Problem with a Twin Tube Classic

[DaveD]

Hello everyone. I have a twin tube classic that I use with my Blues Junior. The tone that I can get with this combination is awesome. However I am having a problem with the pedal. When on the rhythm channel I get what sounds like tube "ringing" and this happens when I'm not playing. If I tap the pedal with my pick I can hear this from the amp. This only seems to happen on the rhythm channel. The lead channel seems fine. Is this the tubes? Could this be the relays?

Any suggestions are appreciated.

 

[STRATDELUXER97]

Re: Problem with a Twin Tube Classic

Hello everyone. I have a twin tube classic that I use with my Blues Junior. The tone that I can get with this combination is awesome. However I am having a problem with the pedal. When on the rhythm channel I get what sounds like tube "ringing" and this happens when I'm not playing. If I tap the pedal with my pick I can hear this from the amp. This only seems to happen on the rhythm channel. The lead channel seems fine. Is this the tubes? Could this be the relays?

Any suggestions are appreciated.

Possible bad connection? Maybe see if Evan Skopp can chime in with a fix or an answer for ya? Does that pedal have a tube? If so the tube could be microphonic.

Welcome to the forum!

 

[DaveD]

Re: Problem with a Twin Tube Classic

It has two 6021 sub-miniature tubes that are supposed to be able to withstand severe shock, vibration and temperature conditions. I looked for bad connections and didn't see any. I have a schematic of the pedal and it looks like both tubes are used for both channels which makes me think it's a bad relay.

 

[STRATDELUXER97]

Re: Problem with a Twin Tube Classic

It has two 6021 sub-miniature tubes that are supposed to be able to withstand severe shock, vibration and temperature conditions. I looked for bad connections and didn't see any. I have a schematic of the pedal and it looks like both tubes are used for both channels which makes me think it's a bad relay.

Dave....call the guys at Seymour Duncan and ask them if they are familiar with the issue you're having...Their support group and techs are always helpful and nice...Can't hurt or like I said,maybe Evan will pop in for ya?

 

[J Moose]

Re: Problem with a Twin Tube Classic

Relays only affect switching... if a relay went bad the pedal would be stuck on a channel or in bypass. Could be some other component like resistor that's drifted out of value or could be entirely normal. If I tapped/kicked/pummeled my TT mayhem it had a "ring" noise that could be heard through the amp. They all do that to some degree since you basically have the preamp section of a tube amp stuffed into a stompbox. If you tap the chassis of a tube amp it makes noise too...

Can hear it while playing? Or only when your not playing?

 

[STRATDELUXER97]

Re: Problem with a Twin Tube Classic

Relays only affect switching... if a relay went bad the pedal would be stuck on a channel or in bypass. Could be some other component like resistor that's drifted out of value or could be entirely normal. If I tapped/kicked/pummeled my TT mayhem it had a "ring" noise that could be heard through the amp. They all do that to some degree since you basically have the preamp section of a tube amp stuffed into a stompbox. If you tap the chassis of a tube amp it makes noise too...

Can hear it while playing? Or only when your not playing?

He stated when he's not playing...

 

[DaveD]

Re: Problem with a Twin Tube Classic

It happens both when I'm playing and not playing. When I had the cover off, plugged in and turned on I can make the problem occur by very lightly tapping on the board or relay or other components. If I lightly tap the tubes it doesn't appear to cause the problem.

The relays are responsible for switching the signal path. I though maybe a weak coil or bad relay connection?!?

 

[STRATDELUXER97]

Re: Problem with a Twin Tube Classic

It happens both when I'm playing and not playing. When I had the cover off, plugged in and turned on I can make the problem occur by very lightly tapping on the board or relay or other components. If I lightly tap the tubes it doesn't appear to cause the problem.

The relays are responsible for switching the signal path. I though maybe a weak coil or bad relay connection?!?

Did you call the SD company yet? Seems you might be pissin in the wind..

 

[busser]

Re: Problem with a Twin Tube Classic

my twin tube classic make a lot of background noise?