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Author Topic: P3A amp 100 watts Help  (Read 29590 times)

Offline acer

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Re: P3A amp 100 watts Help
« Reply #360 on: May 08, 2012, 09:30:20 PM »
 tulay ng langam yun   ;D
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Re: P3A amp 100 watts Help
« Reply #360 on: May 08, 2012, 09:30:20 PM »

Offline mund24

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Re: P3A amp 100 watts Help
« Reply #361 on: May 08, 2012, 09:32:02 PM »
tulay ng langam yun   ;D
LOL....malamang hehehe ;D

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Re: P3A amp 100 watts Help
« Reply #361 on: May 08, 2012, 09:32:02 PM »

Offline 01110011

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Re: P3A amp 100 watts Help
« Reply #362 on: May 08, 2012, 10:27:54 PM »
hehe kanina tinest ko baliktad pala yung isang 100uf wasak yung tulay dahil sa explosion ;D ;D

ok din tumnog naman ;D ;D
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Re: P3A amp 100 watts Help
« Reply #362 on: May 08, 2012, 10:27:54 PM »

Offline mund24

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Re: P3A amp 100 watts Help
« Reply #363 on: May 08, 2012, 11:34:52 PM »
hehe kanina tinest ko baliktad pala yung isang 100uf wasak yung tulay dahil sa explosion ;D ;D

ok din tumnog naman ;D ;D
sad to hear that :( kailangan talaga triple check before applying power supply :)

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Re: P3A amp 100 watts Help
« Reply #363 on: May 08, 2012, 11:34:52 PM »

Offline Disabled

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Re: P3A amp 100 watts Help
« Reply #364 on: May 09, 2012, 06:43:39 AM »
but looks heavygatin yung kay sis 1saging, looks convincing yung price, kasi yung iba nyan actual eh rated lang ng 150VA-200VA not true 300VA  peke yung nakalagay kasi nga commercial sya! :)
@1saging ilang kilo yan diameter center and out even height? (toroid trans.)
para hindi tayo mabagabag, sis sag ilang kilo yan?

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Re: P3A amp 100 watts Help
« Reply #364 on: May 09, 2012, 06:43:39 AM »

Offline 01110011

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Re: P3A amp 100 watts Help
« Reply #365 on: May 09, 2012, 07:33:30 AM »
^hindi ko natimbang kasi wala kaming weighing scale ;D ;D
pero estimate ko 4 kilos mabigat din sya

totoo kaya na 8 Amps 'to?

tumunog na nga pala si p3a :D inayos ko kanina
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Offline Johannah Aleksandria

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Re: P3A amp 100 watts Help
« Reply #366 on: May 09, 2012, 02:22:13 PM »
hello mga ka P3A elabers ano kayang hiwaga sa design na ito na amp kasi ang mids niya litaw na litaw kaya ang sound ng guitar buhay na buhay maririnig mo yung pag change fret ng guitarist ng fingers pag slide lalo na sa mga acoustic music. baka dahil sa class A bootstrapped driver combination ng capacitor at resistor? kasi very simple lang ang design sa input stage compare to sakura na me zener pa. at sa vas complimentary pa.taas baba ang trannies.

Batas kasi ng kalikasan na pag maraming dinadaanan, mas marami ang nawawala.
Kaya nearing to the pure state, needs the fewest components.

Yung ibang mahilig sa Class A nga nag-iisip pa ng "zero component". :D :D Kaya yung design minsan napakakunti ng trannies.
Tingnan mo yung tube, iisa.
Generations come and generations go, but the world stays just the same. What has happened before will happen again.

Offline pEN DoTA

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Re: P3A amp 100 watts Help
« Reply #367 on: May 09, 2012, 04:58:42 PM »
makisingit nga.

pwede ba ito sa 20-0-20vac?
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Offline 01110011

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Re: P3A amp 100 watts Help
« Reply #368 on: May 09, 2012, 05:02:55 PM »
^pwede testing ko nga kanina 24vac
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Offline gorex

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Re: P3A amp 100 watts Help
« Reply #369 on: May 10, 2012, 12:17:53 PM »
Mga master ok ba itong output transistor na SANKEN 2SA1186/2SC2837 ginamit ng accuphase amplifier. me nabibili kaya nito na trannies dito? mamahaling amp itong accuphase.

http://www.accuphase.com/cat/e-250_e.pdf
We use negative feedback in audio amplifiers to stabilize the gain, increase the bandwidth,lower the output impedance and lower the non-linear distortion.

Offline gorex

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We use negative feedback in audio amplifiers to stabilize the gain, increase the bandwidth,lower the output impedance and lower the non-linear distortion.

Offline pEN DoTA

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Re: P3A amp 100 watts Help
« Reply #371 on: May 10, 2012, 05:11:28 PM »
^pwede testing ko nga kanina 24vac

thanks sis.
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Offline jlester87

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Re: P3A amp 100 watts Help
« Reply #372 on: May 11, 2012, 01:15:59 PM »
after hours of listening, eto napansin ko sa kanya:

pros
ok yung bass, punchy siya... yung vocals ang strength ng amp na to, saka yung instruments parang totoo

cons
yung highs hindi kasing smooth ng gainclone ko? medyo metallic sound siya
warm yung sound niya, merong ibang details na nawawala...

will find mods para mag improve yung highs nito... try ko ihiwalay sa jvc amp, mukhang nadudumihan yung signal path eh kaya hindi masyadong ok yung highs

Online fantom_mayonaise

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Re: P3A amp 100 watts Help
« Reply #373 on: May 11, 2012, 01:48:46 PM »

will find mods para mag improve yung highs nito... try ko ihiwalay sa jvc amp, mukhang nadudumihan yung signal path eh kaya hindi masyadong ok yung highs

paano ginawa nyo sir, ininsert nyo sya sa JVC amp nyo? parang pinalitan nyo yung existing main amp sa JVC chassis, tapos niretain nyo yung existing volume/tone control and signal selector?

Offline jlester87

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Re: P3A amp 100 watts Help
« Reply #374 on: May 11, 2012, 03:49:28 PM »
paano ginawa nyo sir, ininsert nyo sya sa JVC amp nyo? parang pinalitan nyo yung existing main amp sa JVC chassis, tapos niretain nyo yung existing volume/tone control and signal selector?
yup ganyan nga sir, pero tinap ko lang yung volume control at input niya so parang naka direct na siya... kaya wala na yung tone control/selector/etc.. pero nakaconnect parin kasi yung volume control at input sa circuit ng jvc eh...

Offline abeTIR

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Re: P3A amp 100 watts Help
« Reply #375 on: May 11, 2012, 04:26:33 PM »
alisin mo muna sis, supply sa tone amp at jvc amp tutal hindi naman gumagana...kung tama ang nasa isip ko sa ginawa mo..
"The choice is in the eye of the beholder and in the ear of the listener"
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Offline gorex

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Re: P3A amp 100 watts Help
« Reply #376 on: May 11, 2012, 05:19:47 PM »
try mo laptop or desktop computer using windows media player connect to P3A amp lang walang tone control di ba mas malinaw ang tunog niya. sometimes pag di match sa preamp or tone control masyadong malalim na ang bass malakas na treble at nawawala ibang details.  ;)
We use negative feedback in audio amplifiers to stabilize the gain, increase the bandwidth,lower the output impedance and lower the non-linear distortion.

Offline jlester87

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Re: P3A amp 100 watts Help
« Reply #377 on: May 12, 2012, 04:27:52 PM »
Ok tinanggal ko na sa circuit ng jvc, no preamp, no volume control, straight to sound card... currently listening, ayos! parang ayoko munang gumawa ng ibang amp...pagsawaan ko muna to haha

Offline gorex

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Re: P3A amp 100 watts Help
« Reply #378 on: May 12, 2012, 09:47:16 PM »
ilang watts yang P3A amps mo pareng JLester87 ? ano output trannies mo?
We use negative feedback in audio amplifiers to stabilize the gain, increase the bandwidth,lower the output impedance and lower the non-linear distortion.

Offline jlester87

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Re: P3A amp 100 watts Help
« Reply #379 on: May 13, 2012, 02:05:37 AM »
Eto specs sir...

Toshiba 2sc5200/2sa1943 from newport
Philips bd139, bd140
2n5551, 2n5401 small signal transistors
110ma bias
common heatsink for drivers, vbe and vas, parallel 3x1R 2W emitter resistors
2k trimpot and 1% resistors from alexan
100nf arcotronics metallised polyester from RS
additional onboard 100uf filter cap + 100nf bypass cap
1uf mkp input cap (24pesos for 2pcs sa deeco)
no volume control, straight from encore enma ext. sound card

28-0-28VAC
MSRF860G Rectifier diodes
2200uf x8 rubicon caps
100nf bypass caps for power supply


Ok na yung highs niya, pantay na ng gaincloned surround processor ko sa details and silky smoothness, (like my gainclone) dinig din yung echo ng snare, voice at ambience sa ilang songs (hindi kaya to ng ibang amp ko) ... at higit sa lahat masarap pakinggan, magdamag ako nakinig ng music kanina :D
no plan for mods yet...

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Re: P3A amp 100 watts Help
« Reply #379 on: May 13, 2012, 02:05:37 AM »

 

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