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Old 19th October 2005, 06:26 AM   #1
cadbike is offline cadbike  United States
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Default 41Hz Amp6



I'm making my first jump into diy audio and have decided to go with the 41hz amp6 kit. However, I was hoping to use a toroidal power supply on closeout at partsexpress. But they are sold out. Does anyone have any recommendations for an alternative. I do have several 12volt 7ah batteries lying around if someone has a schematic for how to modify an AMP6 to work with an sla. Thanks in advance!
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Old 19th October 2005, 07:29 AM   #2
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"Just add a transformer of 15V AC" it says. That should roughly be like 20-21VDC after the rectifiers. Dunno if AMP6 can take 24V but if it can just use like 6 pieces of your batteries to make 24V/21Ah and connect it after the rectifiers. I think...

Edit: Oops my bad... "LM1084 low dropout 5A voltage regulator set to 14.5V" ok, just add the batteries after the reg? as 12V batteries is like ~13.8V anyways. And parallell 'em to the wanted Ah.

Edit2: or buy the AMP3 if youre gonna use batteries? save $14
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Old 20th October 2005, 09:20 AM   #3
wadric is offline wadric  United States
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Cadbike,

I, too, burned out waiting for the cheap Parts Express Toroidals to be back in stock, so I ordered the 50VA Amveco toroidal from DigiKey number TE62083-ND for $18.83. It is 15V at 3.33A with secondaries paralleled.

I haven't finished building AMP6, but the power supply checks out with this and a dummy load. Also, it is small and "potted" so it is easy to install.
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Old 20th October 2005, 01:23 PM   #4
cadbike is offline cadbike  United States
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Just wanted to tell everyone thanks for their help and info.
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Old 8th January 2006, 03:17 AM   #5
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I'm currently finishing 3 AMP6 modules to be used in my active setup.
However I have spotted a problem when following the manual (V 1.0).

With the kit came 5 capacitors with the following specs: 0.1 uF RM 2.5 mm.

However for the amplifier 6 of these caps are needed: C16, C17, C20, C26, C50, C102.

Am I doing something wrong? The bag in which the caps came said that 5 caps where supplied, hence I don't think it was a simple mistake with packaging.
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Old 8th January 2006, 06:32 AM   #6
Electrons are yellow and more is better!
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Ninfendo, have noticed that Jan Fredriksson has his own support forum over at his website? Maybe you should ask him directly?

http://41hz.com/Forums/
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Old 8th January 2006, 06:43 AM   #7
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Both my Amp6s came with 6 0.1uF caps in bag #2.
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Old 8th January 2006, 10:04 AM   #8
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Quote:
Originally posted by pepolman
Both my Amp6s came with 6 0.1uF caps in bag #2.
Is that six 0.1 uF RM 2.5 mm you recieved?

In total I recieved 7 caps (5 * 0.1 uF RM 2.5 mm) and (2 * 0.1 uF RM 5.0 mm).

I have been trying to email Jan for the past week, however no response so far
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Old 8th January 2006, 10:19 AM   #9
Electrons are yellow and more is better!
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Jan mentions that he has some problems with espceially Yahoo. You could put the qeustion at his forum.

(Isn't it irritating when your plain emails are regarded as spam and the result is an empty email Why do people have Yahoo in the first place?)
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Old 8th January 2006, 04:30 PM   #10
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Jan just replied to my email, apparently there were a few kits sent out with the wrong amount of caps. He is now sending me a few additional ones.
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