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Old 12th February 2013, 03:04 PM   #311
Alettagla is offline Alettagla  Netherlands
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By having less of its consumed energy being turned into heat..

The only thing I can thinhk of is adding an aleph current source but that didnīt work so far. Maybe some clever trick to have this thing move into class a pp or ab

I realy canīt think of another way but that doesnīt mean much, and certainly not that it will therefor be impossible. ........
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Old 12th February 2013, 03:06 PM   #312
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Alettagla View Post
For the moment I hope someone will put me on a track where I can explore further into increasing the efficiency of BA1.

The schematic of how I tried to add an aleph current source wil follow Later
instead of messing up this thread, maybe you better open a thread with your project

and no, I do not have a mod hat on
its not for me to decide what you want

ofcourse its perfectly fine here if other people are interested in your ideas
but if not....you have just presented it, at thats it, and ok too
work on it, come back again and show us what you have
but don't push people if they don't want it

would be perfect to open a thread and show what you are doing, photos, schematics, debate, anything
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Old 12th February 2013, 05:12 PM   #313
Alettagla is offline Alettagla  Netherlands
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Here is the schematic of how I tried to implement an Aleph cs.
(and which oscilated)

Any help or explanation on why this doesnīt work or how it shut be done is most welcom
Attached Files
File Type: pdf scan0086.pdf (624.5 KB, 93 views)

Last edited by Alettagla; 12th February 2013 at 05:22 PM.
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Old 12th February 2013, 06:11 PM   #314
Itsmee is offline Itsmee  England
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Now I have seen your schematic, I'm not surprised it oscillated, it has positive feedback.

Take a look at the Aleph J, look at the phase of the signal at various points in the loop compared to your cct, start at the output, then at the collector of the bias transistor - ok so far, then back at the output of the FET - oops.

http://www.diyaudio.com/forums/pass-...schematic.html

Try moving the connection from the base to the collector.

Also watch the polarity of the cap, it looks like it needs to be reversed.

Last edited by Itsmee; 12th February 2013 at 06:31 PM.
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Old 27th March 2013, 11:07 PM   #315
namesmeanlittle is offline namesmeanlittle  United States
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now i'm gonna attempt this first amp i ever have
and i know this sounds ignorant
but does anyone have a parts list for the power supply?
and does anyone recommend any place to order them?
if you where to double the outputs it would double ohms to 16 ohms right?

Last edited by namesmeanlittle; 27th March 2013 at 11:35 PM.
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Old 29th March 2013, 05:14 AM   #316
noSmoking is offline noSmoking  United States
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Hi Namesmeanlittle,
If you will go to firstwatt.com The Power supply schematic is there(also in the store ),so few parts,just make a list.
Mouser and digi-key have parts,Lots of places to get transformers,torrids are prefered.
The output will depend on how you wire them to the speaker or speakers,These amp's push 4 to 8 ohm EZ,
Have fun and do ask in these forms if you get stuck,Take your time!
Regards,
NS
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Old 29th March 2013, 06:00 AM   #317
Andersonix is offline Andersonix  Sweden
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Call Steve at ApexJr and tell him what you're building, and he can supply transformers, rectifiers, caps, inductors, resistors, wire, connectors, terminal strips, etc...
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Old 29th March 2013, 06:03 AM   #318
namesmeanlittle is offline namesmeanlittle  United States
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thanks
i'm probably gonna make 2 completely separate mono blocks ( i wanted to double outputs thats why i was ohms worried) that match next to each
other with heat sinks on only one side
i wish i had a pic
show you in a couple months when i'm done
add led's and a beaker fans lots of fans so i can run it full
then i'll hook them up to my Sasuie sp 1500's and run it half output like the rest of my system haha.... inside joke
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Old 29th March 2013, 06:07 AM   #319
Andersonix is offline Andersonix  Sweden
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ApexJr also does fans and LEDs!
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Old 29th March 2013, 06:17 AM   #320
namesmeanlittle is offline namesmeanlittle  United States
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hes based out of caly though i don't see a credit card
o and just wandering how much would one of these sell for? i tried looking
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Last edited by namesmeanlittle; 29th March 2013 at 06:25 AM.
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