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New DT50 212 Running Hot
by dprubinstein on 2012-02-18 14:43:15

Gentlemen:

I've got a virtually new (December 2011) DT50 212 that might  be running too hot.

Now I'm getting old and am a bit out of touch with tube amps, as it's been awhile, so you young whipper-snappers bear with me, but I'm smelling tube or rubber or something after playing for half an hour or so at modest volume, and I'm not sure I should be smelling anything.

I'm not cranking the thing up on stage or even in a garage; I'm using a spare room in our home and keep the volume to a dull roar for fear of my wife and neighbors.  It could just be the amp's newness burning off, or maybe its natural, or maybe its nothing.  I don't know, which is why I am writing this.  There's not a lot of ventilation behind the tubes in the DT50.  The amp's backing is practically right up against them.  And I've got the amp perhaps 6 inches from the wall.  The amp's backing gets extremely hot to the touch, too.  Is this right?  Standard tube amp stuff?

Also, I am running the DT50 with a POD HD500 via Link 6 hook up with a standard XLR cable, in case this makes a difference.  (Yep, the geezer's got a rig!)

Thanks for your assistance.

Signed:  David "Worried New Parent of DT50" Rubinstein



Re: New DT50 212 Running Hot
by sopachrga on 2012-02-18 23:46:00

Hmm, hard to know without being there.

My DT50 certainly does get hot to touch at the back. Not hot enough to burn, but very warm.

It might pay to have a look at the power amp tubes while it's running and making sure one of them isn't glowing substantially brighter than the other. If so, it could indicate a faulty tube.

Also make sure that you are plugging your speaker cab in to the correct ouput on your amp. e.g. 16 ohm cab -16 ohm output etc.

My amp is about 6 months old now, but I've never noticed it smelling, I use a Marshall power brake so tend to run the master volume at just over 50%.



Re: New DT50 212 Running Hot
by bartpuglise on 2012-02-19 15:29:12

I have a DT 50 head with a Avatar 2x12 cab and a Dr Z air brake. I still will sometimes get a slight smell if I'm cranking that bad boy. It does get hot and I think that's normal having owned a few other tube heads . If it is so hot that it burns you than I'd have a tech look at it or look to make sure the tubes are well seated. If and when you change tubes you'll get that new tube smell



Re: New DT50 212 Running Hot
by Kneehow on 2012-02-21 17:27:46

When I first play-tested a DT50, I remember a burning smell for the first weekend... I ran that amp for probably a total of 12 culmulative hours between a Friday evening, Saturday and Sunday.

After a week or two and especially by the first show, I've no longer noticed the burnt smell since.




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