Search found 16 matches

by Irongiant14
Tue Jun 18, 2019 8:21 am
Forum: Modern Era Amps (1991-Present)
Topic: Mark IV FX-Loop... Huh?
Replies: 11
Views: 1387

Re: Mark IV FX-Loop... Huh?

I just want to add to this 11-year-old thread, in case there are other people troubleshooting the mark iv FX loop. For me, the suggestion to just use a patch cable, from the FX’ send to return, confirmed that there was nothing wrong with my effects loop. In my case, I had a few issues: a bad Send ca...
by Irongiant14
Fri Mar 22, 2019 9:06 am
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

I did contact the factory and sent my Mark IV chassis in for repair. The damage was caused by leaked capacitors. Although they were not able to repair it, they were able to replace the main board and I now have my amp back as good as ever! There is life in the ol' Mark IV, after all.Thank you so mu...
by Irongiant14
Wed Jan 16, 2019 9:45 am
Forum: Effects
Topic: Pedalboard Layout Right to Left or Left to Right?
Replies: 3
Views: 1567

Pedalboard Layout Right to Left or Left to Right?

I'm still new to using pedals and so have read some pedal layout guides online. [I know. Danger! :lol: ] The first layout I made for my board had the signal path go from Left to Right, which is how I read and is my default way of thinking about a signal process. Articles from guitar mags suggest a L...
by Irongiant14
Tue Jan 15, 2019 3:23 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

Hi group, I want to follow up and report back on what happened with my Mark IV and also thank everyone who participated in the thread. I did contact the factory and sent my Mark IV chassis in for repair. The damage was caused by leaked capacitors. Although they were not able to repair it, they were ...
by Irongiant14
Mon Oct 22, 2018 3:18 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

What went so wrong that it cannot be fixed? I was getting noise. A blown fuse. I replaced the tubes. Another blown fuse. Then channel 1 cut out. I took it to a repair shop next to Berklee School of Music that was double recommended by my childhood guitar teacher and also a veteran pro musician. The...
by Irongiant14
Mon Oct 22, 2018 3:16 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

Any good amp tech will be able to give your Mark IV a 100,000 mile servicing and make it as reliable as the day it was made for at least another 10 years. With that in mind, there's no reason to walk away from an amp you like. It's not like Mark IVs are high strung sensitive amps that blow transfor...
by Irongiant14
Mon Oct 22, 2018 2:48 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

Not into Mesas anymore, or just looking for something different? I was SO into my Mark IV and had been digging deeper into it than I had ever before. But if I've got to look around for another amp, after so long, I figure it makes sense to hear what's out there. The Triple Crown is interesting beca...
by Irongiant14
Mon Oct 22, 2018 2:36 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Re: Life After a Mark IVb

What went so wrong that it cannot be fixed? I was getting noise. A blown fuse. I replaced the tubes. Another blown fuse. Then channel 1 cut out. I took it to a repair shop next to Berklee School of Music that was double recommended by my childhood guitar teacher and also a veteran pro musician. The...
by Irongiant14
Tue Oct 16, 2018 9:07 pm
Forum: Mark Series
Topic: Life After a Mark IVb
Replies: 12
Views: 2356

Life After a Mark IVb

After 18 years of playing and home recording through a Mark IVb Combo, I've got to get a replacement. I'd go for another Mark IV but worry that they're old and don't want any more headaches. What's the experience of going from a Mark IV to V? I'm thinking of maybe getting either the Mark V 25W or 35...
by Irongiant14
Tue Oct 16, 2018 9:58 am
Forum: Mark Series
Topic: Mark IV Tube Task Chart, Description of tube functions
Replies: 7
Views: 2276

Re: Mark IV Tube Task Chart, Description of tube functions

Thanks Tuna141 & woodbutcher65, for these responses. I did read them at the time but must not have replied.
by Irongiant14
Mon Jun 25, 2018 3:45 pm
Forum: Mark Series
Topic: Mark IV Tube Task Chart, Description of tube functions
Replies: 7
Views: 2276

Re: Mark IV Tube Task Chart, Description of tube functions

Hi Irongiant14, A 12AX7 tube is an 8-pin tube which contains 2 separate triodes. Each triode has 4 pins (one pin each for the heater, anode, cathode and grid) which manipulate the gain of the signal. Since there are two gain stages in each V(#) socket, to be able to distinguish these triodes from e...
by Irongiant14
Tue Jun 19, 2018 10:02 pm
Forum: Mark Series
Topic: Mark IV Tube Task Chart, Description of tube functions
Replies: 7
Views: 2276

Mark IV Tube Task Chart, Description of tube functions

Hi. Can someone please help me understand the "Description of tube functions" on page 17 of the Mark IV Revision B manual? I'm trying to diagnose why my combo is blowing fuses. It's got four new tubes in slots A,B,C,D; they're about 8 months old. None of them glow red hot when I look back there. I c...
by Irongiant14
Tue Jun 19, 2018 9:43 pm
Forum: Mark Series
Topic: How do you store the footswitch on the back of the Mark iv?
Replies: 4
Views: 2399

Re: How do you store the footswitch on the back of the Mark

Thank you so much for taking the time to google and reply! Using your photos I was able to make it fit, like a Tetris master. But now Ive got to find a replacement for the missing ring key. What a weird doodad! I have no idea what to even call that thing. I was able to order the missing ring from M...
by Irongiant14
Fri Mar 10, 2017 12:29 am
Forum: Mark Series
Topic: How do you store the footswitch on the back of the Mark iv?
Replies: 4
Views: 2399

Re: How do you store the footswitch on the back of the Mark

Thank you so much for taking the time to google and reply! Using your photos I was able to make it fit, like a Tetris master. But now Ive got to find a replacement for the missing ring key. What a weird doodad! I have no idea what to even call that thing.