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This is exactly why I replaced my TriAxis/SimulClass 2:90 pre/power combination. Sounded great and was very versatile but holy hell repair was way too expensive. It was actually a really sturdy preamp, I dropped it from 4.5 feet immediately after a repair job and still no damage. I went to a Marshall DSL100H and never looked back. I can bias it myself and it's never had an issue apart from needing new tubes a year or two ago.
Where’s the conclusion video to this repair? I tried finding it on the channel but holy crap there’s tons of videos there and I wasn’t able to find a part 2
you just have to remove the 8 tantalum cap. don't replace them, they are some filtering cap, all the bleeding problems of the channels mode will be resolved. Those bad tantalum leaks more current and the optocoupler component doesn't work correctly(they don't fully open/close) and make bleeding problems on the triaxis channels mode
Anyone know what those cermet trimpots on the boards at 4:49 do? Are those to adjust gain , treble , mid, bass...etc ? A couple are labeled gh, and th too.
@@twelve_string , opto couplers were used in various finicky audiophile hifi equipment back in the 80's and 90's; many of which are no longer available and if they go bad you are s--t out of luck.
@@goodun2974 Some models are no longer available but fortunately the Vactrol 5C9 used for switching are still produced. I have bunch of them. No worry, I can keep my TA to the grave. lol
I think it was one guy that did work with Budda early on but can't remember his name. Long last name maybe started with a Z but can't remember. I think he only helped design the programmable preset part and midi. I remember reading something years ago. But Budda didn't debut until 1995 so I'm not sure.
All personal opinion - sure, a MIDI controlled, programmable all tube analog preamp might not be the most sensible idea ever, and they may just be a tech's nightmare, but I can assure you that playing a Triaxis in stereo into two quad boxes via its matching Stereo 2:90 power amps is an almost visceral experience in tone and volume - is that worth the possible cost and headaches? I dunno, but if I recommence gigging I'll be fighting very hard to resist going back to this stellar sounding rig (and no, I don't play metal).
These were popular back in the early 90's, but all the guys who bought one ended up selling them because they were a one trick pony! & cost a fortune..
That's great you care about the customers repair bill. Some might try to inflate it. lol You have great integrity.
This is exactly why I replaced my TriAxis/SimulClass 2:90 pre/power combination. Sounded great and was very versatile but holy hell repair was way too expensive. It was actually a really sturdy preamp, I dropped it from 4.5 feet immediately after a repair job and still no damage. I went to a Marshall DSL100H and never looked back. I can bias it myself and it's never had an issue apart from needing new tubes a year or two ago.
Most sound issues are related to bad TL072 (IC1 to IC8) , bad tantalum cap (C250 to C257) in the switching matrix or bad 5C9 optocouplers
Where’s the conclusion video to this repair? I tried finding it on the channel but holy crap there’s tons of videos there and I wasn’t able to find a part 2
The Ultimate distortion pre amp. The MESA Tri Axis.
Complicated hot mess good.
you just have to remove the 8 tantalum cap. don't replace them, they are some filtering cap, all the bleeding problems of the channels mode will be resolved. Those bad tantalum leaks more current and the optocoupler component doesn't work correctly(they don't fully open/close) and make bleeding problems on the triaxis channels mode
Fixed a few. Horrible documentation . Check the flatcable connectors. Some times needs reflow
Anyone know what those cermet trimpots on the boards at 4:49 do? Are those to adjust gain , treble , mid, bass...etc ? A couple are labeled gh, and th too.
triaxis calibration procedure, there are some fixed rules to use them. Don't set by ears.
OMG, that a pretty complex for a preamp. This is propably cool piece of gear but should it fail, it can get expensive to get it fixed.
no tubes in the "all tube" preamp ?
It has lots of preamp tubes. But most of the real estate is MIDI switching stuff.
Vactrols! We must have more vactrols!
If you mean optocouplers, yes. Mostly those used for switching (5C9)
@@twelve_string , opto couplers were used in various finicky audiophile hifi equipment back in the 80's and 90's; many of which are no longer available and if they go bad you are s--t out of luck.
@@goodun2974
Some models are no longer available but fortunately the Vactrol 5C9 used for switching are still produced. I have bunch of them. No worry, I can keep my TA to the grave. lol
Rumor has it that while the preamp was designed by MB, the switching was handed off to the Budda guys. Can anyone squash this?
I think it was one guy that did work with Budda early on but can't remember his name. Long last name maybe started with a Z but can't remember. I think he only helped design the programmable preset part and midi. I remember reading something years ago. But Budda didn't debut until 1995 so I'm not sure.
@@HiHello-ku1fl Thanks for the reply and somewhat confirmation.
Messy Boogers,,,,, I never heard one I liked! Way back when they were hot rodded princetons they were good but,,,,,,,
Totally agree!
All personal opinion - sure, a MIDI controlled, programmable all tube analog preamp might not be the most sensible idea ever, and they may just be a tech's nightmare, but I can assure you that playing a Triaxis in stereo into two quad boxes via its matching Stereo 2:90 power amps is an almost visceral experience in tone and volume - is that worth the possible cost and headaches? I dunno, but if I recommence gigging I'll be fighting very hard to resist going back to this stellar sounding rig (and no, I don't play metal).
Lyle why would you do that to yourself!
These were popular back in the early 90's, but all the guys who bought one ended up selling them because they were a one trick pony! & cost a fortune..
What a mess, looks like an old VCR, total junk.