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1000W Simple PA Amplifier
1000W Simple PA Amplifier
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Old 16th March 2018, 10:20 AM   #1011
sumeshak is offline sumeshak
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Default Heat on !)k/5W

HI built this soft start and is working correctly.
The 10K/5W resistor gets hot.
Is it normal?

Thanks and regrds,
Sumesh



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Originally Posted by apexaudio View Post
I share many soft-start circuits.
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Old 16th March 2018, 11:49 AM   #1012
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by sumeshak View Post
HI built this soft start and is working correctly.
The 10K/5W resistor gets hot.
Is it normal?

Thanks and regrds,
Sumesh
Yes it is normal.
Regards
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Old 22nd April 2018, 08:33 AM   #1013
makus ele is offline makus ele
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Quote:
Originally Posted by apexaudio View Post
Thanks for posting and comment.
Protection circuit is on separate PCB, balanced input with limiter circuit also.

Regards

please can you direct me to where i can find the protection circuit and the balance input
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Old 8th May 2018, 02:51 AM   #1014
Gurpreet Turna is offline Gurpreet Turna  India
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How many minimum output transistor pairs use on board
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Old 20th July 2018, 06:40 PM   #1015
escorpion12345 is offline escorpion12345
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Funciona? alguien lo armo?
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Old 20th July 2018, 06:43 PM   #1016
Mooly is offline Mooly  United Kingdom
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1000W Simple PA Amplifier


English only please.

Quote:
Works? Someone I arm
(no idea )
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Old 10th August 2018, 11:08 PM   #1017
SAMCPI is offline SAMCPI  Iran
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Quote:
Originally Posted by apexaudio View Post
Setting bias is easy, just adjust about 15 mV on 1R/5W resistors and that is 15mA per output pair or 135mA total.
hi mr. mile and all
Therefore, the voltages on both sides of the 1 ohm resistor should be 135 mV (for 9 pairs of transistors) ...
Is this correct?
Should the input be connected to the ground to adjust the bias?
Thanks

1000W Simple PA Amplifier

Last edited by SAMCPI; 10th August 2018 at 11:26 PM.
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Old 28th September 2018, 06:47 PM   #1018
Lakota Wanagijata is offline Lakota Wanagijata  Ireland
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I Have a qestion also for speaker protection.
is this protection any good for ba1000 amplifier.
im gonna use 80amp auto relay .
can somebody will explain to me ,this 10ohm resistor is in the series with speaker
whether or not the speaker impedance will be it 10ohms more.
for example 4ohm speaker with this 10ohm resistor will had 14 ohm or this resistor
dont have influence on speaker.


And one more question can somebody have connection diagram for bridging this amplifier from 2 channel in 1 bridge channel.
thanks in advance!
Click the image to open in full size. Click the image to open in full size.

Last edited by Lakota Wanagijata; 28th September 2018 at 07:12 PM.
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Old 28th September 2018, 06:57 PM   #1019
44250 is offline 44250  Serbia
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if you are going to use auto - car 12Vdc relay that is going to be a problem due to short distance between relay contacts. it will not be able to make safe contacts opening. as Rolling Stones would sing "Sparks will fly" and contacts would ended welded and speaker protection would miss it's purpose.
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Old 28th September 2018, 07:00 PM   #1020
Lakota Wanagijata is offline Lakota Wanagijata  Ireland
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Quote:
Originally Posted by 44250 View Post
if you are going to use auto - car 12Vdc relay that is going to be a problem due to short distance between relay contacts. it will not be able to make safe contacts opening. as Rolling Stones would sing "Sparks will fly" and contacts would ended welded and speaker protection would miss it's purpose.
What sort of relay you recommend for speaker protection?
thanks for reply.

Last edited by Lakota Wanagijata; 28th September 2018 at 07:14 PM.
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