Mark IV help

Drew · 10-19-2007, 06:08 AM

Guys, if he had the same problem with a Cube 30, odds are it's not a microphonic tube.

It's probably microphonic pickups - go down to a guitar shop and see if your guitar does the same thing in all the amps there, but another guitar off the wall does not. Likewise, you'd get weird crackle and hum issues which possibly could turn into feedback if you were using a speaker cable instead of a instrument cable, but that's a real longshot...

urklvt · 10-19-2007, 06:11 AM

Good point Drew.

7StringofAblicK · 10-19-2007, 01:06 PM

Are you engaging in enough sex? I had that problem but sex was a quick anecdote

Anthony · 11-03-2007, 12:04 PM

Oh shit, sorry guys, and thank you. I completely forgot I made this thread. Ya, I will post a video today, I'll give you an example. It has crazy hum for each one of my guitars. I'll post settings too. Sorry.

Drew · 11-03-2007, 01:33 PM

Each one of your guitars? That's weird.

At my apartment in Waltham, there was something up with the grounding. No matter what I did, even with 'buckers, there was always background hum present with the amp. Anywhere else I'd plug in, it was dead silent. I looked at Furman conditioners, but ended up moving before I shelled out that kind of cash, and haven't had a problem since. Maybe it's something like that? Can you try the Cube (since it's the most portable) somewhere else and get back to me?

Anthony · 11-03-2007, 03:37 PM

Yes, I can. I can't do the video today unfortunately, I'm out of town right now, I'll get the video up tomorrow night.

But yeah, the buzzing is ridiculous. And it gets worse, depending on which direction I point the guitar.

Rick Pierpont · 11-03-2007, 08:46 PM

First thing to figure out is exactly where the problem lies. You have to figure out between the guitar, cables, other pieces in the mix, and the amp itself.

It sounds like you've tried different guitars and had the problem occur on two different amps. Is this still the current situation? If so, try a different cable between the guitar and amp. If that doesn't work, it will be time to simplfy your signal chain in order to trouble shoot. I find it easiest to immediately simply my signal chain completely (guitar > amp) and start adding things back in one at at time if it goes away. If it doesn't go away and you have defintely ruled out the guitar and cable (that exact guitar and cable has been verified to be 100% electronically problem free), I can walk you through some things to check on the Mark IV. It will include even simple things like making sure the channel switching selector on the back is set in the correct position.

Even if it turns out to be the amp, just know that Mark IVs still rule - you just have to get yours fixed first!

Anthony · 12-03-2007, 04:21 PM

test 1
mkiv
rg7321- Air Norton7- DS7
Cable 1

Test 2
mkiv
Rg7321
Cable 2

Test 3
mkiv
RG370 -Stock
Cable 1

Test 4
mkiv
RG370
cable 2

Test 5
Cube 30
RG7321
Cable 1
Test 6

Cube 30 RG7321
Cable 2
Test 7

Cube 30
RG370
Cable 1

Test 8
Cube 30
RG370
Cable 2

All ended with mass feedback, almost unplayable. My webcam was unable to pick it up.

budda · 12-03-2007, 06:32 PM

your webcam couldnt pickup feedback???? pretty sure any microphone would be able to pick up feedback, especially if it makes the sound unplayable.. :S

do you get feedback if you play a friend's rig?

Anthony · 12-03-2007, 06:38 PM

I am a dumbass. I had my webcam mic off. Hold on.

I'm uploading a vid right now onto youtube.

Dammit. Power died on my whole block last night.

Videos up

bump

10-19-2007, 06:08 AM	#11
Drew Fear the Polo! Join Date: Aug 2004 Location: Somerville, MA Posts: 21,267 Real Name: Call me Ahab... Main Seven: 1991 Ibanez UV7PWH Main ERG: Sherman 5-string bass Rig: Mesa Recto-verb 50 Thanked: 141	Guys, if he had the same problem with a Cube 30, odds are it's not a microphonic tube. It's probably microphonic pickups - go down to a guitar shop and see if your guitar does the same thing in all the amps there, but another guitar off the wall does not. Likewise, you'd get weird crackle and hum issues which possibly could turn into feedback if you were using a speaker cable instead of a instrument cable, but that's a real longshot... "...and everything under the sun is in tune, but the sun is eclipsed by the moon."

10-19-2007, 06:11 AM	#12
urklvt This is my alt Join Date: May 2005 Location: Leesville, LA Posts: 2,420 Real Name: urk Main Seven: 28.625" S7420 Main ERG: Agile Intrepid 8 Rig: Mesa Mark IV Thanked: 4 / 1	Good point Drew. "Dude, you need to find the right fucking meds to be on, because you are the most unstable person I know."

11-03-2007, 08:46 PM	#17
Rick Pierpont ss.org Regular Join Date: Oct 2007 Location: Baltimore, PA ;-) Posts: 106 Real Name: Rick Main Seven: Ibanez RG7621 Rig: Mesa Mark IV / G Maj Thanked: 5	First thing to figure out is exactly where the problem lies. You have to figure out between the guitar, cables, other pieces in the mix, and the amp itself. It sounds like you've tried different guitars and had the problem occur on two different amps. Is this still the current situation? If so, try a different cable between the guitar and amp. If that doesn't work, it will be time to simplfy your signal chain in order to trouble shoot. I find it easiest to immediately simply my signal chain completely (guitar > amp) and start adding things back in one at at time if it goes away. If it doesn't go away and you have defintely ruled out the guitar and cable (that exact guitar and cable has been verified to be 100% electronically problem free), I can walk you through some things to check on the Mark IV. It will include even simple things like making sure the channel switching selector on the back is set in the correct position. Even if it turns out to be the amp, just know that Mark IVs still rule - you just have to get yours fixed first! Rick Odin's Court Lead Guitar / Backing Vocals My MySpace

12-03-2007, 06:32 PM	#19
budda Guiterrorizer Join Date: Jan 2007 Location: Deep River ONT (summer), London ONT (school) Posts: 8,491 Real Name: Justin Main Seven: WTB: Dean EVO 7 Rig: JSX->XXX w/ WGS CL80 Thanked: 66	your webcam couldnt pickup feedback???? pretty sure any microphone would be able to pick up feedback, especially if it makes the sound unplayable.. :S do you get feedback if you play a friend's rig? 3 cheers for free gear! "Do you like burned toast with your JAM? cuz we're on FIRE!"

12-03-2007, 06:38 PM	#20
Anthony You a cawp!? Join Date: Jun 2007 Location: Nassau Long Island Posts: 2,029 Real Name: Anthony Main Seven: Purple Septor 727 Main ERG: I owned a 2228 for a week Thanked: 32	I am a dumbass. I had my webcam mic off. Hold on. I'm uploading a vid right now onto youtube. Dammit. Power died on my whole block last night. Videos up bump Last edited by Anthony; 12-04-2007 at 04:33 PM. Reason: Automerged Doublepost

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10-19-2007, 01:06 PM	#13
7StringofAblicK Senior Member Join Date: Jan 2005 Location: Kentucky Posts: 2,731 Real Name: Eric Rose Main Seven: Carvin/Hellraiser 7 Rig: VHT Pittbull 100/CL Thanked: 18	Are you engaging in enough sex? I had that problem but sex was a quick anecdote

11-03-2007, 12:04 PM	#14
Anthony You a cawp!? Join Date: Jun 2007 Location: Nassau Long Island Posts: 2,029 Real Name: Anthony Main Seven: Purple Septor 727 Main ERG: I owned a 2228 for a week Thanked: 32	Oh shit, sorry guys, and thank you. I completely forgot I made this thread. Ya, I will post a video today, I'll give you an example. It has crazy hum for each one of my guitars. I'll post settings too. Sorry.

11-03-2007, 01:33 PM	#15
Drew Fear the Polo! Join Date: Aug 2004 Location: Somerville, MA Posts: 21,267 Real Name: Call me Ahab... Main Seven: 1991 Ibanez UV7PWH Main ERG: Sherman 5-string bass Rig: Mesa Recto-verb 50 Thanked: 141	Each one of your guitars? That's weird. At my apartment in Waltham, there was something up with the grounding. No matter what I did, even with 'buckers, there was always background hum present with the amp. Anywhere else I'd plug in, it was dead silent. I looked at Furman conditioners, but ended up moving before I shelled out that kind of cash, and haven't had a problem since. Maybe it's something like that? Can you try the Cube (since it's the most portable) somewhere else and get back to me?

11-03-2007, 03:37 PM	#16
Anthony You a cawp!? Join Date: Jun 2007 Location: Nassau Long Island Posts: 2,029 Real Name: Anthony Main Seven: Purple Septor 727 Main ERG: I owned a 2228 for a week Thanked: 32	Yes, I can. I can't do the video today unfortunately, I'm out of town right now, I'll get the video up tomorrow night. But yeah, the buzzing is ridiculous. And it gets worse, depending on which direction I point the guitar.

12-03-2007, 04:21 PM	#18
Anthony You a cawp!? Join Date: Jun 2007 Location: Nassau Long Island Posts: 2,029 Real Name: Anthony Main Seven: Purple Septor 727 Main ERG: I owned a 2228 for a week Thanked: 32	test 1 mkiv rg7321- Air Norton7- DS7 Cable 1 Test 2 mkiv Rg7321 Cable 2 Test 3 mkiv RG370 -Stock Cable 1 Test 4 mkiv RG370 cable 2 Test 5 Cube 30 RG7321 Cable 1 Test 6 Cube 30 RG7321 Cable 2 Test 7 Cube 30 RG370 Cable 1 Test 8 Cube 30 RG370 Cable 2 All ended with mass feedback, almost unplayable. My webcam was unable to pick it up.

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Mark IV help