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Unread 01-06-2012, 04:56 PM   #1 (permalink)
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JVM 210c buzzing

Hey guys. I'm having this serious buzzing/humming problem when using the overdrive channels on my JVM. It's always been noisy from the get go when I got it last year. I see a lot of people complaining about it. I've tried replacing the preamp tube next to the power tubes figuring that would be the first one to go, but had no luck. Got a mogami cable too, still the buzzing continues.
Is this a problem that is a production defect? I really love the sound of this amp but it's ruining recordings. I know a little buzz is to be expected but this is way too loud. If anyone has any advice it would be appreciated.
Thanks
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Unread 01-06-2012, 05:17 PM   #2 (permalink)
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Re: JVM 210c buzzing

Hello ninjacreep and welcome to the forum.

What is your gain setting in the overdrive channel?
What is your volume settings for the overdrive channel?
What is your master volume settings?
Are you engaging the effects loop when you hear the buzzing/humming?

Assuming that your gain setting and volume settings are reasonable, you might have a cold solder joint somewhere. I've read posts where people complain about buzzing and humming which was due to a cold solder joint.

Since the humming is coming from the overdrive channel, I first asked about your settings because they could be a little too high, but the only way to know for sure would be to play through another 210C with your same settings to see if it's your settings or the amp. The JVM does have some outrageous gain, but if you know your way around the JVM, then that helps to eliminate problematic settings.

If your settings are good, then I suspect a cold solder joint or maybe a preamp tube, particularly if you are running the effects loop.

**You could also post this problem in the workbech section to get the attention of more problem solvers. Keep asking questions to see if someone else can help.
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Unread 01-06-2012, 05:19 PM   #3 (permalink)
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Re: JVM 210c buzzing

You mean because of the gain there is too much noise? The JVM has way too much gain on tap. On the orange OD channel I only go up to about 8 o'clock, and with humbuckers that's quite enough for even metal. But if you're blasting the gain and you are set on that type of tone you should use a ISP Decimator (or some type of noise gate), and put it in the FX loop.....
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Unread 01-06-2012, 05:46 PM   #4 (permalink)
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Re: JVM 210c buzzing

Hey Thanks. the cold solder sheds a bit of light hopefully. On the red and orange channels I have the same issue. Gain is on 8 (sometimes 9) volume is at 6/7
I'm not using any pedals at all. My master volume is super low most of the time because I'm practicing at home. Reverb is off
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Unread 01-06-2012, 07:48 PM   #5 (permalink)
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Re: JVM 210c buzzing

If gain is at 8 on an OD channel your gonna need a noise gate, my gain is at 2 and that's a lot of gain. re valves have you tried swapping around the pre amp valves with a known good one. any one of those valves could give you a buzz.
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Unread 01-06-2012, 08:10 PM   #6 (permalink)
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Re: JVM 210c buzzing

Quote:
Originally Posted by ninjacreep View Post
Hey Thanks. the cold solder sheds a bit of light hopefully. On the red and orange channels I have the same issue. Gain is on 8 (sometimes 9) volume is at 6/7
I'm not using any pedals at all. My master volume is super low most of the time because I'm practicing at home. Reverb is off
Hello ninjacreep. Thanks for hitting me back on the settings info.

Question: in regards to your settings, do you mean to say you are refencing your settings like a clock (e.g. o'clock), or as printed on the face plate? For example, on the gain settings, do you mean 8 o'clock, or do you mean 8 on the face plate of the JVM?

Is preamp #1 covered with the supplied metal "can"? If not, then I suggest you get that covered right away and see if it makes a difference (might cost you $5-10 for an original).

About your settings: If you mean 8/9 o'clock, I feel those are pretty good settings, particularly when in orange and red mode. If you mean 8/9 as printed on the face plate, then I might wonder if the buzz/humming you are experiencing is a result of setting the gain too high. It's up to every player to decide what they like best, so I can't tell you that you are wrong. I have a 410H and I can tell you that if I were to play with those same settings, I would get such an awful hiss, buzz, and hum.

In addition to a cold solder joint and bad preamp tube, you might also want to research your pickups. Some pickups will be extremely susceptible to noise, such as a traditional single coil pickup. You might need to purchase a pup that is dipped in wax or designed with stacked coils. Active pups might also help. Additionally, you might also want to investigate whether your guitar is shielded, since high gain amps will greatly expose a guitar that is improperly shielded or not shielded at all.

The cheapest way to look at the problem is to see if your settings reproduce the same buzz/hum problem in another 210C-if so, you got your culprit (a noise reduction pedal/noise gate might be in order). Next thing is to research your guitar to see if your pups are designed for moderate to hot output (if your pickup is a moderate to hot output, then it probably is wax potted, stacked coils (for single coils), or active-all of which would mean low noise and probably not the source of your buzz/hum problem. Finally, I'd check to see if the guitar is properly shielded. Normally, you might find shielding on the pickguard of a strat-style guitar, but you can also apply shielding to the pickup cavity to further reduce noise. *If you are using a covered humbucker, check to see that the pup magnet is soldered to the "can" as this solder joint provides a ground that helps reduce noise.

If none of those options help, then it could be a bad preamp tube or a cold solder joint. Use caution when working inside the amp as there is stored voltage in some components that can kill you (the big black capacitors in the JVM are one of those type of components.

Hope you figure out the problem. Good luck.
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Unread 01-06-2012, 09:06 PM   #7 (permalink)
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Re: JVM 210c buzzing

Is this a new problem or has the amp always had it? Is it mains type hum?
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Unread 01-06-2012, 10:33 PM   #8 (permalink)
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Re: JVM 210c buzzing

Quote:
Originally Posted by ninjacreep View Post
Hey Thanks. the cold solder sheds a bit of light hopefully. On the red and orange channels I have the same issue. Gain is on 8 (sometimes 9) volume is at 6/7
I'm not using any pedals at all. My master volume is super low most of the time because I'm practicing at home. Reverb is off
If you're gain is at 8 or 9 then you will get CRAZY hissing and noise, and in that case you need a noise gate in your loop. If you mean 8 or 9 o'clock, then you amp shouldn't be making hardly any noise. That's at where my gain is at and it's quiet.
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Unread 01-07-2012, 11:08 AM   #9 (permalink)
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Re: JVM 210c buzzing

Hey Guys, you have all been super helpful. Thanks for all the info! I will try each one.
My settings are the faceplate settings. Also, I do not have a metal covering on the preamp tubes. I will look into that for sure. As I was researching I found this on youtube.
I have the same loudness of that buzz, but I'm not using any pedals.
Thanks again,
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Unread 01-07-2012, 02:36 PM   #10 (permalink)
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Re: JVM 210c buzzing

i tried lowering the gain as well. Still getting a lot buzz.
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Unread 01-08-2012, 05:35 AM   #11 (permalink)
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Re: JVM 210c buzzing

You need a cover for V1 defo. but you shouldn't be getting that much noise with or without one. If your tubes are ok and bias is correct and you mains supply is good. the cable to the cab is a speaker cable not instrument cable. time for a tech.
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Unread 01-08-2012, 03:04 PM   #12 (permalink)
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Re: JVM 210c buzzing

Yeah, I should probably look for a good amp tech here in NYC.
Thanks
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Unread 01-09-2012, 03:17 PM   #13 (permalink)
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Re: JVM 210c buzzing

Quote:
Originally Posted by ninjacreep View Post
Yeah, I should probably look for a good amp tech here in NYC.
Thanks
Lane Sparber is one guy I'd recommend; he's in Queens. I'm not sure what his workload is right now, as I think he was a bit ill for awhile. You can contact him on this forum or on FB:
Lane's Workshop | Facebook.

Good luck with your amp.
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