Haven't been able to find a source that offers suggsestions on replacement tubes for the DSL20C. I'd like to have a couple sets of backup tubes and if someone has any info on sound/effect of a particular tube or tube set that would help. The youtube videos I've found only mention groove tubes which I believe the concensus was that those tubes darken the sound. Any more info on those or other similar tubes would be of great help.

The Marshall CS JTM 1 carries a tube/valve complement of two ECC83/12AX7 in the preamp and one ECC82 in the power section. Once the tubes have been removed for replacement, how does one tell which tubes go back into which sockets? The pin outs allow for any of the tubes to go back into any of the sockets. I can't seem to find a PDF of the ower's manual either. Is there somewhere on line that Marshall or another source provides this PDF? Thank you for any  help in advance. 

Hello. I bought Marshall DSL40 CR from the local dealer (BON STUDIO- Greece) in 2019. Since the first time that I turned it on, I noticed that the amp makes aweird scratching soun when I'm using High Output. I 've contacted the dealer and he told me that it is normal and the amp is doing a format. I accepted this information and I was using the amp like this. I still have the scratcing sound for 10 minutes, every time that I'm using High Output.

A week ago I desided to check the tubes and the BIAS and I found 11mA at the first EL34 and 17,5mA at the second. I'm trying to adjust them and increase them at 35mA but the trimmer stops when I reach at 20mA. I'm trying to understand what is the problem. Is it normal?

Thank you in advance

Cheers!  I bought this beat up 100 Watt Marshall Tube Amp back in the 70's.  I think it was 1972 but life was a bit of a blur in those days.  The cover was so torn up, i removed it and stained the wood to give it a bit of character.  Last time I fired it up it worked fine.  The fan is loud but it did the trick.  The fan appears to have been replaced.  I was an aspiring bassist thru high school and early college but got in a motorcyclye accident which put an end to that dream.  I won't go into the details but my fret hand had to be pinned together.  Regardless, I am retired now and would like to get back into playing.  I was wondering if you could tell me a bit about this amp?  I've attached a few pics for your enjoyment.  I'm moving and will fire it up again once i get relocated.  Thank you for your time.

Last week a thunderstorm rolled through while I was away for work and lightning struck my home and caused some damage to various electrical components in the home. My Marshall tube amp was plugged in to a wall socket. The amplifier will turn on but there is low volume and the drive channel won't switch off and there is no distortion either. Is this something where I can take it to a local Marshall retailer and have it shipped for repair or do I need to find a local repairman?
Thanks! 
Dennis

Edit: Replaced the tubes. Still cut out or no sound at all when taken off standby. Check the fuses. They look brnd new. Bypassed the FX Loop and it seemed to work fine foa  day then went right back to cutting outor no sound when taken off standby. 

Full discalimer I don't have a lot of experience with tube amps.  Not many tech options to take it to where I live. I recently bought a used DSL20C and it is in imaculate condition.  Still has the tag on it. For the first few days it worked perfectly as expected.  I turned it on this weekend and let it warm up for a couple of minute, plugged my guitar, flipped off standby  and no sound.  Not even the usual hum that let's you know it's on.  I tried different guitars and cables. I confirmed and visible conections. Eventually, after switching the standby switch a few times it did eventually make sound. There were some pops and volume changes but it worked. I didn't press my luck and turned it off.  I took the back off and made sure the tubes were still seated properly (it was shipped to me).

This is the first time I used it with the speaker instead of the emulated line out. I really had to crank the volume to get good volume in my headphones.  I don't know if that's normal or a symptom. BTW the Emulated line out worked even when the speaker wouldn't. 

Does this sound like it need new tubes or am I looking at something more complicated.  I appreciate any help.

Bought a new DSL40CR in December of 2020 and last month it blew the 630 MA fuse on the PCB. Replaced fuse and swapped out all tubes. Now amp only works on 40 watt but has a lot less volume and does not sound like it did. The PCB has spots around CAPS that look burnt. Any suggestions? Can you purchase the PCB?

Dealer where I purchased not very helpful when I went to them to question about warranty, they kept trying to sell me a  new amp, not Marshall and said I would have to pay any and all costs if it was repairable. 

Really liked the amp when working correctly but am concerned that this would happen again if I purchase another one. 1 year and 3 months and total failure????

Marshall has restored my confidence in their product. They contacted me same day and gave me a list of where to take my amp for warranty repairs. The amp has 3 year parts/5 year labor warranty. Will update again when repairs are complete.

6/2/2022

I purchased a second DSL40cr amp and got my originalback from the shop. Took my repaired amp home before Memorial Day Holiday and so far it is doing great.

Again want to thank the people at Marshall for making this happen once I explained the problem.

Hi everyone. I have seen 2 rig rundown videos where the artists tech's (Eric Clapton and Carlos Santana) say they dial back their volume knobs on their guitars (prs & stray) to get a clean tone and crank it to get distortion and sustain. I have a code which I  have only been playing in my apartment so not to loud. I haven't been able to replicate this kind of technique. I have my code set to plexi through 100 watt Marshall. I'm playing a epiphone sg. Not an expensive one. So my question is what exactly is the hang up? Is it because it's not a tube amp? Is it because the pots or pickups in my sg are not super high level? Is it because I have to keep the volume down in my apartment? Is it all of these things? I'm asking because I'm considering changing the pots and or pickups but I wanted to run this by you guys and get your opinions.

Thanks

RH

This is my first Marshall set up, I have an Origin 20 Head connected to a origin 2x12 cab, when I power it up it makes a loud buzzing sound for 5 seconds or so, I assume it's warming up.,  I have had tube amps like the Peavey Valve King, however it didnt make such a sound on power up.  Is this normal?  

Hi, is there any technical documentation about valves replacement and bias setting?

I own a JCM 2000 DSL 401 and I need information before replacing valves (pairing, model, usage, bias setting).

Thank you.

Could EL84 tubes be substituted in place of the EL34s if need be?  EL34s are becoming less available.

Hello all. I am sorry for what is about to be a redudant and maybe to some, stupid question. I just got my dream amp, the JVM 410h. This is also my first tube amp and I want to care for it for long term use. For silent recording, I am running the line out with an xlr cable from my JVM head to my Scarlett interface, which I connect to my DAW and use cab modelling their for recroding. Do I lieave my standby switch on or off? The STANDBY/ silent recording notation is a little confusing to me. So should switch be pushed up or down? Also, should master volume be set to 0? Thanks in advance

Hello,

I am the proud owner of a Marshall DSL100HR which I think is really great.

I also bought the Footswitch PEDL-91016, to be able to use all the versatility of the amp.

Unfortunately when I use the PEDL-91016 after a while (it varies). Impossible to use the effects loop, the sound changes it looks like a tube is dead, the different channels with the PEDL-91016 are no longer available (it varies).

When I remove the PEDL-91016 I no longer have any problem. When I use the footswitch supplied with the amp, I have no problem and obviously without any footswitch no problem either.

Do you think it's from PEDL-91016, it's still under warranty.

Thanks in advance.

Hello, I am making a big purchase for my first tube amp and amp between the Marshall JVM 410 head and combo versions. So, obviously, the head offers more flexibility in terms of cabinet selection etc. However, the 410 combo also has a line out so that too can be paired with any cabinet if I am not mistaken. If that is the case, why don't more people gravitate towards the combo? Is there anything that the 410H can do that the 410C cannot? All feedback is greatly appreciated.

Hi,

New to the forum, and new to valve amps. I have just bought a Dsl20cr, and I've spent the last 40 mins on standby mode to allow the valves to warm up.

Unfortunately, I'm still not getting any sound out of the amp.

Any suggestions would be greatfully received.

Regards,

Karl

Hi,

I recently bought a used DSL40CR, so far so good.

I play a guitar with EMG 81 setup that works normally perfectly and got no issues with another amp.

When I play in clean channel (grean), pot setting about 1/3, the amp gives to much distortion, it almost souns like clean channel red.

Guitar is in very conditions, best mechanical setup and the electronics has been checked as well.

All tubes of the amp are new and BIAS setting adjusted to 35mV.

I don't know what else to check, could it be a grounding issue?

The amp has a very low noise what I assume is absolutely normal.

I can't play clean with this seup.

Anyone an idea what can cause this issue?

Regards

Joerg

Is V3 the output valve (ECC82/12AU7) on this amp? I have found no information elsewhere on Marshall's site. Thanks in advance. 

Hello,

If I need to replace the stock preamp tubes in the Origin 20 H, what is the exact model.

It show ECC83H and I think they are Shuguangs but not sure. They used to be Marshall branded Shuguangs or JJ but these have nothing written on it except ECC83H. Looks chinese but they sound best I think to nail that JCM-Plexi tone of the Origin. I tried other and it is a slightly different sound. I need to know the exact model.

Thanks

I would appreciate any support you can give me. 

I recently purchased a DSL20CR; when I received it, I heard a strange buzzing sound in the studio, which the other Marshalls did not have, 

I contacted the local Marshall dealer. He told me that it is a common issue, and other similar models had the same behaviour. Still, customers report that regular activity will work itself out until it disappears, in other words, with regular use.

And although it sounded strange to me, on the supplier's website, a customer reported this, I contacted him, and he told me that one day the noise stopped.

Well, today has been several months, and the humming continues,

It starts at 46 dB, but with increasing volume and gain, it reaches 90 dB without any instrument connected, only the power socket.

I have tested it in several places and with regulated electrical outlets, even with filters and signal stabilisation with an inverter. The power supply is optimal, but it has the same behaviour.

I asked the supplier's technician to check it, and then the report says that there is nothing abnormal, that according to him, all the components are correct, and there is nothing that generates problems for its use.

So the supplier tells me that they offer no warranty and no replacement and that this is normal for this amplifier.

I decided to replace all the tube tubes with new ones with the exact specifications.

I bought the Tung-Sol kit and another JJ for this amp, both for power gain and preamp. 

After the change and tried both options, it continued with the same sound, noise; in a previous mail to Marshall, I asked to confirm if this amp needed to do any BIAS process; well, the answer is no; it is not necessary. Still, I compared the tubes before and after, and they had a similar value. at 10W, they gave 24 mA, and at 20 W, about 57mA

I know there are similar problems, and I have read in forums about component changes to solve the problem. Still, those forums also refer to issues with the emulator output, but this is working correctly in my case.

What can you recommend, is there anything I can do to fix it?

I appreciate any help you can provide. 

Betto

Hi I have an Origin 50 head and I want to know what tubes for v1,v2,v3 should I purchase for replacement. Also there is any specific order to place them in.