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Old 15th February 2010, 07:30 PM   #1
Kanton is offline Kanton  Italy
diyAudio Member
Join Date: Feb 2010
Smile Electrocompaniet ECP-1

Has anybody got sone noise problem with an Electrocompaniet ECP-1 pre-phono?
My problem is an "hum noise" generated after about 30 minutes after the power-on.
Many Thanks for all suggestions and Help.
Best Regards
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Old 15th February 2010, 08:37 PM   #2
AMV8 is offline AMV8  United Kingdom
diyAudio Member
Join Date: Jan 2005
Location: near london
There are a few things that you can do to help and isolate the problem.
1)Is the hum present with or with out the cartridge connected - to check that it is not the cartridge since these are a common source of hum.
2)Is it on one or both channels
3)Is it possible to see if you have any hum with an alternative pre amplifier connected.
4)Check all mechanical connections and clean if possible. That is all the input and output wires.
5)Can you check if all earth connnections are connecting properly. Where these are soldered or bolted are they secure.
6) Does the hum increase with volume increases.
7)Does touching the turntable or cartridge or preamp alter the hum.
If you can check the above it should help isolate the problem.
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Old 27th February 2010, 07:35 AM   #3
Kanton is offline Kanton  Italy
diyAudio Member
Join Date: Feb 2010
Default Electrocompaniet ECP-1

Dear AMV8

Many Thanks
I solve the issue , It was an earth connection,
without the earth pole I avoidde the problems
Thanks again
Best Regards
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Old 27th February 2010, 07:38 AM   #4
Kanton is offline Kanton  Italy
diyAudio Member
Join Date: Feb 2010
Dear AMV8
Many Thanks.
I solve the issue, It was an earth connection loop,
I remove the earth pole from the ampli and I loose the noise.
Thanks again Best Regards
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