Thank you very much!! You have been very helpful. Due to work, I do not think I will have spare time in the next few weeks but then I promise I will document all of the process. Bye!!

Thank you very much one more time!!

I took a lead and plugged it into the Line In and Line Out and all seemed to be ok, but when I took it off the Line In then the sound went intermitent and scratchy for a while. Then no sound. Plugged again, all ok, took off again and the intermittency. So it seems to be there, into the Line In connector.

I also knocked near the Line In connector while it was sounding (with the cable removed) and seemed to afect the intermittency but it was very subtle.

Besides of that, the clean volume pot, the lead gain pot and the general master pot feel loose, and the clean volume is also scratchy.

Now It works.... ??

Quote from: Roly on March 16, 2013, 01:25:44 AM
Dirty contact somewhere.  The most common cause are the bypass switch contacts in the Fx Send and Return sockets, then the headphone socket.

Generally clean all your plugs and sockets, starting from the guitar, with a few drops of metho or contact cleaner, and "work" by plugging in/out a few times.  Occasionally they won't clean up and require replacement with new.

Second chance, dirty control pots, ditto.

Third chance, particularly with PCB mounted sockets, is a fractured solder joint where they mount - resolder.

HTH

Thank you very much Roly!

Today the story was a bit different, I started playing normally without any volume problems, to the point I meant to post here that the problem was solved, but suddenly, after at least 30 min of playing, the volume went out...

So maybe is a matter of overheating??.... I am going to turn on the amp in an hour or two to see if it sounds again...

Hi folks!

I am replying this old topic because I am starting to have problems with the amp. I did not used it since last week and when I plugged my strat this afternoon suddenly volume goes down and back up and then no volume. I was playing at bedroom volume is that matters. And this was first at the lead channel, but then at the clean channel too. I turn the amp off, then turn on again and the problem persists. It is like a general volume drop.. but when you push the master up then the volume goes up  and finally goes down again...

If you guys have any idea of what is the cause of this problem it will be very appreciated..

Finally I am going to desist, you are right guys, I´ve been cleaning as much as I could with a brush and to refinish it surely won´t worth the effort because I am only use the amp at home. The clean volume pot scratch a little also but there is not a big problem. At home I can really turn volume up a lot so I could live with it.

And any of you guys have the schem of this amp.. I have some kind of curiosity about the design. Maybe someone could send it to me in a private message.

I have an electronics engineering degree and as a hobby I have just started messing around some schemes in NI Multisim, that if you do not are used to, I encourage to use this powerful design tool.

Yea, in the photos it does not seem look that bad, but it is cause of the flash light of the camera, it makes the carpet covering looks almost like new, but the fact is there are large zones of the surface over painted,   like when you have a gum in your hair, if you permit me that analogy,  and that´s pretty awful. But like you said, there is not a fancy boutique amp, so probably does not deserve so much effort.

I was planning to using something like that http://www.amazon.com/3M-Hookit-9173NA-5-Inch-Reusable/dp/B00004Z4E0/ref=sr_1_1?s=hi&ie=UTF8&qid=1335457816&sr=1-1, and remove completely the cover, but I am going to try removing the paint with a hard brush instead.

In photos does not reflect, but all the knobs except two are blended or chipped. So I have to find a source of 8 cheap aluminum/plastic Marshallish knobs for sure.

It is only I enjoy with things looking good around my room, actually I did want that amp for home practice, but I am understanding by now that you have to turn up the volume a little bit to get better sounds of it.

What is your consideration of this H&K series, have you try/owned any of them? I have an ATS60 under the radar but this pop up surprisingly cheap so I could not pass on it.

OK, i could pass on that, but i really want to gave this old puppy a new fancy look. I really have no idea where to find a carpet-like covering or how cheap it would be so its for that i said about refinishing in natural (maybe tainted) wood.
The knobs are like the silver Marshall styled knobs. Any online store recommendation?

Hi folks!!

I am just bought a second hand Hughes & Kettner ATTAX 40 first edition, the one with the blue carpet cover..

I just have my first test and the amp is in good sound condition but in very poor aesthetic condition. There is only one pot (the reverb one) that is tight when spin, and all of them are loose. Anyway, the amp sounds good
without any weird noises or pot scratches. I´m going to change the buttons but i´m not sure if to change the pots because they seem to work properly but they seem may last not so long too.

I am thinking to put the sanding machine on duty and remove the carpet cover, and then apply some kind of wood protective lacquer to the cabinet. Any suggestions?

thanks for the support!

I just suppose capacitors must be changed nowadays, i thought that they last 10/15 years so maybe a general service won't be wrong

I've emailed Trace and they said that they lost their database and cannot say how old is my amp

but i keep your advices and won't touch the amp, maybe a cheap tube swap because current it's relabeled sovtek but anithing else

thanks

Hi!

I've recently purchased a second hand Trace Elliot SuperTramp tube guitar amp, and although it sounds fine, due to this age it maybe requires a service to improve the overall status;

According with Trace staff the amp is from late 90's so it's going to do 10 years old already,  I'm going to change the Ecc83 preamp tube and my question is if i should do change electrolytic capacitors too, i suppose that power ac filtrate and some others ...

What would you do? Maybe a photo will help to show the amp guts condition? it seems fine, like new to my eyes ...

Best Regards