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Post subject: SuperChamp XD with Noise
Posted: Mon Jun 20, 2011 1:43 pm
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I have noticed a background noise/hiss, sundenly apearing in my SUPERCHAMP xd

There is hiss even with no guitar plugged into SCXD.

Could you help me

Thanks in advance.

ARnor


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Post subject: Re: SuperChamp XD with Noise
Posted: Mon Jun 20, 2011 3:18 pm
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1 - Check your ground connection on the wall AC.
2 - Start swapping tubes, buy some cheap but good 12AX7 to see if it makes a difference. I would recommend you TungSol 12AX7.


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Post subject: Re: SuperChamp XD with Noise
Posted: Mon Jun 20, 2011 5:57 pm
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You get "good" tubes or you get "cheap" tubes.

Only seldomly do those parameters ever intersect.

Arjay

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Post subject: Re: SuperChamp XD with Noise
Posted: Sat Aug 20, 2011 4:01 am
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Ok. but what parameters could interfere?


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Post subject: Re: SuperChamp XD with Noise
Posted: Sat Aug 20, 2011 5:49 am
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Make it simply: noise (as white noise) can be caused by a valve (but also by a lot of other components). Change valve V1 by a 12ax7 reputed good one. For power valves, I never experienced noise, but I don't know. If you don't find the rootcause, I recommand to contact a good tech because this amp integrates signal processing circuits.

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Last edited by Tis-san on Sat Aug 20, 2011 6:04 am, edited 1 time in total.

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Post subject: Re: SuperChamp XD with Noise
Posted: Sat Aug 20, 2011 6:03 am
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Ok. Thanks! But what brand of tube would you suggest?
tungsol, sovtek, JJ? Which is the best?


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Post subject: Re: SuperChamp XD with Noise
Posted: Sat Aug 20, 2011 6:14 am
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There is no best one (excepted telefunken ECC83 - joking :lol: ), just your ear is the judge. JJ is a good choice, GT also, I've almost 10 different brands, today I use 2 SPAX7 Mesaboogie as V1 and 2 and a 12ax7 "balanced JJ" for PI, Sovteck for power on my BDlx.

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*'52 Telecaster RI, '57 Stratocaster RI, Gibson ES175 RI, Washburn Hawk 1980, Epiphone Casino MIK 2000, 57' Deluxe Knotty Alder, BDRI ...*
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Post subject: Re: SuperChamp XD with Noise
Posted: Wed Sep 07, 2011 2:59 pm
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I replaced all tubes to tungsol 12AX7 and JJ 6v6..

There was a diode burnt, that was replaced also. And the great sound got back. .

I think the sound became cleaner and powerfull as a whole...

SCXD is a great amp.... Do you agree folks? :-)

ARnor


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Post subject: Re: SuperChamp XD with Noise
Posted: Wed Sep 07, 2011 3:04 pm
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What do I have to do and avoid to keep SCXD with this great sound?

Carry the amp carefully is a must. But, for instance, do I need to avoid some pedals with high output (consequently with high input in the amp), like some distortions pedals?

Thanks a lot,

ARnor


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