Hi, can anyone explains to me WHY we can't use a CODE 100H without the cabinet? For VALVE amps there is a good reason for which you need the cabinet always connected but for solid state amps it seems very strange.

Is it maybe an error in the manual? Maybe it's a phrase that has been written for all the Marshall valve heads and it was mistakenly added to the CODE as well?

Please let me know, I have an application where I only need the 100H coming up soon.

Thanks!

My 1974x amp is quiet when nothing is plugged into it, but as soon as I plug my intrument cable into the non-tremolo channel, I get this awful cyclic noise.  Does anyone know what to do?   I replaced the ECC83 tubes one by one (testing it between each tube replacement), but it didn't fix the problem.

Here's a video of my problem.

https://youtu.be/lN_lhUAu7jA

Hello I'm considering to buy DSL1HR or CR for silent recording at home. But I would like to use fx loop SEND output to record raw valve soud to apply impulse response later.

Is it safe to unplug cabinet, and without connecting headphones use these amps in such manner? 

And if so, why? Usually valve amp needs speaker load

Thank you in advance for the answare!

Sergey

Is the DSL5CR Combo cathode bias or will I need to bias the amp after swapping tubes? Pre-amp and power amp tubes? Thanks in advance

Amp is a little over a year old was fine then past few weeks after warmup the volume would dump. All cables, inputs were checked and new JJ tubes put in which seemed like it fixed the issue However when I engaged the Tone Shift button the volume dumped again and when manipulating this button it caused the amp to crackle and seemed to be shorting out the power which intern was dumping the volume.. My tech replaced the Tone Shift curcuit but still when pushing the button in it causes the same issue, we are at a lost..and frustrated...Any Comments or Suggestions greatly appreciated

Dear,

I have a new Marshall DSL1CR and it make a popping noise when changing channels from the Ultra gain to Classic gain while playing.

If I mute the guitar, or changing channels from the Classic gain to Ultra gain or using the emulated out there is no pop.

There is same noise when switching off it.

Is it normal or somethings wrong with my combo?

Thanks & best regards.

I need a new circuit board for my Marshall 20/40 combo amp. I turn the amp on and it will play for a little while and then all sound ceases until I turn it back on. I've change out tubes to no avail and I broke out my old amp mod equipment and tested circuits. That's the only piece I am unfamiliar with so I'm thinking that's the issue. My vendor tells me they can't order it because the amp is discontinued. Where can I order one so I can fix my amp?

Hello everyone,,

I know that turning a "TUBE" amp on without a speaker load on the output will damage the amp.

(the no-load condition will cause the output voltage to increase until the output tubes burn out, which can then lead to other component  damage)

Is this also true for a CODE 100 amp?  Is there a risk of damage to the output section, with turning the unit on without a speaker cab load connected?

Would it be safe to operate the amp with just headphones connected instead of a speaker cab?

Would it be safe to operate the amp without either a speaker cab or headphones connected?

I ask because my computer (which is a desktop) is in a different location in my house than my amp.

Doing firmware updates or testing out patches requires either moving my computer or my amp, both of which are very inconvenient.

It would be much easier if all I had to move was the head.

Hello

I want to exchange valves in my Origin 20h, ordered some from Tube Amp Doctor. After I exchange them do I have to rebias it? Is there a manual for rebiasing? I wasn't able to find anything which would give me even slight bit of a hint about it .

thanks

iosman

I have a bunch of Marshall amps and recently added a Code 100H to my collection.

I'd like to connect it to a JMD1 102, in order to use it as a valve power amp and cab for the Code as a preamp. I usually do it on my other amps by connecting the send from the "preamp" to the return of the "power amp", but in this case it didn't work, the only way to get some sound from it was connecting the headphones output to the input of the JMD1, but that's not what I expect once I have another preamp in the chain. Did anyone tried something similar?

Currently my JVM410HJS squeals periodically.  Initially this would only happen occasionally and I was still able to gig with it, but now it has become to frequent to use.  It will do this even if unplugged from a guitar and will do it no matter which channel it is on.  Channel switching does not stop it.  I am not sure where to start.  Am going to change out the tubes and reset the MIDI switch, but otherwise will have to travel a good distance to find a qualified tech.  Anyone else ever had this issue?

Ive started playing guitar again later in life after first playing at the age of 10. My skill level is probably moderate but I enjoy playing again. I don’t gig or plan to be in a band. I’m either playing at home by myself or I have a buddy that I will go play with at his house. I have a couple nice Epiphone’s and 2 Yamaha DG60 amps. Theses amps are pretty good and have allot of different adjustments for different sounds. They both have an intermittent issue where something cuts out like the gain or reverb. I’ve though about taking them to get looked at but that’s another decision other then my request. 

Lately I’ve been kicking around getting a new amp. The more research I do the more I get confused. Get another solid state amp, a modeling amp or a tube amp. I’ve never had a Marshal and out of pure envy I’d like to get a Marshall but only if it’s the right amp for me. Money isn’t a deterrent. I’ve worked my way up to looking at a Marshall combo 2x12 100 watt. JVM210C. 

The reallity is I don’t think a 100W tube amp is a smart choice for me. Currently I play my 60W no more then 50% volume. And from what I’ve been told is you need to turn up a tube amp to saturate the tubes to get the most out of the sound. I’d probably only turn a 100Watt up past 50% on rare occasions like when I’m drunk and think I sound better then I really do. 

Is there a 1x12 or 2x12 Marshall tube amp that you can switch between 50W and 100W? That might satisfy my needs? What about the JVM215C? What about the code 50?

I should note I like to play classic rock/rock and metal, Led Zeppelin, Black Sabbath, AC/DC, Kiss, Jimi Hendrix, UFO, OZZY, Pantera..... 

I want something that sounds great played quite or LOUD! I don’t want something that needs a bunch of pedals for different sounds. But I don’t want an amp that has a bunch of effects but just has that fake/cheap sound. I know I’m asking allot. I just need some good advice from someone that has been around music allot and has knowledge about amps. Then I can narrow down some choices and then go to a guitar center or somewhere  and play a couple!

Thank you in advance,

signed “confused” Jeff

Hey Mates,

Having issues with a clients amp, seems that after a retube that i did, he was playing and after about 30 min, it gradually started losing sound and then cut sound completely.  I did the re-tube myself, and biased it properly and i was able to play it for about 40 min with absolutely no issues.  List of troubleshooting steps i have done:

tried a different speaker cable

tried a different guitar cabinet

tried a different guitar and guitar cable

tried the old tubes, additionally bought a 12ax7 and tested each pre-amp tube

tried a different power source

Have tried different power tubes

have checked and replaced the fuses

Now this is what i am THINKING is the problem, I think it might be something with either the heater curcuit fuse, or i think it's called a BRT1 Rectifier?  I did alot of research and it seems that the people having MY issue, explain the same symptoms of what i am having.

Now i have to make this clear, I AM NOT A PROFESSIONAL TECH, just a guy helping bands out with tech stuff that they don't know how to do.  So any help is appreciated.

Thanks!

Hi. I have bought the Marshall Code 212 cabinet with 8OHM. Now I want to buy Marshall DSL1HR tube head with 16OHM. Can I connect 16 OHM head to 8 OHM cabinet? Thanks in advance

So I've been thinking about buying a Celestion F12-X200 speaker for my code 50 and was wondering it this would work. The reason I need to know this is because even though I know you can use an 8ohm speaker on a 4ohm tube amp, I'm not sure about a digital amp. Could anyone tell me if this is possible.

hi everyone, i have a CODE 50 and the biggest complaint i have is finding a preset that allows the amp to be "sensitive" to the controls on my guitars.

you know with any halfway decent tube amp you can ride the volume knob on the guitar to not only turn down (attenuate) the volume but actually change the tone. i know most people use what i call "help me box's" to do this, however, i never use those things. my question is, does anyone know a preset that i can program that will achieve this?

the basic sound would be any Fender or Marshall.

i look forward to anything you all have to say,

thanks,JP

Hey everyone,

I'm hoping someone can help me troubleshoot a new piece of gear I purchased. I recently bought a used Marshall DSL40CR that was running fine, but just tonight the High channel stopped working. Low is perfectly fine, but Highstarted having a  heavily muddied sound and now I'm hearing nothing out of it. All tubes are glowing, but I figured I'd seek out some sage advice before taking things apart and potentially making things worse.

Thanks!