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Author Topic: 1000 Watts BJT Amplifier  (Read 3993 times)

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Re: 1000 Watts BJT Amplifier
« Reply #60 on: January 23, 2012, 11:42:00 AM »
may nagawa na po ba kayo na amp na ganito newbie po ako d2 gusto kung gumawa ng outdoor PA kaso di ko alam magompisa san po d2 sa dalawang circuit ang ok yung fix po ba bias o yung isa po thx po in advance sa pag assemble lng po ako marunong
you can try the westrak or the laguisma.

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Re: 1000 Watts BJT Amplifier
« Reply #60 on: January 23, 2012, 11:42:00 AM »

Offline musica33

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Re: 1000 Watts BJT Amplifier
« Reply #61 on: January 25, 2012, 01:13:21 PM »
hello po.., 3rd year ECE student po ako and sobrang baguhan pa sa mga ampli.., tanong ko lang po kung magkano aabutin ang gastong nitong ampli design rod elliot...???????

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Re: 1000 Watts BJT Amplifier
« Reply #61 on: January 25, 2012, 01:13:21 PM »

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Re: 1000 Watts BJT Amplifier
« Reply #62 on: January 25, 2012, 05:46:11 PM »
hindi po yan ung kay rod elliot :)

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Re: 1000 Watts BJT Amplifier
« Reply #62 on: January 25, 2012, 05:46:11 PM »

Offline edtechph

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Re: 1000 Watts BJT Amplifier
« Reply #63 on: January 26, 2012, 05:25:38 AM »
mga master napansin ko lang sa layout ng board nito parang may option for mosfet yung output. pwede ba to palitan ng mosfet kaya siguro zener yung nakaseries sa schem

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Re: 1000 Watts BJT Amplifier
« Reply #63 on: January 26, 2012, 05:25:38 AM »

Offline tony

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Re: 1000 Watts BJT Amplifier
« Reply #64 on: January 26, 2012, 07:09:45 AM »
pwede....

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Re: 1000 Watts BJT Amplifier
« Reply #64 on: January 26, 2012, 07:09:45 AM »

Offline edtechph

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Re: 1000 Watts BJT Amplifier
« Reply #65 on: January 29, 2012, 08:54:23 PM »
sir tony parang gusto kung gawin to,any risk ba sa design nito. ok kasi para sakin na hiwalay yung output tranny.
sa opinion nyo sir any error po ba?

Offline tony

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Re: 1000 Watts BJT Amplifier
« Reply #66 on: January 30, 2012, 07:27:58 AM »
sir tony parang gusto kung gawin to,any risk ba sa design nito. ok kasi para sakin na hiwalay yung output tranny.
sa opinion nyo sir any error po ba?

kung dati ka nang nag-aasemble ng power amps, sige go ahead......pero kung first time build, wag muna....start ka sa mas simple na design, like yung 40 watts dito......

with rails of +-85 kaya 300watts per channel....


Offline akoito

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Re: 1000 Watts BJT Amplifier
« Reply #67 on: January 31, 2012, 06:35:01 PM »
may nakapag try na ba nito? sigurado mahihiwalay spirit ko sa body ko pag pinatugtog ito...

Offline amp

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Re: 1000 Watts BJT Amplifier
« Reply #68 on: March 20, 2012, 01:36:18 PM »
if you are reffereng to 1.5kW 4 ohm ni rod elliott.. me nakagawa na non sir.....

Offline Pinoy_Tech

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Re: 1000 Watts BJT Amplifier
« Reply #69 on: March 20, 2012, 05:24:54 PM »
Kung referring sa orig ckt naman like the one attached by sir Tony, almost same idea yan ng kay Melody Amp at may nakapag testing na nun successfully. Ang tinanggal dito sa orig link ay yung thermal ckt, hmmm (I'm afraid of thermal runaway).   

Offline efren

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Re: 1000 Watts BJT Amplifier
« Reply #70 on: March 20, 2012, 05:35:03 PM »
may nakapag try na ba nito? sigurado mahihiwalay spirit ko sa body ko pag pinatugtog ito...
not really , a shattered eardrum & bleeding ears is more likely ;D ;D ;D
"just keep 'em glowing"

Offline danny

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Re: 1000 Watts BJT Amplifier
« Reply #71 on: March 21, 2012, 02:43:13 AM »
 ;D ;D ;D
danny

Offline ricdelros

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Re: 1000 Watts BJT Amplifier
« Reply #72 on: April 10, 2012, 08:46:18 AM »
hindi po yan ung kay rod elliot :)


Looks like a circuit from Dr.Bora of Serbia..The same Drawing Software used by Elliot.

Offline tony

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Re: 1000 Watts BJT Amplifier
« Reply #73 on: April 10, 2012, 08:53:52 AM »
the problem with this scheme is that bias for the output trannies is not fixed, better to use a Vbe multiplier circuit to regulate output stage bias....

this,


or this one:


the VAS formed by MJE340/350 should only swing output voltage, the Vbe multiplier above ensures that idle current bias of the output trannies are held constant in operation....


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Re: 1000 Watts BJT Amplifier
« Reply #73 on: April 10, 2012, 08:53:52 AM »

 

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