[sdiy] Buzzing reverb

[Steve Begin]

I don't think it's EMI since I've tried it in another room where there 
should be very little.

I'll do some snooping around the reverb tank then, thanks for the help guys!

-steve

----- Original Message ----- 
From: "harrybissell" <harrybissell at prodigy.net>
To: <jays at aracnet.com>
Cc: "synth" <synth-diy at dropmix.xs4all.nl>
Sent: Friday, April 15, 2005 8:18 PM
Subject: Re: [sdiy] Buzzing reverb


> oooh... my bad
>
> I missed a clue.  If the Parametric EQ works without hum, but he reverb
> DOES hum... its is very likely NOT a cap in the power supply !!!  Broken
> wire, or EMI.  Or it could be a bad connection at, or insdie the reverb
> tank itself. They usually use RCA connectors, famous for having corrosion
> etc...
>
> H^) harry
>
> jays at aracnet.com wrote:
>
>> You haven't moved it next to something that has a lot of EMI have you?
>>
>> Reverbs are great for picking up AC hum from computer monitors and other 
>> units power supplies.
>>
>> Like Harry said, either bad caps or bad ground would be my guess after 
>> EMI. Usually linear power supplies aren't that bad to deal with.
>>
>> Jay S.
>>
>> Steve Begin wrote:
>>
>> > I have an Intersound PRV-1 Spring Reverb / Parametric EQ, and when the 
>> > reve=
>> > rb section is switched on, there's a really loud buzzing sound added to 
>> > the=
>> >  output.
>> > It does this regardless of whether or not there's an input present, and 
>> > the=
>> >  buzz would appear to be 60Hz.
>> >
>> > Would this mean it's likely one of the filter caps somewhere is dead? 
>> > If s=
>> > o is there anything anybody can tell me about how I should go about 
>> > locatin=
>> > g the offending capacitor?
>> >
>> > Thanks,
>> > Steve=
>
>