Mini Aleph Questions

audioboy · 2nd September 2007, 11:24 PM

Hi, I have a few 12.6V Hammond transformers lying around (this one http://www.alliedelec.com/Search/Pro...&tab=specs#tab ). Would these be suitable in making Mini Alephs? And I don't know how to make the power supply section. Does anyone have the schematics for them? Any help would be appreciated

vdi_nenna · 3rd September 2007, 02:16 AM

The current is a bit low, but if you use the mini-a schematic as is, it might be just enough. The mini-a as is runs around 1 amp. Use 1 transfo for each channel.

Here's a very helpful site for beginners.

http://sound.westhost.com/psu-wiring.htm

jleaman · 3rd September 2007, 02:47 AM

This should work, but like vdi_nenna said, id use one per channel.

traw · 3rd September 2007, 03:24 AM

actually looks like 2 per channel, 4 total, since each is 12.6. one per rail per channel. if tried just 2 at one per rail, would take a beating and likely sag down to 12-13 volts.

Dennis Hui · 3rd September 2007, 03:31 AM

Hi,

The voltage looks low. The 12.6 V centre-tapped
transformer will give you around +/- 8VDC rails. This
is too low for an Aleph.

What you can try is to discard the centre tap and use
two transformers to generate the +/- rails. That
should get you around +/- 16V DC.

The current capacity of the transformers isn't that high
so you may find that running two channels off this
one pair of transformers will cause the transformers
to get too hot. If that's the case, you can use another
pair for the second channel.

Cheers,
Dennis

jleaman · 3rd September 2007, 05:07 AM

I think we are all just sayin, buy a 30$ transformer off ebay and play it safe

audioboy · 3rd September 2007, 03:02 PM

Alright, thanks for the replies. I think I'm better off buying transformers that are more suitable. Thanks again!

2nd September 2007, 11:24 PM	#1
audioboy diyAudio Member Join Date: Aug 2006	Mini Aleph Questions Hi, I have a few 12.6V Hammond transformers lying around (this one http://www.alliedelec.com/Search/Pro...&tab=specs#tab ). Would these be suitable in making Mini Alephs? And I don't know how to make the power supply section. Does anyone have the schematics for them? Any help would be appreciated

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3rd September 2007, 02:16 AM	#2
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	The current is a bit low, but if you use the mini-a schematic as is, it might be just enough. The mini-a as is runs around 1 amp. Use 1 transfo for each channel. Here's a very helpful site for beginners. http://sound.westhost.com/psu-wiring.htm

3rd September 2007, 02:47 AM	#3
jleaman Banned Join Date: Apr 2002	This should work, but like vdi_nenna said, id use one per channel.

3rd September 2007, 03:24 AM	#4
traw diyAudio Member Join Date: Sep 2005	actually looks like 2 per channel, 4 total, since each is 12.6. one per rail per channel. if tried just 2 at one per rail, would take a beating and likely sag down to 12-13 volts.

3rd September 2007, 03:31 AM	#5
Dennis Hui diyAudio Member Join Date: Aug 2002 Location: Toronto, Canada	Hi, The voltage looks low. The 12.6 V centre-tapped transformer will give you around +/- 8VDC rails. This is too low for an Aleph. What you can try is to discard the centre tap and use two transformers to generate the +/- rails. That should get you around +/- 16V DC. The current capacity of the transformers isn't that high so you may find that running two channels off this one pair of transformers will cause the transformers to get too hot. If that's the case, you can use another pair for the second channel. Cheers, Dennis

3rd September 2007, 05:07 AM	#6
jleaman Banned Join Date: Apr 2002	I think we are all just sayin, buy a 30$ transformer off ebay and play it safe

3rd September 2007, 03:02 PM	#7
audioboy diyAudio Member Join Date: Aug 2006	Alright, thanks for the replies. I think I'm better off buying transformers that are more suitable. Thanks again!

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