900W H-class PA Amp with Limiter

[engel dela pena]

if the left side is genuine they where selling counterfeit here
for 4.44usd/pc

 

[engel dela pena]

apex
apex can this counterfeit 5400/1943 stand in the h900 requirements
are they reliable in terms of giving the max power and stability
or i'd rather go mjl21193/4
this one i'm sure its genuine here

 

[megajocke]

Oh no, the left one is the fake and the right one is original. The originals use quite faint printing. If you can read the type number easily it's likely to be a fake!

 

[engel dela pena]

Oh no, the left one is the fake and the right one is original. The originals use quite faint printing. If you can read the type number easily it's likely to be a fake!

ok thank you
5200 is cheaper than 21193
i'll go for the 5200's

 

[engel dela pena]

bf421 can be replaced by f421?

 

[engel dela pena]

2n5401 same as bf421?

 

[apexaudio]

2n5401 same as bf421?

NO

 

[apexaudio]

BF421 PNP 300V 0,1A 0,83W pin: E C B
2N5401 PNP 160V 0,6A 0,31W pin: E B C

 

[apexaudio]

bf421 can be replaced by f421?

BF421 can be replaced by BF872

 

[engel dela pena]

huh

 

[engel dela pena]

truly handmade,
i hope i can do this like andrewlebon

 

[engel dela pena]

BF421 can be replaced by BF872

is bf421 european made?
is there any replacement near us?
u.s. or japanese brands
also bav21 and nsl32?
pls. help

 

[apexaudio]

is bf421 european made?
is there any replacement near us?
u.s. or japanese brands
also bav21 and nsl32?
pls. help

MPSA92 can use but with diferent pins E B C ( BF421 pins E C B )
BAV21 can be replaced with BYD33D
NSL32 can be replaced with any optoresistor

 

[engel dela pena]

apex
thank you cased closed

 

[apexaudio]

Gnd

GND wirening

 

[engel dela pena]

mpsa93 this is 200v
can i use this one?

 

[engel dela pena]

apex
is bridge mode a seperate circuit?

 

[apexaudio]

apex
is bridge mode a seperate circuit?

No, just need a swich beetwin point A on one and point B on second channel, I will post schematics for wireing.

 

[apexaudio]

mpsa93 this is 200v
can i use this one?

MPSA92 is not hard to find.

 

[apexaudio]

H900 bridge

Apex h900 bridge mode