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Author Topic: Tube FX-Loop AKA D*mblelator  (Read 11560 times)
erwin_ve
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« on: December 28, 2008, 02:15:54 PM »
Since may 08 I am the happy owner of a Ceriatone Ots. After some serious modding of this amp I had one big desire; a tube fx-loop aka d*mblelator.

1 1/2 month ago I tried one of a ampgarageboard-member who's living in the Netherlands. It was such a nice experience, the d-lator added nice harmonics, compression and makes the od sound real sweet.

So I decided to build one myself. Sourcing parts was time consuming.
I finished it at Christmas eve and gigged it this weekend. It's really nice, also without effects! Tomorrow the lettering is done.
Here some building pics:











After drilling some holes:
« Last Edit: December 28, 2008, 02:17:30 PM by erwin_ve » Logged
hywelg
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« Reply #1 on: December 28, 2008, 03:43:29 PM »
Nice job, have you used a 12ax7 or other less gainy valve?.

I half wish I had held off doing my Klein based rack mount job. I rather like the idea of a tube based effects loop. Would appreciate your comparison with the Kleinulator if at all possible.

Any chance of a layout drawing?
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erwin_ve
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« Reply #2 on: December 28, 2008, 03:57:27 PM »
Quote from: hywelg on December 28, 2008, 03:43:29 PM
Nice job, have you used a 12ax7 or other less gainy valve?.

I half wish I had held off doing my Klein based rack mount job. I rather like the idea of a tube based effects loop. Would appreciate your comparison with the Kleinulator if at all possible.

Any chance of a layout drawing?



Thnx! I used a 12ax7, with the right voltages there's plenty of headroom.

Unfortunatly I desoldered my kleinulator to use some parts of it in this build Tongue
I think it's not fair to compare it because I made a Kleinulator early public domain version and that's a bit different from the build I've seen lately.

For a layout of a d-lator you can visit ampgarage; a member(Funk) made a tutorial. I'm thankful for that otherwise I didn't start the build.

The only difference is the power supply which is using a bridge rectifier instead of a voltage doubler. I'll attach a schematic of that.

* Fx_loop_PS.jpg (73.84 KB, 800x301 - viewed 875 times.)
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Thilo278
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« Reply #3 on: December 28, 2008, 04:21:11 PM »
Nice!

How much did the whole build cost?
I need a Dumbleator, too  Grin
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hywelg
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« Reply #4 on: December 28, 2008, 04:37:19 PM »
Just read that thread on ampgarage http://ampgarage.com/forum/viewtopic.php?t=3944&postdays=0&postorder=asc&start=0

I reckon my electronics knowledge is inadequate to try building my own!! You had to do quite a bit of parts swapping to get the right voltages in the right places.
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erwin_ve
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« Reply #5 on: December 28, 2008, 04:48:47 PM »
Quote from: hywelg on December 28, 2008, 04:37:19 PM
Just read that thread on ampgarage http://ampgarage.com/forum/viewtopic.php?t=3944&postdays=0&postorder=asc&start=0

I reckon my electronics knowledge is inadequate to try building my own!! You had to do quite a bit of parts swapping to get the right voltages in the right places.
You better look at: http://ampgarage.com/forum/viewtopic.php?t=4084&start=0&postdays=0&postorder=asc&highlight=
The EU power design isn't mine; it's done by a member of ampgarage(Airniles).
Swapping isn't the right method, you have to calculate this; Ohm's law is your friend. To recover triode=345v; to cathode triode= 268v
« Last Edit: December 30, 2008, 11:48:56 AM by erwin_ve » Logged
erwin_ve
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« Reply #6 on: December 28, 2008, 04:52:09 PM »
Quote from: Thilo278 on December 28, 2008, 04:21:11 PM
Nice!

How much did the whole build cost?
I need a Dumbleator, too  Grin

Priceless Chair Dance Cheesy
Somewhere between €150- €200. Don't know exactly, had some parts in stock.
The empty rack was the most expensive part, then the tranny.
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Thilo278
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« Reply #7 on: December 28, 2008, 05:14:28 PM »
Sounds great  Grin

Maybe I'll try to build one Smiley
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erwin_ve
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« Reply #8 on: December 29, 2008, 08:42:35 PM »
Today finished the lettering!

* compleet2.jpg (129.59 KB, 814x184 - viewed 833 times.)

* compleet3.jpg (188.73 KB, 988x216 - viewed 762 times.)
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Steven_nl
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« Reply #9 on: December 30, 2008, 03:50:40 PM »
hi Erwin
looks great
my Kleinulator is up and running again. I'll come by one of these days so we can compare.
Cheers
Steven
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hywelg
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« Reply #10 on: December 30, 2008, 03:57:57 PM »
Looking forward to reading that comparison.
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erwin_ve
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« Reply #11 on: December 30, 2008, 05:16:04 PM »
Quote from: Steven_nl on December 30, 2008, 03:50:40 PM
hi Erwin
looks great
my Kleinulator is up and running again. I'll come by one of these days so we can compare.
Cheers
Steven

Hi Steven,

Looking forward to that!
I'll make some fresh coffee with oliebollen.

cheers,

Erwin
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jezzbo
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« Reply #12 on: December 31, 2008, 09:59:08 AM »
Hey Steven and Erwin,

Keep us informed will ya?
thanks

Jesse
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Steven_nl
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« Reply #13 on: December 31, 2008, 10:43:28 AM »
Hi Guys
I need to wait on a couple of new FET's. Mine blew. I had the unit repaired but not with the same parts. Mike was kind enough to offer to send me a few so I'll put those in and then I'll meet with Erwin for an A/B.
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mcinku
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« Reply #14 on: January 02, 2009, 09:04:31 PM »
can't wait to read your review
 Wink
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