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Author Topic: Power Amplifier - 20Wrms/channel : DR20W by 1diy  (Read 5640 times)

Offline n0th1n6

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #20 on: July 19, 2011, 01:31:34 PM »
Got my 4 pcs pcb. PCB quality is good. Nakabili na din ako ng LM1876 pero it says LM1876F. Ano po ba pagkakaiba nito sa TF. Ayun kasi sa datasheet, ang LM1876T ay 7.5Wpc lang at ang LM1876TF yung 20Wpc. Tama po ba?

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #20 on: July 19, 2011, 01:31:34 PM »

Offline Dandy

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #21 on: July 19, 2011, 02:25:41 PM »
Got my 4 pcs pcb. PCB quality is good. Nakabili na din ako ng LM1876 pero it says LM1876F. Ano po ba pagkakaiba nito sa TF. Ayun kasi sa datasheet, ang LM1876T ay 7.5Wpc lang at ang LM1876TF yung 20Wpc. Tama po ba?

T = non isolated package, iyong metal tab ay  conductive
TF = isolated package,  kulay black ang body at non-conductive.

PCB design, the GND is isolated from heatsink GND,  can check that by ohmmeter, puwede T or TF it should be ok, paki post po kung na assembled na, oks.

LM1876 is generally 20Wrms/channel at 4 ohms load, subject to the test criteria.

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #21 on: July 19, 2011, 02:25:41 PM »

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #22 on: July 24, 2011, 03:51:50 PM »
well,  ang pcb price (FR4 2 sided, industry standard, thin plated,  non RoHs compliant) para sa mga interesado na diy build itong amplifer na ito ay 150php/pc,    http://www.1diycentre.com/DIYers_Space_files/Page494.htm,     the kit version is 550php  with PCB+components+heatsink, di pa kasama ang Power Transformer.

Note:
components included speaker terminal, RCA jack,  power cord, wires, speaker, control and inputs



Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #22 on: July 24, 2011, 03:51:50 PM »

Offline tony

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #23 on: July 24, 2011, 05:13:38 PM »
Quote
the kit version is 550php  with PCB+components+heatsink, di pa kasama ang Power Transformer.

price is very very reasonable, does it include shipping?

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #23 on: July 24, 2011, 05:13:38 PM »

Offline n0th1n6

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #24 on: July 24, 2011, 06:15:45 PM »
I should have waited for the whole kit hehe

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #24 on: July 24, 2011, 06:15:45 PM »

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #25 on: August 08, 2011, 12:03:26 PM »
I should have waited for the whole kit hehe

sir, puwede naman i-exchange eh,  para saan ba mga kit na iyan kundi sa mga gustong mag-assembled, to share the experienced, isabay muna din na kunin iyong  MP3 Player.
Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #26 on: August 08, 2011, 12:05:39 PM »
price is very very reasonable, does it include shipping?

Hindi pa po sir,  pero kung nasa around Cavite sa SM Palapala o Baguio po tayo,  puwede meet up na lang, wala na iyong air21fee na 120php.   Anywhere sa pinas, basta naabot ng air21 freight.
Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

Offline n0th1n6

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #27 on: August 08, 2011, 02:54:43 PM »
Ayan sir pwede pa naman pala, anyway di pa naman nadudungisan iyon dahil sinipat ko lang. Me parts na ako kasi gusto ko simulan pag kasama ko magagawa yung chassis.

Text ko na lang sir.

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #28 on: August 13, 2011, 03:01:13 PM »
Ayan sir pwede pa naman pala, anyway di pa naman nadudungisan iyon dahil sinipat ko lang. Me parts na ako kasi gusto ko simulan pag kasama ko magagawa yung chassis.

Text ko na lang sir.

No problem sir,  text na lang po si tita,  kung wala siya sagot pm me o remind ko si tita para siya na text sa iyo, kunin mo na lang iyong complete parts na naka box, saka iyong heatsink,  iyong PCB same pa din naman.

PS, paki check na din ang parts one by one.

Oh yes,  gumagana pala ito sa SMPS kaya puwede na gumamit ng SMPS normally +/- 24 Vdc at 4 ampere,  some SMPS  have +/-24vdc @ 5 ampere,  halos parehas lang ng price sa 4 ampere.
Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

Offline e-tronix

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #29 on: August 14, 2011, 11:03:14 PM »
No problem sir,  text na lang po si tita,  kung wala siya sagot pm me o remind ko si tita para siya na text sa iyo, kunin mo na lang iyong complete parts na naka box, saka iyong heatsink,  iyong PCB same pa din naman.

PS, paki check na din ang parts one by one.

Oh yes,  gumagana pala ito sa SMPS kaya puwede na gumamit ng SMPS normally +/- 24 Vdc at 4 ampere,  some SMPS  have +/-24vdc @ 5 ampere,  halos parehas lang ng price sa 4 ampere.
  sir san kaya mkakuha ng SMPS na yan na pwedi sa DR20W? kaya din niya ibigay ang kaya na curyente ng trafo?pwedi ba tlaga? hirap din maghanap ng trafo at mahal nman.

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #30 on: August 15, 2011, 10:49:57 AM »
  sir san kaya mkakuha ng SMPS na yan na pwedi sa DR20W? kaya din niya ibigay ang kaya na curyente ng trafo?pwedi ba tlaga? hirap din maghanap ng trafo at mahal nman.

diyan sa China, nagkalat ang SMPS, hehehehe.

Sa aking research,  mas maganda at stable ang SMPS, aside na kaya niya ide-liver up to 20amperes, compact at regulated DC na ito,  maganda gamitin ito lalu na sa mga single supply, it turned out na mas mura kesa sa transformer, mas magaan at reliable (daw).

Mayroon di ma-explained sa akin  eh, although gumagana naman at wala naman makita na diperensiya, kung gagamit ng SMPS sa DR20W (o generally power amplifier),  ano po ba ang GND  at saka iyong -V o COM ng SMPS?  Pa help naman sa mga nasa SMPS work,  at sana mayroon makapagbigay sa akin ng pointers,  para ma-evaluate ang SMPS,  mga No load, full load, short circuit, etc.. paano i test ito.   may problema kaya sa  hi-pot,  baka mapanganib, lalu na mga amplifier ay metal case ang kaha.

ang idea kasi,  iyong transformer isolated iyon eh sa 220Vac, medyo safe,  pero ang SMPS, isolated din ba?
Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

Offline tony

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #31 on: August 15, 2011, 12:28:06 PM »
^yung primary side nya hinde.....kaya tawag sa ganyan, off-line smps....

Offline e-tronix

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #32 on: August 15, 2011, 10:14:33 PM »
well,  ang pcb price (FR4 2 sided, industry standard, thin plated,  non RoHs compliant) para sa mga interesado na diy build itong amplifer na ito ay 150php/pc,    http://www.1diycentre.com/DIYers_Space_files/Page494.htm,     the kit version is 550php  with PCB+components+heatsink, di pa kasama ang Power Transformer.

Note:
components included speaker terminal, RCA jack,  power cord, wires, speaker, control and inputs




sir pati pla speakers kasama na sa kit?

Offline 1diyMARKET

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #33 on: August 16, 2011, 09:24:58 AM »
sir pati pla speakers kasama na sa kit?

Hindi po Sir, hindi  kasama ang speaker,  iyong speaker wire connecting the PCB at speaker terminal,  i correct ko po.

Note:
components included speaker terminal, RCA jack,  power cord, wires, speaker, control and inputs

Correction:
components included speaker terminal, RCA jack,  power cord, wires for speaker, control and inputs
iyong mga wires sa  connections ng PCB at Speaker Terminal,  RCA Jack at saka sa Control,  pasensiya na sa typo.

Your Support and Purchase of 1diycentre e’store products is a support to our fellow  hobbyist.  Most of the buyers here at e’store are students who do not have yet source of income.  1diyteam offer monthly payment to some items to help our fellow hobbyist.

Offline e-tronix

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #34 on: August 16, 2011, 09:19:34 PM »
ayan corected na, nagtaka ako yung pinadala niyo skin wlang speakers. hehehe

Offline n0th1n6

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #35 on: August 28, 2011, 12:09:55 AM »
Nakuha ko kit kaninang umaga. Ito at na-assemble ko na. Meron lang atang kelangan baguhin sa PDF kasi nakalagay sa BOM R8, R9. Kung titingnan sa schematic yung 20K na yun ay Rf dapat so R3, R5 dapat sa PCB. Yun lang naman ang napansin ko sa ngaun. Kelangan ko pa i check bukas lahat ng hinang, then saka ko ikabit yung LM1876.





Mga wires, rca jack, speaker terminal, fuse holder, at switch.


Ikinabit ko na din yung 15V regulator kasi baka me maidagdag sa future.

Offline n0th1n6

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #36 on: August 30, 2011, 12:22:51 AM »


Ito ang bidyo hehe

Offline Dandy

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #37 on: September 02, 2011, 02:56:27 PM »
Nakuha ko kit kaninang umaga. Ito at na-assemble ko na. Meron lang atang kelangan baguhin sa PDF kasi nakalagay sa BOM R8, R9. Kung titingnan sa schematic yung 20K na yun ay Rf dapat so R3, R5 dapat sa PCB. Yun lang naman ang napansin ko sa ngaun. Kelangan ko pa i check bukas lahat ng hinang, then saka ko ikabit yung LM1876.

Thanks for pointing the error on the document, for correction on next revision.

There is a video link on your post,  kaso di ko makita/ mabuksan ang video.

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #38 on: September 02, 2011, 04:54:27 PM »
@ sir n0th1n6 congrats po +1 na din hehehe ;D

ano po ang specs ng speaker mo jan sa video :D

Offline elmertronics

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #39 on: September 02, 2011, 05:24:32 PM »
Ito ang bidyo hehe
wow ganyan pala yan kalakas. .

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Re: Power Amplifier - 20Wrms/channel : DR20W by 1diy
« Reply #39 on: September 02, 2011, 05:24:32 PM »

 

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