Mark IV Crazy Cool!

Pre Recto days. Boogie modified Fenders, Mark I-IV, Dual Calibers, etc

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mysterblues
Mark I
Posts: 33
Joined: Tue Feb 11, 2014 4:21 pm

Mark IV Crazy Cool!

Post by mysterblues » Sun Apr 13, 2014 9:59 am

Just purchased my first Mesa!! Mark IV-Holy crap! Within 20 seconds of plugging in I knew I have the best amp of any I have had! Used to play Fender Supers and Twins, Have had Marshalls, Hughes and Kettner, Rolands, Ampegs, and so on. Still love my Musicman 210 HD 130, but the Boogie is immediately noticeably a better quality sound. I play semi hollows through this with vintage Gibson pups and I really don't think I will ever need another amp!!! Although, the reverb does not work--Any suggestions?
Mesa Boogie Mark IVa
Musicman 210 HD 130
2 Epiphone Sheraton II's historic spec pots
upgraded shielded wire vintage Gibson pups
RotoVibe two modded Ibanez TS9D's
Danelectro Chours Boss Harmonist Boss DD5 Delay
Morpheous Bomber Boss Loop Station

mysterblues
Mark I
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Joined: Tue Feb 11, 2014 4:21 pm

Re: Mark IV Crazy Cool!

Post by mysterblues » Sun Apr 13, 2014 2:56 pm

ok, I guess I will start by checking the cables.........
Mesa Boogie Mark IVa
Musicman 210 HD 130
2 Epiphone Sheraton II's historic spec pots
upgraded shielded wire vintage Gibson pups
RotoVibe two modded Ibanez TS9D's
Danelectro Chours Boss Harmonist Boss DD5 Delay
Morpheous Bomber Boss Loop Station

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Markedman
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Re: Mark IV Crazy Cool!

Post by Markedman » Mon Apr 14, 2014 1:32 am

More than likely the reverb is an easy fix, either it's plugged in backwards or the tube is shot. The springs or the wires in the tank might be broken, but that is rare, even rarer is the potentiometer is shot. In a month you'll love that amp even more than you do now, they grow on you. Read up on tubes, that's where you'll be headed when you want "more & better."
JP2C, Mark llC++ DG, Mark IV-A/B.

dodger916
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Re: Mark IV Crazy Cool!

Post by dodger916 » Mon Apr 14, 2014 7:03 am

mysterblues wrote:ok, I guess I will start by checking the cables.........
Is it a Rev A or B? You can easily tell by the loop jacks: four jacks = Rev A, three jacks = Rev B. Reason being, the Rev B does not have a single dedicated tube for reverb; the duty is split between two preamp tubes.

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mysterblues
Mark I
Posts: 33
Joined: Tue Feb 11, 2014 4:21 pm

Re: Mark IV Crazy Cool!

Post by mysterblues » Tue Apr 15, 2014 3:33 pm

ahhhh, thanks for the input! Actually it was just a cable not seated in all the way.
Mesa Boogie Mark IVa
Musicman 210 HD 130
2 Epiphone Sheraton II's historic spec pots
upgraded shielded wire vintage Gibson pups
RotoVibe two modded Ibanez TS9D's
Danelectro Chours Boss Harmonist Boss DD5 Delay
Morpheous Bomber Boss Loop Station

tonedover
Bottle Rocket
Posts: 4
Joined: Tue Apr 08, 2014 1:49 pm

Re: Mark IV Crazy Cool!

Post by tonedover » Tue Apr 15, 2014 11:12 pm

Ha! OP and I each got our first mesa the same week - I also with a mark iv (mine is the A version with markering on the chassis indicating a "born on " date of 06/90 )

I too have reverb issues. First previous owner had unplugged one jack, now lots of reverb noise. Pulled tubes today and lo and behold there is a 12ax7 in the preamp v4 which even has marker written beside it to put a 12aT7 there - wonder if that's my fix... Ordered a mesa replacement off of sweetwater (free shipping)
I know ax's and at's are nearly the same but due to the nature of the mark iv gain stages I would think that would be the cause of thr reverb humming

Anyways I love this amp. I ..... Think about it during the day.... I may have a ..... Problem :)
Mark IVa , vertical 2x12

ReverbIsANoun
Mark I
Posts: 25
Joined: Wed Apr 23, 2014 10:58 pm

Re: Mark IV Crazy Cool!

Post by ReverbIsANoun » Wed Apr 23, 2014 11:19 pm

mysterblues wrote:Just purchased my first Mesa!! Mark IV-Holy crap! Within 20 seconds of plugging in I knew I have the best amp of any I have had! ?
I'll let you know how my Mark IVa sounds through a Two Notes Torpedo in a few weeks. I've never been able to turn mine up enough to really hear it in its glory.

Some say, to truly appreciate the Mark IV, you need a 4x12 bottom, and a big big room. Hopefully I can experience that in a virtual sense.

bgh
Mark III
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Re: Mark IV Crazy Cool!

Post by bgh » Thu May 01, 2014 7:53 am

tonedover wrote:Ha! OP and I each got our first mesa the same week - I also with a mark iv (mine is the A version with markering on the chassis indicating a "born on " date of 06/90 )

I too have reverb issues. First previous owner had unplugged one jack, now lots of reverb noise. Pulled tubes today and lo and behold there is a 12ax7 in the preamp v4 which even has marker written beside it to put a 12aT7 there - wonder if that's my fix... Ordered a mesa replacement off of sweetwater (free shipping)
I know ax's and at's are nearly the same but due to the nature of the mark iv gain stages I would think that would be the cause of thr reverb humming

Anyways I love this amp. I ..... Think about it during the day.... I may have a ..... Problem :)
Tonedover, did your new tube solve the noise issue? (Just curious)
Lefty guitars: Gibson SG standard (1977) • Gibson LP custom (1979)
Amps and such: Mesa Boogie Mark IV-B • Mesa Nomad 45 • Mesa TA-30 • Effectrode Blackbird • Kingsley Jester • AMT SS-11a • Zoom G5

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kmanick
Mark IV
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Re: Mark IV Crazy Cool!

Post by kmanick » Fri May 02, 2014 1:15 pm

congrats!
I had an "A" and foolishly sold it 2 years ago, but I just found a really clean "B"
that is being delivered today. :D
Axe FX II
MFC 101
JSX Head
Mesa 50/50 (incoming)
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mysterblues
Mark I
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Re: Mark IV Crazy Cool!

Post by mysterblues » Fri Jun 06, 2014 3:28 pm

After some time now getting to know the MarkIV, I have decided that the lead channel is unnecessary, at least for me. I don't play anything that needs that much gain. I wish the footswitch was smaller. Can the channels be switched with regular on/off switches via the jacks in the back panel, anyone know? I like the first and second channel a lot. And my pedals sound decent that way.
Mesa Boogie Mark IVa
Musicman 210 HD 130
2 Epiphone Sheraton II's historic spec pots
upgraded shielded wire vintage Gibson pups
RotoVibe two modded Ibanez TS9D's
Danelectro Chours Boss Harmonist Boss DD5 Delay
Morpheous Bomber Boss Loop Station

Tuna141
Mark III
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Location: MA
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Re: Mark IV Crazy Cool!

Post by Tuna141 » Mon Jun 09, 2014 11:13 am

Yup. You can use simple on/off footswitches with the jacks on the back in order to switch the channels, turn EQ on/off, etc.

mysterblues
Mark I
Posts: 33
Joined: Tue Feb 11, 2014 4:21 pm

Re: Mark IV Crazy Cool!

Post by mysterblues » Mon Jun 09, 2014 3:02 pm

Tuna141 wrote:Yup. You can use simple on/off footswitches with the jacks on the back in order to switch the channels, turn EQ on/off, etc.


Thanks Tuna! Where in Mass? I grew up in Worcester
Mesa Boogie Mark IVa
Musicman 210 HD 130
2 Epiphone Sheraton II's historic spec pots
upgraded shielded wire vintage Gibson pups
RotoVibe two modded Ibanez TS9D's
Danelectro Chours Boss Harmonist Boss DD5 Delay
Morpheous Bomber Boss Loop Station

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fretout
Mark III
Posts: 247
Joined: Tue Mar 10, 2009 7:13 pm

Re: Mark IV Crazy Cool!

Post by fretout » Thu Jun 12, 2014 1:05 pm

Tuna141 wrote:Yup. You can use simple on/off footswitches with the jacks on the back in order to switch the channels, turn EQ on/off, etc.
Just make sure you set your channel select dial to EXTERNAL SWITCHES if you go that route!
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