Question about Marshall Amplification Marshall JVM210H Amplifier Head, Gently Used Summerfest Model

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Marshall jvm 210h reverb troubleshoot

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Marshall 210h After using 15-20 minute increasing hum louder to louder. and big tubes goes very hot and colour going full red . what would I do?

Possibly the tube heater power supply is faulty. It will need to be professionally repaired.

Other things to consider:

Faulty tube(s)

High frequency oscillation

Aug 19, 2015 | Marshall Music

1 Answer

Marshall 210h apm hum problem

sounds like pre amp tube. and you should replace all in that row. never 1 at a time. Good luck.

Aug 19, 2015 | Marshall Music

1 Answer

Just got a new Marshall DSL40C. The reverb does not work on either gain control or with the footswitch. Why?

Nothing wrong with the amp. Google it- these amps have extremely weak reverb. All of them are the same. It's the one weak point about these amps. And I love mine. I mic it when we gig. Sounds awesome both clean and driven. But you'll have to get a separate reverb pedal if you want "girl crush" or "pipeline" reverb. Don't listen to the above posters. It's the way these amps are.

Nov 30, 2013 | Marshall Music

1 Answer

Marshall jvm 410h i'm getting loads of feedback when i use od1 or od2 orange or red mode

Dampen the strings of your guitar. If feedback disappears, then you need to move the amp so it can't resonate the strings of the guitar. OD1 and OD2 WORSEN the chances of the feedback into the strings. When this occurs you can often see the strings vibrating without the player picking them.

Nov 22, 2010 | Marshall Amplification Marshall JVM Guitar...

1 Answer

Need reverb tank for a Marshall Amp 8280,but don't know what type

Try this website: Look under reverb tanks. Check to see how many springs your old tank has and what size it is. I think Marshall used Accutronic tanks but have a look at all of them. There are pictures and info for each. Hope this helps.

Feb 27, 2010 | Music

1 Answer

My marshall classic reverb 30 makes sound some times and some times when you play with the volume knob it stops

The volume control knob PROBABLY is broken, dirty or has bad soldering to the circuitry.

Use some CRC226 in the control if dirty. While you have the unit apart, check the soldering and for any circuit board cracks.

Feb 21, 2010 | Marshall Music

1 Answer

Hi my Marshal G15 is making an echoy twang when played loud (& open E chords). does this mean the reverb is broken?

I suspect the vibration when it is loud is vibrating a reverb tank within the unit.

Test this bylistening with headphones and see if you get same sound.

It may be the reverb has a resonance or the cabinet does that is sensitive to your E chords.

The shock mounting of the reverb may have failed to isolate the reverb tank from speaker vibrations... hence the headphone test.

Jan 27, 2010 | Marshall 15 Watt Guitar Amp

1 Answer

Marshall VS65R is powered up it hums

Blown speaker NO (would not get sound at all)

Bad Reverb UNLIKELY (controls would deselect reverb and it would be out of circuit)

Bad preamp tube NO (controls have no effect)

Bad rectifier and/or filter caps LIKELY

Bad power amp POSSIBLE

Nov 29, 2009 | Marshall Mg50dfx 50-Watt Combo Guitar...

1 Answer

Hi, I have a Marshall 8240. The Reverb output

probably the reverb tank These coils are very thin and tent to break easily

Nov 05, 2009 | Marshall Amplification Marshall MG250DFX...

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