strange noise from twin tube classic

[babatube]

hi all.:beerchug:
need help with a twin tube classic(SFX-03) strange noise.
i looked in the forum and google and couldn't find a similar problem.
the pedal was bought 2 months ago.

when using the lead channel and putting the volume a bit up i get this strange sort of repeated noise.

it's hard to describe.
it's not a hum or a buzz.
there is a sort of a low volume ring and a repeating noise in a constant intervals.
it's like the ac frequency but i'm not sure.
i tried 3 different cables and three different amps.
it happens in all of them
the phenomenon happens also when the guitar volume is down.
i noticed that when i cover the jack of the input cable with my hand the noise disappears.
also when i cover the effect the noise seems to get lower.
i contacted a week ago to Seymour Duncan customer support and got no reply till now.
please help!
can't really rock properly!!

i uploaded a sample of the noise:

http://rapidshare.com/files/429013756/sfx03weirdo.mp3

any ideas?

 

[babatube]

Re: strange noise from twin tube classic

bzzzz

 

[babatube]

Re: strange noise from twin tube classic

bump bump bump

thanks for non of your help all.
where are you all tech guru when needed?

the customer service haven't even bother replying.
looks like the last time i am buying SD gear:rant:

 

[frankfalbo]

Re: strange noise from twin tube classic

This is the first time I've seen this post, sorry I missed it the first time around. We're glad to help in any way we can, if you can give Customer Service a call today we'll be glad to take care of it.

 

[Funkfingers]

Re: strange noise from twin tube classic

Probably a microphonic valve (tube).

 

[babatube]

Re: strange noise from twin tube classic

This is the first time I've seen this post, sorry I missed it the first time around. We're glad to help in any way we can, if you can give Customer Service a call today we'll be glad to take care of it.

not living in the US.
what are your US office hours ?

Probably a microphonic valve (tube).

is there a way to test it to be sure?
also there are two valves inside of it how would i know which one.
it only happens in the lead channel.

 

[Funkfingers]

Re: strange noise from twin tube classic

is there a way to test it to be sure?
also there are two valves inside of it how would i know which one.
it only happens in the lead channel.

Visual inspection, tapping on the glass envelope, physical substitution.

On the SFX pedal, any of these actions will involve opening the casing. Doing this will almost certainly invalidate your waranty.

Even though the unwanted noise only occurs in the maximum gain mode, knowing this does not help much. Any one of the cascading gain stages could be the source of the noise. All gain stages after the bad one will boost the noise.

Follow Frank Falbo's advice. Contact SD.

 

[drpietrzak]

Re: strange noise from twin tube classic

I have had 2 of them go funky. One went to SD and they replaced it immediately. The other back to the store. One was a pot issue and the other a tube (I Think). My current one has been on my big board for 1.5 - 2 years or more now.