DSL100HR making cooking noises.

Ramo

Ramo

AmTHRASHador of Chugz
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Georgia
Dose anyone know what can cause this?

I dont want to hear (they are made overseas cheap bla bla) … this amp has been good to me… ive giged across Uk and never let me down.

Maybe time to change valves?

Thanks for your input
 
Ramo said:
Dose anyone know what can cause this?

I dont want to hear (they are made overseas cheap bla bla) … this amp has been good to me… ive giged across Uk and never let me down.

Maybe time to change valves?

Thanks for your input
Click to expand...
Unplug the guitar cable turn up the volume controls
does it still make noises?

Plug a guitar cable between send and return. does it still make the same noises?

Take out the first preamp tube
the tube which is closest to the input jack.
Now turn it back on same as before.
Does it still make the noises?
 
Sound is back now ….

I have plugged directly into amp when it was doing that but nothing….

Ive turned it on/off few times and sound came back.

I have not gone inside as i dont know what im doing or what to look for.
 
This might be opening a Pandora’s Box…:

Was your amp thoroughly inspected?

Did the tube fail on its own because of age and use? Sometimes it’s necessary to replace the screen grid resistor that is tied directly to the failed power tube.

What’s the condition and age of the other three power tubes?

If you purchase only one EL34, how close will it match the other three in transconductance and the biasing of its current? The specs can be within a 10% margin.

Can you afford a replacement of all four power tubes?

If the amp’s phase inverter tube is also an old tube, this would be a good time to replace it too. The phase inverter tube is the hardest working tube in the circuit.

You can always keep the replaced tubes as spares and/or backups.

Your Marshall-branded EL34 looks like a JJ tube. Buy your tubes from a trusted vendor that does full comprehensive testing of the tubes you’re about to buy.

Good luck, Ramo… :fingersx:
 
syscokid said:
This might be opening a Pandora’s Box…:

Was your amp thoroughly inspected?

Did the tube fail on its own because of age and use? Sometimes it’s necessary to replace the screen grid resistor that is tied directly to the failed power tube.

What’s the condition and age of the other three power tubes?

If you purchase only one EL34, how close will it match the other three in transconductance and the biasing of its current? The specs can be within a 10% margin.

Can you afford a replacement of all four power tubes?

If the amp’s phase inverter tube is also an old tube, this would be a good time to replace it too. The phase inverter tube is the hardest working tube in the circuit.

You can always keep the replaced tubes as spares and/or backups.

Your Marshall-branded EL34 looks like a JJ tube. Buy your tubes from a trusted vendor that does full comprehensive testing of the tubes you’re about to buy.

Good luck, Ramo… :fingersx:
Click to expand...
Hey man thanks for your input.

I dont know how well he inspect it but I trust him. Last time he had he did say one of the valves was doggy.

Tube failed due to age, Ive had this amp 5+ years and its been working hard.

If the amp’s phase inverter tube is also an old tube, this would be a good time to replace it too. The phase inverter tube is the hardest working tube in the circuit.

^^^ I dont know whats that.

Im planning to replace all 4 at the same time. Vendor im buying it from they are reputable company and I think they are biggest tube suppliers in Uk.

They recommended me Svetlana tube…. I had downstairs neighbour called Svetlana and now have her in my amp? Mind blowing…..

Im keeping old ones as spare just in case…

I post link below one they recommended and one im thinking to get.

Thats their recommendation

EL34-SVETLANA REFLECTOR

These are reissue Svetlana EL34 Reflector made at Xpo-Pul factory also known as Reflector in Saratov, Russia. This Reflector made Svetlana EL34 is a faithful re-issue of the original design and construction of the famous winged C EL34. The Winged C Svetlana was the HI Fi EL34 of choice and...
www.watfordvalves.com

And thats mine

EL34-ELECTRO HARMONIX SINGLE

In description it says metal so it must be good hehehehe

And it had emoji sticker. :)
 
Ramo said:
Hey man thanks for your input.

I dont know how well he inspect it but I trust him. Last time he had he did say one of the valves was doggy.

Tube failed due to age, Ive had this amp 5+ years and its been working hard.

Im planning to replace all 4 at the same time. Vendor im buying it from they are reputable company and I think they are biggest tube suppliers in Uk.

Im keeping old ones as spare just in case…

I post link below one they recommended and one im thinking to get.

Thats their recommendation
Click to expand...
Welcome! Looks like you got a good plan.

Ramo said:
The phase inverter tube is the hardest working tube in the circuit.

^^^ I dont know whats that.
Click to expand...
On your amp, it's the V4 tube position on your amp:
marshall-dsl100h-2541851.jpeg

Ramo said:
They recommended me Svetlana tube…. I had downstairs neighbour called Svetlana and now have her in my amp? Mind blowing…..
Click to expand...
Is she hot?
 
Im buying quad matched set …. That dwarf tube ill replace next time….

Now l, just want to to get amp up and running..

Taking my jcm2000 for Fri/Sat/Sun gig…. Im driving miles away and Im hoping it wont crap out on me…

Im on mini tour going to Birmingham then Derby and last show at home down south.

Last time I cranked that up it blew the fuse :X3:

I hope it does not happen now :ohno:
 
Ramo said:
Hey man thanks for your input.

I dont know how well he inspect it but I trust him. Last time he had he did say one of the valves was doggy.

Tube failed due to age, Ive had this amp 5+ years and its been working hard.

If the amp’s phase inverter tube is also an old tube, this would be a good time to replace it too. The phase inverter tube is the hardest working tube in the circuit.

^^^ I dont know whats that.

Im planning to replace all 4 at the same time. Vendor im buying it from they are reputable company and I think they are biggest tube suppliers in Uk.

They recommended me Svetlana tube…. I had downstairs neighbour called Svetlana and now have her in my amp? Mind blowing…..

Im keeping old ones as spare just in case…

I post link below one they recommended and one im thinking to get.

Thats their recommendation

EL34-SVETLANA REFLECTOR

These are reissue Svetlana EL34 Reflector made at Xpo-Pul factory also known as Reflector in Saratov, Russia. This Reflector made Svetlana EL34 is a faithful re-issue of the original design and construction of the famous winged C EL34. The Winged C Svetlana was the HI Fi EL34 of choice and...
www.watfordvalves.com

And thats mine

EL34-ELECTRO HARMONIX SINGLE

In description it says metal so it must be good hehehehe

And it had emoji sticker. :)
Click to expand...
Svetlana is probably the best ones out there.
Damn shame they stopped production.

I'm wondering now if the new DSL is going to go bad like the old one did.

You know there is a test to check the board before you put new tubes in.
I would highly recommend you do this test to avoid frying any more output tubes.
 
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