900W H-class PA Amp with Limiter - Page 195

irvynejay · 13th February 2012, 09:52 AM

black step driver of m10 / k10 is base on h900 of apex

remle114 · 13th February 2012, 02:17 PM

...

QQ12e5k1 · 13th February 2012, 04:21 PM

Quote:

Originally Posted by irvynejay

black step driver of m10 / k10 is base on h900 of apex

Hey Irvynejay,does your vertex working good??
I saw you have wrong direction on tr bc series on diff stage....

Regards

irvynejay · 13th February 2012, 10:33 PM

OT<
vertex are fine until now still waiting to be pack hehehe

QQ12e5k1 · 13th February 2012, 11:34 PM

Quote:

Originally Posted by irvynejay

OT<
vertex are fine until now still waiting to be pack hehehe

Ow...good job...
But I mean the first pcb you upload that use orange elco...

irvynejay · 13th February 2012, 11:43 PM

ah ok i was using different king of transistor at that time that's why it is on opposite direction
2n3906 /04

iiee3602 · 15th February 2012, 12:35 AM

Sir apex, it is ok to replace optoresistor NSL32 with optotransistor? If ok , please show me the schematic.

mackomester · 17th February 2012, 01:40 PM

Hi all DIYers!

I have the B500 built, it's just about to test. I also plan to build the H900.
A few question about this two amps:
-I have some VTL5C1 lying around, can it be used in the limiter with 47k parallel on resistor side?
-I also have a bunch of MJW21195-MJW21196 pairs, would be they ok instead of 5200-1943?

And one more thing, I want to use the H900 for bass guitar on 4 ohm load. It would be safe enough on low frequencies?

Thanks for any advice, keep up the nice work!

effebi · 17th February 2012, 04:15 PM

Quote:

Originally Posted by mackomester

Hi all DIYers!

-I also have a bunch of MJW21195-MJW21196 pairs, would be they ok instead of 5200-1943?

I belive your Motorolas (ONSEMI) are much BETTER than the 5200/1943 , especially in a PA / Heavy Duty application.
Have a look on SOA curves....

mackomester · 17th February 2012, 04:58 PM

Thats good to hear, I didn't actually check the datasheet.
I have 14 pairs of MJW's, my goal is 1500W on 4 ohms.
Would be that possible with one channel of H900? Or easier
with a bridged B500? I don't want to bridge if not necessary...

13th February 2012, 09:52 AM	#1941
irvynejay diyAudio Member Join Date: Nov 2010 Location: Philippines;Mindanao,Butuan	black step driver of m10 / k10 is base on h900 of apex __________________ Knowing GOD is not being good,Knowing GOD is just knowing him as my friend

13th February 2012, 11:43 PM	#1946
irvynejay diyAudio Member Join Date: Nov 2010 Location: Philippines;Mindanao,Butuan	ah ok i was using different king of transistor at that time that's why it is on opposite direction 2n3906 /04 __________________ Knowing GOD is not being good,Knowing GOD is just knowing him as my friend

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15th February 2012, 12:35 AM	#1947
iiee3602 diyAudio Member Join Date: Jan 2012 Location: Iloilo	Sir apex, it is ok to replace optoresistor NSL32 with optotransistor? If ok , please show me the schematic.

17th February 2012, 01:40 PM	#1948
mackomester diyAudio Member Join Date: Sep 2008	Hi all DIYers! I have the B500 built, it's just about to test. I also plan to build the H900. A few question about this two amps: -I have some VTL5C1 lying around, can it be used in the limiter with 47k parallel on resistor side? -I also have a bunch of MJW21195-MJW21196 pairs, would be they ok instead of 5200-1943? And one more thing, I want to use the H900 for bass guitar on 4 ohm load. It would be safe enough on low frequencies? Thanks for any advice, keep up the nice work!

17th February 2012, 04:58 PM	#1950
mackomester diyAudio Member Join Date: Sep 2008	Thats good to hear, I didn't actually check the datasheet. I have 14 pairs of MJW's, my goal is 1500W on 4 ohms. Would be that possible with one channel of H900? Or easier with a bridged B500? I don't want to bridge if not necessary...

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