my little Aleph3

[moamps]

Hi,

this is my new low budget Aleph3 like amp in two mono blocks.
Some specifications are:
Vcc +-20V
Iidle 1,8A
Power 15W
transistors IRF9610, BC550C, 2SK135
transformer 2x16V/150VA per block
caps 50mF per rail

regards

 

[moamps]

in m

my work place

 

[jleaman]

nice work space kinda reminds me of my dads old shop when i was alittle kid : O ) also good work on yuor alephs how do they sound.?

 

[roddyama]

Hi Moamps,

Very nice. You also have a well outfitted workshop for a DIY'er. How do your amps sound?

Rodd Yamashita

 

[moamps]

Neutrik series 3300 measurement card of my amps

 

[moamps]

Hi Moamps,

Very nice. You also have a well outfitted workshop for a DIY'er. How do your amps sound?

Rodd Yamashita

Hi,

thanks, sound is very good for beginning, workshop is on Radio101, Croatia (www.radio101.hr) where I'm chief eng.

 

[joke]

Hi moamp

I was kind a hopeing that you live in Split or somewhere near Knin so that I can come to bug you and lisen those mini amps...nice work...
I am working on aleph 4 or 2 ... ( still colecting parts ) ...
What loudspeakers are you useing ?

 

[moamps]

Re: Hi moamp

[I am working on aleph 4 or 2 ... ( still colecting parts ) ...
What loudspeakers are you useing ? [/B]

Bok, (Hi)

ako budes imao kakvih problema potrazi me na hr.fido.hifi (zzeenn), jos nemam zvucnike, ali imam neke ideje, nista prekomplicirano, Seas driveri.

I don't have any speakers, I'm considering a project with Seas drivers.

 

[roddyama]

I don't have any speakers...

Wait a minute. If you don't have any speakers, how do you know how they sound??

Rodd Yamashita

 

[moamps]

Wait a minute. If you don't have any speakers, how do you know how they sound??

Rodd Yamashita

Hi,
sory, I have few standards monitors like JBL C1, C5, few Sony's, Technics, etc.. On these speakers sound is promising. I have idea to build speakers exactly for this amps.
Sory on my english.

regards

 

[george a]

moamps

Is ther e any chance of you putting uop your schematic for the aleph 3 low budget using the 2k135 mosfets, I would like to see what component values you have used.

Many thanks in advance

George


question to any others, is there anybody out there who can give a definitive answer to the viability of using hafler mosfets in an aleph and if so how?

have about 10 off 2sj49 's 120,000uf caps and 2 off 50V 50A trafos.

please help.

 

[moamps]

Is ther e any chance of you putting uop your schematic for the aleph 3 low budget using the 2k135 mosfets, I would like to see what component values you have used.

Hi,

Schematic is original from Pass site with added cap 1nF on upper BC550.

Regards

 

[george a]

Hi Moamps

Thanks for prompt reply

Am i correct in assuming you just replaced the IRF 244 with 2sk135? and no other changes...

Which transistor does the bc550 replace?

thanks

 

[Bricolo]

Hi Moamps

Thanks for prompt reply

Am i correct in assuming you just replaced the IRF 244 with 2sk135? and no other changes...

Which transistor does the bc550 replace?

thanks

the 2 MPSA18, I think

 

[Da5id4Vz]

Can you post an inside photo?

 

[moamps]

Am i correct in assuming you just replaced the IRF 244 with 2sk135? and no other changes...

Hi,

you are correct.
MPSA18--BC550C
IRF244---2SK135

Regards

Some inside pics:

 

[Boban]

Nice looking amps. Good job.

Boban