What switches do you need to use for the Gt-2 to change mic placement etc?
Do you need dp3t switches? with On-on-on? Want to use toggle switches Don't want to use rotary for space reasons.
You do need DP3T switches. I don't know of any toggle switches commonly available but Jaycar has the SS-0832 Slide and Dick Smith has the P7614. Dick Smith claims their switch as M2 screw holes - don't believe it - you need a 1.7mm screw which they don't sell. A 2mm will not fit. The Jaycar mounts at right angles with PCB tabs; to use with Tonepad's annoying layout you'll probably have to make another board you can run hookup wire from.
An earlier thread gave this url http://www.switchesplus.com.au/intro.asp - if you can wade through the annoying IE only interface you might be able to find a toggle switch.
Ta,
think I'll use rotary switches.
Trying to piece together the wiring of the switches, but I woryy about it when I get to it. THanks!
Quote from: mnatsYou do need DP3T switches. I don't know of any toggle switches commonly available but Jaycar has the SS-0832 Slide and Dick Smith has the P7614. Dick Smith claims their switch as M2 screw holes - don't believe it - you need a 1.7mm screw which they don't sell. A 2mm will not fit. The Jaycar mounts at right angles with PCB tabs; to use with Tonepad's annoying layout you'll probably have to make another board you can run hookup wire from.
At least Tonepad is giving layouts for free without asking for anything in return,providing a service to the community,besides being annoyed easily what's your contribution?.
Aharon :o
Quote from: Aharon
At least Tonepad is giving layouts for free without asking for anything in return,providing a service to the community
Aharon :o
I agree. I've built six projects from Tonepad now, personally I think Francisco's layouts are amazing! True works of art.
Quote from: Aharon
At least Tonepad is giving layouts for free without asking for anything in return,providing a service to the community,besides being annoyed easily what's your contribution?.
Aharon :o
In addition to being annoyed easily my recent contribution was a PCB layout of a headphone bass amplifier for another member of this forum:
http://www.diystompboxes.com/sboxforum/viewtopic.php?t=17785&sid=6bc7b07a7f21a0034285187f74cf3389
I also tried to help find some DP3T switches which was the original topic of this thread.
If you wish, I'll stop.
I certainly appreciate another fine aussie's (mnats) contribution to this forum. I sure mnats wasn't dissing Francisco's layouts at all, i 'm thinking the context of "annoying" wasn't In Fp's work, rather in ability in building the Gt-2 particularly the offboard wiring (not looking forward to it...)
Quote from: dubsI sure mnats wasn't dissing Francisco's layouts at all, i 'm thinking the context of "annoying" wasn't In Fp's work, rather in ability in building the Gt-2 particularly the offboard wiring (not looking forward to it...)
Well, yes and no...
I built a GT2 clone based on the tonepad layout and was surprised to find that the pads for switch 1 were located
in between the pads for switch 2 (this has been changed in the latest revision) and that the pad locations did not correspond to the actual physical location of the controls of the original.
I also found, as others have posted, that the completed unit has a tendency to self-oscillate at higher settings.
It's true that the tonepad layouts are a valuable resource for DIYers. But in the case of the SansAmp GT2 it would be a shame to forget the contributions of Jeremy Lujacummins who disassembled and traced the original schematic that no one else could and who originally suggested the use of rail to rail opamps. Later that idea was followed up by Vasiliok and Manolo Dudes who proposed the use of the TLC2262CP device. Tonepad's site has been fairly reticent on the subject.
In the end I decided to start over from scratch and address the things I didn't like about the tonepad layout. It may not be a "True work(s) of art" but the knobs go LEVEL HIGH LOW DRIVE from left to right and the switches go MIC MOD AMP like the original for easy duplication of various settings you can find online. It all fits in a standard sized box. You can crack all the controls to '10' and it doesn't oscillate. And there's that small matter of 36 or so hookup wires that I didn't have to deal with.
(http://www.users.bigpond.com/kmcilwain/images/gt2_controls.jpg)
(http://www.users.bigpond.com/kmcilwain/images/gt2_components.jpg)
Pics look very cool, but are you aware of the fact that the jacks barely stick out far enough to mount them in a box?
And no bypass switch?
Quote from: Arno van der HeijdenPics look very cool, but are you aware of the fact that the jacks barely stick out far enough to mount them in a box?
And no bypass switch?
The jacks stick out just far enough to poke through the sides of my Taiwanese Hammond-style box and allow the plug to fully insert. The circuit board will hold them in place horizontally so they won't require the mounting nuts.
I always thought the bypass switch was superfluous on a box that was meant to emulate a guitar amp. Why would you simulate a guitar amp and then feed it
into one? I've already got a Marshall I'm fairly happy with. Since I intended to use it to record DI guitar I left off the bypass switch. But thanks for noticing.
Did you ever get your Tonepad build working correctly?
QuoteDid you ever get your Tonepad build working correctly?
Yes, it works fine. I'm still busy mounting it in a box, but it takes some time. :? It has all the controls on the right locations anyway.
I would post some pictures of it, but they're on another computer.
Here are some pictures:
(http://www.student.tue.nl/t/a.c.v.d.heijden/01260003b.JPG)
(http://www.student.tue.nl/t/a.c.v.d.heijden/01260005b.JPG)
Image quality leaves to be desired, but it gives a nice impression...
Switches are mounted on a separte pcb and screwed to the enclosure. It took me quite a lot of time to file out the rectangular slots but I'm really satisfied with the results :mrgreen: It fits nicely in the enclosure...
Quote from: mnatsDid you ever get your Tonepad build working correctly?
Yep!. After all the fuss I faced (http://www.pisotones.com/GT2/GT2.htm) I A/B'ed against the original and they sound amazingly the same... even the noise level is equal:
(http://www.pisotones.com/GT2/imgs/los4.jpg) :wink:
These guys sell sp3t and dp3t mini toggle switches: http://www.nkkswitches.com/
Check out the M series switches. Note that you have to add a jumper (sp) or two (dp) to get the correct action on the switch and they are expensive. I got lucky and found three in a discount bin at my local supplier for a reasonable price to use on my GT-2 but it might be worth the price for ease of mounting and small size.
My local place doesn't have any trouble ordering them so they're probably fairly easy to get.