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I would follow the variac startup procedure described here:

https://robrobinette.com/Tube_Amp_Startup.htm

... Without the light bulb, your amp shouldn't have a shortage.

Do I get it right? You live in a 110 volt region now and want to run a 220 volt amp there? Also... How could you forget a recto in a storage place?

The documentation (and source code) is growing, so here is the link for the complete folder (many documents still in progress, but the build doc will be good enough to build your own by the end of the week)!

Sneak preview to the build instructions is here. 29 pages already, including many pictures, still some work to do!

Where is the link to the code?

https://drive.google.com/folderview?id=0B5vtgOg9bRJjVGlIVDZxUUxfSDA

Great work!
I'm at the beginning of a similar project, will probably steal some of your ideas

Sure, go ahead! If it is arduino-based, you can get my code as well (open source). Start a thread about your project, after Eoo3 kept me busy for almost half a year now, I want to see other's people blood, sweat and tears ;-)

[25,- EUR]

Updated Post as I ran out of enclosures AND German Post changed their conditions:


PCBs:
The set of 6 PCB's for the looper will include:
- 15 Jack PCBs (on a v-slotted board, you only need 8 of them)
- 8 Loop Button PCBs (on a v-slotted board, you need all 8 of them)
- 10 Preset Button PCBs (on a v-slotted board, you only need 7 of them)
- 1 Control Board (for the Arduino Nano, the Shift registers, the Power connection, Midi in and out and the Button connections)
- 1 Spillover Board (for Amp Switching and Spillover Loops seven and eight)
- 1 Relay Board (for the Input Buffer, Loops 1-6, send/return)
- 12 Distance rings for the PCBs
25,- EUR

Shipping and packaging (EU): 5€
Shipping and packaging (Non-EU): 9€

If you want to get one set, here is the link to the preorder-thread: http://www.madbeanpedals.com/forum/index.php?topic=29576.msg286399#msg286399

I'll go thru my paperwork.  It was a lot of detective work and it was sold as wire channel for high end modular furniture.  Cost me a fortune but is very cool.  I suspect if a bunch of us bought it the price might be more reasonable.

Gordo... Did you find your source for the cable channel? I would include that in the documentation, if possible...

Thanks!

I definitely will grab a set of the Eoo3 boards!...i noticed the 5v relays used are different from Linda.

Correct... No specific reason for that, though. I use these smaller relays in small enclosures and they save some space on these PCBs as well. They aren't more pricey, so I use these for the Eoo3 now.

Nothing but good news today:

The new relay board arrived and it's working perfectly:



While soldering it in, I discovered a cold solder joint in the mute-while-switching-block. Fixed it, now there is only a little, totally acceptable pop noise when switching EVEN IN SPILLOVER MODE in loops 7 and 8.

So, it's almost done. I would love to add a mute function for tuning to one of the loop buttons (activated when held down, deactivated with another press). Also have to write the documentation, which will not only be a build guide, but also a user guide.

For those keen on boards, I can promise you, that the boards (a set of 6 boards for one looper) will be up for sale latest on 20th of April. I will let you know in this thread.

Seems like I will need to build a smaller board. Power supply (top right), patchbox (top left) and the separate power supply for the HX stomp (9V, 3 A is too much for the palmer power brick) will go below the Helicon, the King of tone and the HX...



Still waiting for the Relay PCBs and writing on documentation.

Looks great, Lee, as always. I agree, my Looper will be more complicated to build, larger and requires a manual for the initial setup, if you want to change the midi configuration. Brenja brought up the idea to use CC messages for all kinds of midi control within a patch, I guess that's one of the main differences...

Anyway, again a great approach to use 3d printing in stompbox building. May I ask what kind of labels you use and where you get those? Doesn't look like waterside decals...

The decals came from the same guy who did the vinyl decals for the Space Race build. He could easily make you decals for your looper. His name is Forest Dukes. His website isn't the best but you can contact him. He can do graphics up to like 5 feet wide and he can do all of the cutouts you need.  https://www.dukesdecals.com/collections/decals-stickers

Great! I will look for similar services in Germany, it's a nice idea! Mind telling us how much you paid for the three labels?

Looks great, Lee, as always. I agree, my Looper will be more complicated to build, larger and requires a manual for the initial setup, if you want to change the midi configuration. Brenja brought up the idea to use CC messages for all kinds of midi control within a patch, I guess that's one of the main differences...

Anyway, again a great approach to use 3d printing in stompbox building. May I ask what kind of labels you use and where you get those? Doesn't look like waterside decals...

The best part of any project is always THIS:

I'm totally on board with this.  I was the only guitar player this weekend and had to jump in and out of delayed lead parts and rhythm parts with corresponding channel changes and tails (similar problem to playing the Limelight solo by Rush with one guitar) and brought the possibilities of this project front and center.  My setup is usually dead simple (although I use an fx loop and channel switching) but would be nice to be able to automate.

I feel your pain, seems like we have similar setups. I usually get away with few effects (boost, drive, chorus, delay, reverb) an I never seem to change their pots. I need amp channel switching, though. And I also need the fx loop for the time based effects. I usually get away with 6-7 sounds for a show, so one bank might indeed be enough for me. I will use the other banks for other environments (acoustic guitar, recording just with my HX stomp, using another amp ...).

For the spillover, I have some not so good news. It's not as bad as it sounds, but is something worth knowing before starting to work on this.