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Old 30th November 2012, 03:25 AM   #21
dazed2 is offline dazed2  Canada
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Quote:
Originally Posted by Blink_PT View Post
Do not quite understand what she said!.

A scheme would be excellent. thank you
I don't have a pot on the input like yours but here is sort of what I did.
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File Type: jpg f5hum7b.JPG (30.1 KB, 178 views)
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Old 30th November 2012, 03:38 AM   #22
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Hi,
Attached it is ground schematic that I used when everything failed. Always worked. Before try it connect the chassis ground as close as possible to the PS ground. The distance sometime make a different.
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File Type: jpg star ground layout.jpg (216.6 KB, 194 views)
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Old 30th November 2012, 05:02 PM   #23
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Quote:
Originally Posted by omishra View Post
....................

Just for curiosity , does your preamp has zero resistance between grounds of both RCA?
hello,

Yes, all the pre RCAs have common mass.
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Old 30th November 2012, 05:35 PM   #24
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I'll be too perfectionist? Is it normal to hear this hum F5 to 20cm column?

I've tried everything, used a bridge rectifier on earth, and everything stays the same.

Click the image to open in full size.


In place of listening I do not hear the hum, but I fear that change the sound to get louder.

After the experiences I made some improvements and got the standard connections, and the little hum!!


Click the image to open in full size.


Click the image to open in full size.


When I bought the capacitors 15000UF came a pack of 10, only have 8 at the source, I wonder if it would have any benefit in putting these 2 that are on the shelf.

It could connect them at the entrance of PSU in parallel with R of 2.2 K! I had already asked this question but no answer. Thanks guys
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Old 30th November 2012, 06:54 PM   #25
AndrewT is offline AndrewT  Scotland
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Tauro,
DO NOT take the charging pulses onto the Main Audio Ground.
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Old 30th November 2012, 06:55 PM   #26
AndrewT is offline AndrewT  Scotland
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Blink,
where are your pics?
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Old 1st December 2012, 10:02 AM   #27
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Originally Posted by AndrewT View Post
Blink,
where are your pics?

the images are at the beginning

F5 - is normal ICs twist out the Hum?
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Old 1st December 2012, 11:13 AM   #28
AndrewT is offline AndrewT  Scotland
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I can't see any pics.
Not in post1, nor in the link you so kindly provided.

Did you remember to attach them?
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Old 1st December 2012, 01:32 PM   #29
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Quote:
Originally Posted by AndrewT View Post
I can't see any pics.
Not in post1, nor in the link you so kindly provided.

Did you remember to attach them?
Other members can see the images because they respond to questions.

They housed the Imageshack, you can not see the pics of ImageShack?

I'll put on my website for you, and say now you see ...

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.

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.


Now it is so.

Click the image to open in full size.

Click the image to open in full size.
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Old 1st December 2012, 04:47 PM   #30
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Quote:
Originally Posted by tauro0221 View Post
Hi,
Attached it is ground schematic that I used when everything failed. Always worked. Before try it connect the chassis ground as close as possible to the PS ground. The distance sometime make a different.
The GND of the right and left pcbs (R1 and R2) and R10 do not connect the GND PSU?

The negative speaker does not turn to the central point of the capacitors (0 Volts)?

The large currents flowing through the columns should not return to the center point of the capacitors?
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