The indecent view of the Gt-Pro

[piing]

I couldn't wait to do it :twisted:
http://www.lohengrinaudio.com/GTPro/NakedGT.JPG
It' plenty of room inside! I think the only reason to use a 2U rack is to have a nice front pannel.

[petracci]

My eyes! My eyes!!!! :D

My old GX700 would nicely fit in there....

[ASHJN]

Damn thats bullshit I wish it was a 1U piece instead

[piing]

If you have a close look to the PCB you'll see that it could be possible to make it even smaller, but I don't see the advantage. The only thing that they could have easily done is to fit it into a 1U rack space.

The Eventide Eclipse, one of the most advanced sound processors available ot there, is built into a 1U rackspace.

http://www.eventide.com/eclipse/eclipse.htm

But, on the other side, it's not a bad idea to have all functions easily available from the front panel, just in case you don't have a computer to use the software.

[PurpleFlame]

Mabe they choose this size because of the LINE6 XT PRo... But I like it: All functions easily on the front, the good-old knobs... much better than my VF1

[Guitarreverend]

I can't find the tube! 8)
My guess is that the gt-pro is 2U because of the user interface on the front and all the inputs / outputs on the back. You've gotta put them somewhere!

[Fubbe]

hey pingfloid.
how does the amp-control work?
I don't hear the click of switching relais when I activate it...

I plan to power some devices when amp-control is activated.
so I'll run 12 Volts through the jack.

If they work based on electronic semiconductors, they could be damaged!? :?:

Thx, Fubbe.

[piing]

If they work based on electronic semiconductors, they could be damaged!?
That's a very good question! :idea:

They don't mention the voltage/current at the specs, and there's no sound of relay. Anyway, wathever amp is to be controlled, there's always a voltage to cut. 12V doesn't look too much. Do you know what current in mA you will need to cut?

This weekend I'll open it to replace the tubes, so I'll have a look :lol:

[Fubbe]

Do you know what current in mA you will need to cut?
No, I can't say yet! but I think 12 Volts will be enough...


This weekend I'll open it to replace the tubes, so I'll have a look
Thx man! I'm curious about it. :o

[ned78]

DO NOT attempt to power anything through the amp control sockets. Yes, it will provide 12 volts, but at relay switch currents. Think 50 mA! All these are designed to do is toggle relays inside your amp, the relays feed the real power. You know what? You could probably power something alright, and then a few hours later - pop. Don't say you weren't warned - I did a lot of work on Relays and Optically Coupled Triacs (Which the GT-Pro probably uses) for my final year electronics project!

[Fubbe]

ok, I won`t do it. I don't want to risk anything... :(

thanks for your warning.

[rocketmorton52]

I would like to add my own small jack on the back of my pro to feed power to my fc-200.Does anyone know if there is a 9 volts source somewhere inside the pro to connect this to.I know it uses AC but is then probobly stepped down to a lower voltage but not sure if it is converted to DC or not.Thanks.With all the room in there I may just add a small transformer in there somewhere.Any thoughts on this?

[Evilution]

I would like to add my own small jack on the back of my pro to feed power to my fc-200.Does anyone know if there is a 9 volts source somewhere inside the pro to connect this to.I know it uses AC but is then probobly stepped down to a lower voltage but not sure if it is converted to DC or not.Thanks.With all the room in there I may just add a small transformer in there somewhere.Any thoughts on this?

As an experienced service engineer i would STRONGLY advice against doing this for several reasons,

1. It would DEFINATELY void your warranty
2. You may not even be able to get it repaired by Roland/Boss after even if you are willing to pay for it,and since this is a much more complicated device than an analog amp you may not find an alternative to repairing it at Roland/Boss.
3. If you dont know exactly what youre doing you may "fry" the unit.

This is my experience working at among other things an licenced service center for one of the biggest cell phone manufacturers,and judgeing whats warranty or not.

If there even was sign that the phone had been opened it may have voided the warranty ,so i definately dont recommend that you even open it up,and if you do be real sure not to leave any signs of it.

If you want to phantompower your midipedal,make an external box or cable that you connect in between the Pro and the midipedal where you can connect the power source and let it feed the pedal through the midi cord,thats what i would do.

Even i wouldnt even open a device like the Pro if its under warranty unless it was absolutely necessary,and ive worked in eletronics proffesionally for 18 years now.

Have fun with the Pro dont destroy it,its such an exellent tool.

[glennfin]

I've been working in electronics now for over 25 years (shows my age! 8O ) and I agree with Evilution. The internal power supply was designed to provide the current required by the GT-pro's PC boards. Not a good idea to tax it further! :oops:

Nice photo of the guts!.... I'm very glad they made it a 2 rack space unit!
If it was a single rack space, everyone would be complaining about all the button pushing and menu changing they'd have to do to program it vs the nice layout they went with!

As someone mentioned, you can run 12v from an external source through the control jacks, it just depends on how much current the device (relay) you're switching draws...small relays should be no problem.

The GT-pro pro probably uses either simple transistors for switching or maybe solid state relays.

I'd love to see a schematic!!... but I'm sure that's top secret!! :roll:

[ASHJN]

If the FC-200 has a 7-pin MIDI connector than you can just get the cable that Rocktron makes that coverters 5pin MIDI and power into 7 pin MIDI for powering your floorboard

[Fubbe]

good idea.
I think I'll give it a try! 8)
(Someday)