sc350w

[destroyer X]

Yes Jacco...rigth...the correct number is this one you told.

Me gusta mas la Lucia que anda....es mejor que Andalucia.

I prefer Miss Lucia, the one that can walk ...she is better than a stone and concrete town as Andaluzia , Andalucia (Walk Lucy).

regard,

Carlos

 

[elementx]

Does anyone have a PCB available? Or at least the artwork to make one?

 

[elementx]

oh sorry, they're right here... guess i should have looked first!

http://www.siliconchip.com.au/html/pcb04feb.htm

 

[edl]

Dear PM650,

a better realization attached.

Best regards,

Fully version attached,

200W-RMS/4ohm, d<0,1%, 10Hz-30KHz

 

[quasi]

Re: Re: Aaah this one..

Most work to trim and tweak was obviously done in 1989.
Silicon Chip two articles was in 2004, published by 2 authors.
As Silicon Chip and Electronics Australia Magazine both are magazines from Australia,
I guess eventual copyright has been cleared.

Aaaah back from fishing.

I was talking about posting the artwork layouts froom the website. The SC layouts are indeed copyright.

The fish & squid & crabs were delicious.

 

[edl]

This is a bit off topic, but I would be curious to know anyones comments on this amp schem compared to the Studio 350:
http://www.mustangmods.com/data/2197/amp_schematic.jpg
The reason I'm asking is the amp can be purchased in kit form very cheap ($30) with heatsink, and it seems to be similar to the 350 at a glance.

Hi,

Let's buy the kitset, and upgrade that this way.
The offset circut can be cancelled, if the DC-offset in the output isn't bigger than +/-100mV.
It will give you 200W-RMS on 4ohm.

Regards,

 

[mikeks]

Deeply compromised design...

 

[darkfenriz]

Carlos, what are you doing for this baby?

 

[yugaaa]

could anyone post the schematic and the parts list ?

 

[AKSA]

Has anyone seen Carlos/Destroyer?

We all miss him.......

Hugh

 

[edl]

Deeply compromised design...

Yeah, I know it, but it designed for PA, and I wanted to keep it simple, using easly available parts.

Regards,

 

[microchip]

hello edl this is Klaus i think your circuit is really nice i like the
way you adjust dc-offset, off the critical areas (some ppl think so)if your calculations are correct it would sound really good too

Regards

Klaus PH.d

 

[edl]

Hi,

the amp is firstly designed for MJ15003/MJ15004 output transistors. If I use 2SC5200/2SA1943, the currents could be lower, because the 2sc/2sa pair has higher gain.
Anyway the circut works fine with 2sa/2sc outputs too, but 2×12mA current in the second diffamp is unnecessary. We can use only for example 2×6mA, and than the MJE340/350 transistors shouldn't be heatsinked.
This design is not the state of art, but as I wrote, for PA purpouse its enough.
But we can keep the currents higher, with heatsinked MJE trans'. Higher current here means better quality.

If the offset isn't bigger than +/-100mV (in the most cases it not higher, but I don't matching the transistors, so it can be), the 100k resistor (that goes from the offset-circut to the input) need to be eliminated, because offset adjust is unnecessary.

Regards,

 

[idealist2002]

Hi,

Can i use anther output transistors for the SC 350? i have 4 pairs Mj15024 / Mj15025 mounted in a DIY Case.

😀

 

[east electronics]

hello guys

seen this studio 350 and since i like so much simple constructions i wonder if i can get any more information specified about this amp .....

i ve been reading the post through ....and my applications are small pa application where power stability and capabilty on working 100% of power for many hours is the target ( often above quality )

supposed that the rest of the construction is perfect (proper trafo , caps , softstarts cooling ,ground loops and goes on ) is correct do you recoment this amp to my applications ???

thank you sakis....

 

[east electronics]

edl.....

to edl

sorry but looking at the post ....i dont get it ( ????) the 200w 2 4R is the power of the studio 350......?????

cause if it is its a joke

or is it the power of this other schematic ?????

 

[sandyK]

sc350

The Studio 350 is 200W/Ch. 8 ohms and 350W/Ch. 4 ohms

Electronics Australia no longer exists. EA copyright is now owned by Silicon Chip, who also have their back issue articles.

The Studio 350 is streets ahead of those old EA designs.

Carlos, surely you are joking about any modern amplifier with any pretensions to quality, using those slow and antiquated 2N3055/2N2955 ?

Regards
Sandyk