to the B- line !
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http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software. |
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18th May 2010, 02:30 PM
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#3 |
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diyAudio Member
Join Date: Jun 2008
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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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EMIX Last edited by EMX_125; 18th May 2010 at 02:34 PM. |
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18th May 2010, 02:47 PM
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#4 |
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diyAudio Member
Join Date: May 2006
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Why did you have to repair it ??? Can you show a pic of the amp??
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18th May 2010, 03:17 PM
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#6 | |
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diyAudio Member
Join Date: Jun 2008
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Quote:
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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EMIX |
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18th May 2010, 04:18 PM
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#7 |
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diyAudio Member
Join Date: May 2006
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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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18th May 2010, 04:36 PM
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#8 | |
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diyAudio Member
Join Date: Jun 2008
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Quote:
But_the_same_voltage?
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EMIX |
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18th May 2010, 04:51 PM
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#10 | |
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diyAudio Member
Join Date: Jun 2008
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Quote:
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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EMIX Last edited by EMX_125; 18th May 2010 at 04:56 PM. |
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