40W Power Amplifier
+13
alvinquimbo
natad123
Ahmadiloz
snodmira
Lenaren
Deep Bass
Baby Ampli
james
DJFEL
arkin
01110011
Hertz
Electro
17 posters
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Re: 40W Power Amplifier
slamat po..@sir ultra bakit kelangan ishort to ground?@sir james hilig mo talaga matulog sis..^_^
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
pra msiguro mong wlang input distortion,klangan short mo yong input,minsan npagkamalan ksing dc offset ang input distortion due to improper grounding,poor component layout,shielding at kong anuanu pa
arkin- D Battery
- Posts : 446
Join date : 2011-12-02
Re: 40W Power Amplifier
@sir arkin ganun pala yun..salamat po sa explanation sir at least may natutunan naman ako..Sir arkin tanong ko ulit,ano pala tong dc offset?kung tama ba ako sir arkin yung input distortion is yung parang may humming kang maririnig kahit wala pang input?tama po ba?
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
ayon cnagot na pala ni Sis James ang tanong.
inshort nka-mute or nka minimum ang settings ng volume control jan... kaya wlng makakapasok na audio signal sa Amp..
isa ding yang haba ng wire sa input ng amp... pg sobrang haba. madalas nagiging antenna xa kaya nakaka pick up ng RF station.
DC offset. masusukat mo yan sa output side ng amplifier.
kong baga sinusukat mo ang amplifier na wala ka pang signal at naka standby lang.. dpat nasa mV lang ang msusukat mo jan... pg yan ay sobrang taas ay nako tiyak my DC na binabato ang amp mo ^_^
inshort nka-mute or nka minimum ang settings ng volume control jan... kaya wlng makakapasok na audio signal sa Amp..
isa ding yang haba ng wire sa input ng amp... pg sobrang haba. madalas nagiging antenna xa kaya nakaka pick up ng RF station.
DC offset. masusukat mo yan sa output side ng amplifier.
kong baga sinusukat mo ang amplifier na wala ka pang signal at naka standby lang.. dpat nasa mV lang ang msusukat mo jan... pg yan ay sobrang taas ay nako tiyak my DC na binabato ang amp mo ^_^
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ultrasonic™- 24V BATTERY
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Re: 40W Power Amplifier
a dc offset can be anywhere to 1mV to 50mV
but there are some amp that can go higher than 50mV
but it is normal, depende sa amp iyan
but there are some amp that can go higher than 50mV
but it is normal, depende sa amp iyan
Re: 40W Power Amplifier
Push pull kasi yata itong ampli ni sir. Kaya kailangan meron dc offset para hindi para na lang biglang sumisigaw yung ampli kapag mahina ang volume.
Kasi meron pang 0.7 volt na kakainin bago gumana yung ampli. Kaya medyo tinataas ang boltahe niya para kapag mahina ang input eh nagcoconduct na rin siya.
Pakitama na lang po kung mali ako.
Kasi meron pang 0.7 volt na kakainin bago gumana yung ampli. Kaya medyo tinataas ang boltahe niya para kapag mahina ang input eh nagcoconduct na rin siya.
Pakitama na lang po kung mali ako.
james- 24V BATTERY
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Re: 40W Power Amplifier
@ mga master,salamat sa mga sagot nyo..at least naliwanagan na ako..ganun pala yun..tanong ulit sis james anung ibig sabihin mo na kakain pa sya ng 0.7v bago gumana ang ampli??
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
Masters na lang po bahala dun.
Ito lang po karagdagan na lang po.
Ito lang po karagdagan na lang po.
james- 24V BATTERY
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Re: 40W Power Amplifier
DC offset should be low as possible
the lower the better, the reason for this DC offset showing up
is because of the unmatched differential input transistors.
If you have a perfect matched HFE transistors then the DC offset is really really low.
some amplifier design has a trimmer so you can adjust the DC offset
the lower the better, the reason for this DC offset showing up
is because of the unmatched differential input transistors.
If you have a perfect matched HFE transistors then the DC offset is really really low.
some amplifier design has a trimmer so you can adjust the DC offset
Re: 40W Power Amplifier
ganon pala iyon master danny. mas mababa mas maganda. +1 po sa inyo.
na solve na po talaga ang ampli ko
na solve na po talaga ang ampli ko
Electro- 24V BATTERY
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Re: 40W Power Amplifier
salamat sa puntos
hope you are enjoying the sound quality of that amp.
+1 ka din for sharing your experienced.
hope you are enjoying the sound quality of that amp.
+1 ka din for sharing your experienced.
Re: 40W Power Amplifier
Sir danny tanong lang, dapat bang regulated talaga ang supply ng tone control, mic preamp at mixer kapag kinakabit sa ampli.. So kung ganun dapat may karagdagang circuit gaya ng 7812 para regulated..salamat for reply..
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
mkikiagre nlang ky sir danny
@james:prang transistor biasing yang tinutukoy mo ah.
@alvin:ok lng na d regulated,basta will filtered ang suply mo..
@james:prang transistor biasing yang tinutukoy mo ah.
@alvin:ok lng na d regulated,basta will filtered ang suply mo..
arkin- D Battery
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Re: 40W Power Amplifier
@sir danny at @sir arkin, tanong ko lang ilang amps ng fuse ang dapat ilagay sa amp nato? wala kasi sa listahan?Syanga pala sir danny tanong ako ulit ha pag nabuo ko nato,kapos pa sa budget..sana madaan ka dito sir para malaman ko ilang amps yung fuse...?
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
@sir arkin salamat sa sagot,pwede pala di regulated basta proper filtered lang sya..salamat po..
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
@sir danny syanga pala,pwede na ba yung #30 awg na magnetic wire ang gagamitin para L1 nito yung sinabi ni sir ultra?
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
@master alvin. 4-5A ang fuse.
Electro- 24V BATTERY
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Re: 40W Power Amplifier
@sis electro salamat sa reply..tanong ko lang sis,ilang watts ng speaker ang kaya nito?
alvinquimbo- 12V BATTERY
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Re: 40W Power Amplifier
alvinquimbo wrote:Sir danny tanong lang, dapat bang regulated talaga ang supply ng tone control, mic preamp at mixer kapag kinakabit sa ampli.. So kung ganun dapat may karagdagang circuit gaya ng 7812 para regulated..salamat for reply..
you can use non regulated but it is highly recommended na regulated talaga ito
Re: 40W Power Amplifier
alvinquimbo wrote:@sir danny at @sir arkin, tanong ko lang ilang amps ng fuse ang dapat ilagay sa amp nato? wala kasi sa listahan?Syanga pala sir danny tanong ako ulit ha pag nabuo ko nato,kapos pa sa budget..sana madaan ka dito sir para malaman ko ilang amps yung fuse...?
you can use 5 A sa rails nito]
Re: 40W Power Amplifier
Nakabinbin paggawa ko neto, maulan kasi.
james- 24V BATTERY
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Re: 40W Power Amplifier
sa mga di pa nakakagawa nito. wag niyo kaligtaan ilagay din sa heatsink ang q7 = d669
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Hertz- Admin
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Re: 40W Power Amplifier
@sir danny,salamat sa reply at ganun din sayo sis electro..balitaan lang ko kayo pag tapos natong ginagawa ko..jejejeje
alvinquimbo- 12V BATTERY
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