Hi, i have just aquired a haze 15 head in great nick.

please anybody could you advise on what marshal power tubes are used as in maker ?

Also they use three ecc83 the first being a different code ( this is the one with the aluminium cover) is this the higher gain one? if so could i swap for a lower gain with no problems.

Also has anyone upgraded the speaker that is fitted ( marque) ? if so to what just interested

Thanks John

I have an Axe Trak insulated speaker (here is a link to info on the speaker) www.axetrak.com/guitarmanual.pdf

When I have run it from the Marshall it has cut out after playing for a while, I have turned off the amp and then the following day used the amp with its built in 12" speaker and it has been fine. When i read the JTM 60 manual it said it is fine to drive a 8ohm from the external speaker output ONLY, not the internal out connection.

Is this OK? when things cut out it makes me worry about my Marshall and I really don't want to cause it any damage.... Also I have checked the speaker lead and that is all good, when it cut out it the sound broke up and faded in about 1 second. It is the 2nd time is has happened so i thought I best get some advice. The Axe Trak is great and means i can play a valve amp and get valve amp tone and not disturb my neighbours, it is a great bit of kit for home recording and I want/need to be able to use it. Any advice?

Thanks, Robin..

Hey, 

So this is my first personal all valve amp. Ive had a few around but never one of my own, i know how to use them and what not to do, but ive never owned/played one long enough day to day to realise if the tubes are not properly working. 

The other day, i turned on my amp (It's a 110 volt made for USA mini jubilee head that i run through a transformer at 230 volts mains) as usual, and after i let it be on standby for about 10 minutes, when i turned it on, there was no sound. I proceeded to turn it back on standby and check all my cables in my signal chain on my board, and turned it on again (this happened a few times, maybe 4 or 5) and still no sound. 

I then checked the back because i do connect some pedals in the effects loop, and to my shock the speaker cable wasnt connected! (someone must have moved it around while cleaning and i never noticed as its on the back flush to a wall) 

I immediately turned the amp off. and then connected the speaker cable of my cab to the right speaker out, and after a few minutes, started up the amp, after giving it a good 10 minutes on standby. It worked! and the EQ was reacting normally, everything seemed fine. I had friends over so didnt really sit down and check in depth or notice anything off tone wise. Plus it was running on fairly low volume since it was late. 

It's been about 3 days, and i played yesterday, didnt notice anything odd. But today, i feel the overall volume the amp is giving out is really low compared to before. and i know this amps clean isnt really super clean with humbuckers but im feeling like its breaking up way too much and quickly as you turn up.  Could it be that i busted a power tube or pre amp tube? The amp is a year old and played fairly reglarly and gigged only 10 or so times. 

Any help, advice on the matter will be appreciated! Thank you in advance! 

Hello!  I have a Marshall DSL40c, which I absolutely love.  I swapped the speaker out for a Celestion Vintage 30 (16 ohm) a little over a year ago, and it sounds great.  However, I recently got a lower wattage tube amp (Vox AC4TV) and have been running it through the DSL40c (basically using the DSL as a speaker cab, with the power chord disconnected). 

So here's the problem:  After 2 days of using this configuration, the DSL has started making a sound when I play the vox through its speaker.  The best way I can describe the sound is that it is like a tabmourine, like those little metal disks jingling together.  It does this on certain notes, like the open low E string, or a C chord, but not on other notes like a B chord (i.e. 1 fret away).

When I run the the Vox alone through its internal speaker - no issues at all.  When I run the DSL amp section alone through it's vintage 30, no tambourine sounds, although it seems that the green clean channel is lower volume than it used to be (the other 3 channels seem to me the same volume as normal).  There is also some instability in the volume (goes in and out, but in a sublte way).  There is some clicking and popping when I first fire it up, but this stops after it has been on for a while so not sure if this is normal or not.

I have been looking up reasons why amps may rattle, but everything I am finding describes issues with the tubes that are being played through - my issue seems to be a bit different, since the rattling (tambourine jingle) sound I am hearing seems to be coming from the Marshall when I am not using its tubes (playing through the Vox as a head).

Is it possible that a tube has gone bad in the Marshall, and when I play the Vox through the Marshall's speaker, the vibration is rattling the broken tube and making this tambourine sound?  Would a reduction in the volume of the green clean channel imply it is a preamp tube vs power amp tube (since the other channels are unaffected?)

Thanks for any help you can offer.  I don't mind taking it in to a tech, but I have read a lot of posts of people who took their amps to techs and had tubes changed, etc. and the problem persisted.  I want to have a pretty good idea of the problem before I start investing in having it fixed.

Thanks!

Hello

In the manual is told not to use the Code 100 head without a speaker? Why?

I think it's not a valve amp.

Martin

Purchased used amp, jcm 2000 tsl 100 2003 with 2003 1960a slant cab. Bought footswitch, being shipped. my questions are 1) will dsl 100 cover fit my tsl 100   2) where can i get replacement tubes 3) Can i get paper manuals for amp and cab    4) is there a rt angle speaker cord available

I have looked for a definite answer to this and have not found one. I played my amp the other night with no problems, but last night as I turned on the amp it just died on me as soon as I turned the standby off. There was no noise, pops, crackles, fizzes. It just turned off. I checked the main fuse and it was blown. I have not had any issues with tubes and they have not shown any signs of wearing out. I made sure my amp was connected to the cab correctly (remember i have had this rig for 8 years) and that I had a speaker cable rather than a guitar cable.  I found online there could be issues with impedence and what not. I took the back off of my cab and noticed that a positive lead on one of my v30's became disconnected.  I thought, 'Could it be?" So I reconnected it and replaced the fuse and the amp worked as advertised. I played for an hour or so and no problems yet. Could it be that the discoonnected positive lead on one speaker caused it to blow a main fuse?