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Old 19th August 2010, 10:01 PM   #1911
Salas is offline Salas  Greece
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Could it had gremlins produced by turning, going back to the common transformer? Its now the most royal powered fan ever it seems, anyway.
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Old 19th August 2010, 10:08 PM   #1912
Malka07 is offline Malka07  England
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Quote:
Originally Posted by Salas View Post
Could it had gremlins produced by turning, going back to the common transformer? Its now the most royal powered fan ever it seems, anyway.
Yes this Fan should be very Happy...as i am with the sound!!!

Thats what i thought Salas...because the tranformer is shared...and now the gremlins have been cleaned up???

Anyway im HAPPY
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Old 19th August 2010, 10:24 PM   #1913
Salas is offline Salas  Greece
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There is a CCS between the fan and the outer loop plus there is much more current shunted than drawn by it to care much of what its motor does. There is improved isolation for sure.
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Old 20th August 2010, 04:47 PM   #1914
Malka07 is offline Malka07  England
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Today, ive been trying to sort out my ground loop problem...i previously fixed this, by lifting the earth from the chassis, but this was only meant to be a temporary fix. So today after trying numerous things, i found that disconnecting the input grounds from the optivol board, got rid of the loud hum...however when i put my ears up to the speakers i can still hear some buzz from the tweeters and some hum from the woofers (not loud...quiet, but still there) I also got this level of buzz and hum, when the earth was lifted. So there appears to be another problem?? I tried switching the preamp and poweramp on while the cd player was connected but off...and also when the cd player was disconnected...but both times the hum and buzz was still there.
Does anyone have an idea, as to what i can try next?

Thanks

Alon
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Old 20th August 2010, 05:26 PM   #1915
Salas is offline Salas  Greece
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Turn your toroid a bit, does it change anything? If the lift works best in your system, keep it lifted and address security with a pair of yin yang diodes.
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Old 20th August 2010, 05:28 PM   #1916
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And pictures could help a lot too....
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Old 20th August 2010, 06:48 PM   #1917
Malka07 is offline Malka07  England
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Thanks Salas, i will give that a go...and let you know how it goes.

Woodturner-fran i have some pics on Page 190 Post #1899

Alon
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Old 20th August 2010, 06:51 PM   #1918
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I've used a CL60 before here, from earth ground to DCB1 ground plane. No problems. Lifted it can hum with certain stuff connected to it.
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Old 20th August 2010, 07:34 PM   #1919
Malka07 is offline Malka07  England
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Thanks Teabag, i have attached a pic, can you tell me which is correct please.

Click the image to open in full size.

Also if i attach the CL60 should i reconnect the input signal earths???

Thanks

Alon
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Old 20th August 2010, 07:57 PM   #1920
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either side of that yellow would be good I think.
I don't know about the opt-vol, but all my signal grounds go to j1 ground jumperwire. One side of CL-60 to that, other to side that attaches to chassis,and earth ground.
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