Aleph 30 lauout

Asen · 21st November 2004, 01:24 PM

I would highly appreciate any comments on my Aleph 30 layout.

Thanks
Asen

wuffwaff · 21st November 2004, 03:29 PM

Hi,

I like the dip for paralleling resistors to R19. Why don´t you make another one for R21? This way you can change bias and ac-current-gain very fast.

William

Asen · 21st November 2004, 04:10 PM

wuffwaff,

Thanks. Actually the dip switch is optional and I intended not to use it – just to drill the holes. At the beginning I thought it was wise, but after that I decided to use bigger heat sinks and not to change the bias during summers.

I have Odin (MTM) speakers, which are relatively heavy load. So I’d prefer higher bias. But thanks for the idea. Maybe I’ll manage to put an optional R21 parallel resistor using the same dip switch.

Regards
Asen

Asen · 21st November 2004, 04:22 PM

BTW, in the first versions there was one more dip switch that was intended to disconnect the four protection zener-diodes after connecting the cables. I wanted the zeners out of the circuit when operating because of possible negative effects. After that I gave up this idea too.

jam · 21st November 2004, 09:41 PM

Great layout.

You should expand it so that it can be used as an Aleph2 (60) ...........Group buy anyone?

Regards,
Jam

Asen · 22nd November 2004, 08:26 PM

Thanks jam. If there’s somebody interested I can send him (her) the Eagle files. It won’t be difficult to be rearranged to Aleph 2. But I don’t sell PCBs. So, no group orders. No orders at all. I just want comments. Especially comments that would show me mistakes or bring me improvements.
I have better looking versions of the layout but this one is with the shortest signal paths.

Regards

mpmarino · 23rd November 2004, 02:55 PM

Ansen,
I like your layout and am considering a version (self etched) for an aleph 30 I would like to build. Assuming you don't mind my 'copying' some of your layout, could you tell me the intended size of the board for scaling.

Quote:

If there’s somebody interested I can send him (her) the Eagle files

I would be appreciative if you would send me the files.
mpmarino@gmail.com

Thanks in advance,
Marc

Asen · 23rd November 2004, 03:21 PM

mpmarino,

The PCB is 13/9 cm. Sorry but where I live we don't use inches.

Regards

mpmarino · 3rd February 2005, 01:08 PM

Asen,
I have a question on your layout. You are showing a 1uf capacitor in parallel with Z5. I do not see this on Mr. Pass's schematic. What is it's purpose? I am probably missing something....

Thanks,
Marc

Stabist · 3rd February 2005, 02:27 PM

@mpmarino - I think a very good explanation is hidden in "10 ways how to improve Aleph" topic ...

21st November 2004, 03:29 PM	#2
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	Hi, I like the dip for paralleling resistors to R19. Why don´t you make another one for R21? This way you can change bias and ac-current-gain very fast. William __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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21st November 2004, 04:10 PM	#3
Asen diyAudio Member Join Date: Jan 2001 Location: Sofia	wuffwaff, Thanks. Actually the dip switch is optional and I intended not to use it – just to drill the holes. At the beginning I thought it was wise, but after that I decided to use bigger heat sinks and not to change the bias during summers. I have Odin (MTM) speakers, which are relatively heavy load. So I’d prefer higher bias. But thanks for the idea. Maybe I’ll manage to put an optional R21 parallel resistor using the same dip switch. Regards Asen

21st November 2004, 04:22 PM	#4
Asen diyAudio Member Join Date: Jan 2001 Location: Sofia	BTW, in the first versions there was one more dip switch that was intended to disconnect the four protection zener-diodes after connecting the cables. I wanted the zeners out of the circuit when operating because of possible negative effects. After that I gave up this idea too.

21st November 2004, 09:41 PM	#5
jam diyAudio Member Join Date: May 2001 Location: Charlotte,NC,USA	Great layout. You should expand it so that it can be used as an Aleph2 (60) ...........Group buy anyone? Regards, Jam

22nd November 2004, 08:26 PM	#6
Asen diyAudio Member Join Date: Jan 2001 Location: Sofia	Thanks jam. If there’s somebody interested I can send him (her) the Eagle files. It won’t be difficult to be rearranged to Aleph 2. But I don’t sell PCBs. So, no group orders. No orders at all. I just want comments. Especially comments that would show me mistakes or bring me improvements. I have better looking versions of the layout but this one is with the shortest signal paths. Regards

23rd November 2004, 03:21 PM	#8
Asen diyAudio Member Join Date: Jan 2001 Location: Sofia	mpmarino, The PCB is 13/9 cm. Sorry but where I live we don't use inches. Regards

3rd February 2005, 01:08 PM	#9
mpmarino diyAudio Member Join Date: Jun 2004 Location: Crunchville, where I don't fit in.	Asen, I have a question on your layout. You are showing a 1uf capacitor in parallel with Z5. I do not see this on Mr. Pass's schematic. What is it's purpose? I am probably missing something.... Thanks, Marc

3rd February 2005, 02:27 PM	#10
Stabist diyAudio Member Join Date: Sep 2002 Location: Slovenia	@mpmarino - I think a very good explanation is hidden in "10 ways how to improve Aleph" topic ...

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