Orban 622b eq needs love

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skal1

Well-known member
Joined
Jun 4, 2008
Messages
1,282
Location
Birmingham,uk
Ok lads

need some help with this problem guys . Their seems to be a 100hz noise when i engage any of the freq bands on the eq  this noise is not present when the filters are not engage.

I think the power supply circuit is ok  as the noise is not present in the input gain amp.


Any help and pointers would be appreciated.

cheers

skal1
 
Is this a box new to you, or something that has been working fine that recently developed the hum?

Is the hum on both sides, when either side filter engaged, or only on the engaged side?

An EQ is just one malfunctioning component away from potentially being an oscillator, as any Trident 80 series tech can soundly attest.
Mike

 
sodderboy said:
Is this a box new to you, or something that has been working fine that recently developed the hum?

new to me brought off a member on here.

sodderboy said:
Is the hum on both sides, when either side filter engaged, or only on the engaged side?

only on the engaged side

cheers

skal1
 

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