Dsl Bad!!??

[y2stevo]

hey im having slight trouble with my dsl...i dunno whats wrong with it but just recently (last few hours) my dsl 50 when i was playing it just started buzzing like hell!!, now this only so far happened 3 or so times because i kinda just left it turned off for about an hour after that, then came back bout 10mins ago then turned it on on the clean channel, and buzzing like hell again, then i just switched the channel to overdrive then it went away, the first time i done the same and it went away and the second time which was like 2 mins after the first it went away when i turned on the chorus pedal then it went too..... what the hell is wrong with my amp?????i dont want this happening when im playing or something...

Please help thanks...

 

[y2stevo]

Re: Dsl Bad!!??

Oh and also its not the guitar because first i tried turning down the vol on guitar and didnt go away then tried pullin gout the jack from the guitar and it was still there, only thing that worked was i changed the channel... thanks..

 

[That90'sGuy]

Re: Dsl Bad!!??

Maybe something on the amp came loose and isn't properly grounded? I'd say tubes, but you said you switched channels and it went away for a second.

 

[y2stevo]

Re: Dsl Bad!!??

well it went away for more than a second, im just messin with it now and i think ur roight bout tubes but i think it cud be that they overheated mabye, i dunno if thats the symptoms of overheating, but i hd the actual head sown on the floor near the amp cos i was afraid of someone walkin in and knockin it over cos its near the door and cus easily be done so, so mabye thats why, i have the head on the amp now facing the other way and with the back grille open and just movin my hand near em those tubes get mighty hot... any other suggestions cos mabye thats not why, much appriciated....

 

[mrid]

Re: Dsl Bad!!??

power tubes...did you buy this new or used? How long have you had it?

 

[y2stevo]

Re: Dsl Bad!!??

new and about 2 months mabye.. have you had this happen before..?? and could it be the overheating, ive heard of the dsl401 comboo overheating issue but never a dsl50 head..??

 

[mrid]

Re: Dsl Bad!!??

new and about 2 months mabye.. have you had this happen before..??

Yes I have...it was a bad power tube. Tap each power tube with the eraser end of a pencil to find the culprit (It'll crackle).

 

[y2stevo]

Re: Dsl Bad!!??

well i did that, although i used an actuall eraser because i didnt have any eraser tipped pencils, and nothing seemed to be out of the ordinary, all i heard was the sound of the parts vibrating slightly but nothing like a crakle,, when u mean crakle do u mean kinda like a light bulb when its finished because there was none of that.... right now this buzzing or droning hasn't happened again ....yet, so i dunno whats goin on... thanks alot,..

 

[BombsAwayJ]

Re: Dsl Bad!!??

Hm not quite sure but it hasn't happened to me and I bought mine used off Ebay. I have no clue but would there a preamp tube dedicated more towards the clean channel that would do this?

 

[mrid]

Re: Dsl Bad!!??

If it's just the clean channel, check the V1 preamp tube.

 

[y2stevo]

Re: Dsl Bad!!??

no it was on both channels...

and whats v1 and v2 and all these mean, is it the position in the chain of the tubes?
and also whast the deal with the piese of metal with a spring on it attached to one of the pre tubes on the dsl50.. just curious ....

thanks alot..

 

[mrid]

Re: Dsl Bad!!??

and also whast the deal with the piese of metal with a spring on it attached to one of the pre tubes on the dsl50.. just curious ....

That's what I'm talking about...V1 with the metal shield on it.

 

[y2stevo]

Re: Dsl Bad!!??

and whats the reason for this, to shield it?


does anyone else have suggestions...

thanks alot...

 

[Gearjoneser]

Re: Dsl Bad!!??

Troubleshoot in this order.

Use the amp on a different outlet.
Try a different guitar.
Try a different guitar cord.
Try a different footswitch cord. Sometimes this noise is caused by a faulty footswitch cable or the switching relay inside.

If you have different pre tubes, put those in (from another amp?)
If not, swap the first and 3rd pre tube. See if anything changes.

If the tubes are older than 1 1/2 years, change them all. Biasing that amp is pretty easy, if you have a voltmeter and know the voltage value suggested by Marshall. The bias points are on the back of the chassis.

If the problem is still intermittent after all this, take the chassis out, and check all the wiring harnesses that go to the circuit board. Unplug and replug them. J from Houston's dead DSL was fixed this way.

If the hum still won't go away, have a tech look at it, since it would probably be a bad capacitor or footswitch relay. TSL's are plagued with footswitch problems. DSL's aren't really, but it's a possibility.

 

[y2stevo]

Re: Dsl Bad!!??

Well if its anything i would think its not the guitar or anything but mabye the tubes because when i switched on chorus pedal the sound went away... and tubes are only about 2 months or so old as well as the amp...

Thanks alot and ill try these ....

 

[y2stevo]

Re: Dsl Bad!!??

Ok good news, turns out it was the chorus pedal that was causing the problem,i think it could have been a dirty switch buyt it doesnt seem to be bothering me anymore,

Thanks,.,

 

[strat_master]

Re: Dsl Bad!!??

THAT happend to my crappy marshall ten wayy practice amp. Its a ss of course but once in a while it will buzz like crazy exactly as you described it