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Chip Amps Amplifiers based on integrated circuits

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Old 11th February 2011, 12:41 AM   #1
JonGain is offline JonGain  United States
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Default will this work?

Assuming it puts out the correct voltage should I scrap all the regulated circuit & just use the rectifiers or is there a way to make it work as is?
It is a Power supply board from a mid 80's Realistic integrated amp.

How can I figure out what to hook up where? it looked like the Red & Blue wires were used as power?

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Old 11th February 2011, 12:48 AM   #2
6L6 is offline 6L6  United States
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Is there any information on the board where various wires hook up?

Specifically near the brown/blue that go to the transformer and also the black/red/orange that go to the transformer.

Also what does it say near the red/blue?

Could you take a photo of the bottom of the board?
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Old 11th February 2011, 12:53 AM   #3
JonGain is offline JonGain  United States
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it just states pin numbers at those locations, however the smaller wires at the front have labels but they are for powering other boards that were in the amp.....tuner display etc.....
I'll take a picture of the bottom.
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Old 11th February 2011, 12:55 AM   #4
6L6 is offline 6L6  United States
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Does it still have the mains plug attached? Could you plug it in and take some readings?
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Old 11th February 2011, 12:59 AM   #5
JonGain is offline JonGain  United States
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I could, it is set up on a temp set up, I am uploading some more pics now.....I am a rookie but have some basic knowledge
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Old 11th February 2011, 01:03 AM   #6
JonGain is offline JonGain  United States
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Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
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Old 11th February 2011, 01:21 AM   #7
6L6 is offline 6L6  United States
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Are there any more wires into the transformer other than the red/orange/black/orange/red and the dual blue/brown?
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Old 11th February 2011, 01:26 AM   #8
JonGain is offline JonGain  United States
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Quote:
Originally Posted by 6L6 View Post
Are there any more wires into the transformer other than the red/orange/black/orange/red and the dual blue/brown?
Yes the AC orange & white can't see it in the pic....
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Old 11th February 2011, 01:37 AM   #9
6L6 is offline 6L6  United States
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Ok, that helps... I was trying to figure just what in sam hill the primary was doing connected to the board. (I thought the primary was the brown/blue)

Before plugging it in, determine continuity of the secondary windings - for instance are the two browns a winding, or is it a blue and a brown?

Plug it in, and then get voltage readings on all the secondary wires. Be careful - electricity can be harmful or fatal! (This message brought to you by Lawyers...)

Once we know what the voltages are we can determine if it's appropriate for a chipamp.

BTW, do you have any project in mind?
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Old 11th February 2011, 01:40 AM   #10
JonGain is offline JonGain  United States
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Quote:
Originally Posted by 6L6 View Post
Ok, that helps... I was trying to figure just what in sam hill the primary was doing connected to the board. (I thought the primary was the brown/blue)

Before plugging it in, determine continuity of the secondary windings - for instance are the two browns a winding, or is it a blue and a brown?

Plug it in, and then get voltage readings on all the secondary wires. Be careful - electricity can be harmful or fatal! (This message brought to you by Lawyers...)

Once we know what the voltages are we can determine if it's appropriate for a chipamp.

BTW, do you have any project in mind?
I'm building a LM3875
I may wait till tomorrow for readings, it's getting late here in the east
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