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Author Topic: "Roland Blues Cube" schematic wanted...  (Read 386 times)

stratitis

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"Roland Blues Cube" schematic wanted...
« on: April 25, 2020, 02:15:52 PM »
Can somebody help me finding "Roland Blues Cube Hot" schematic?

(PS: Sorry for the confusion and my extensive editing my postings. I did not know the "Hot" is a DSP modeling amp, I'm looking for the old all-analog - non-DSP version)
« Last Edit: April 28, 2020, 05:12:33 PM by stratitis »

joecool85

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Re: "Roland Blues Cube Hot" schematic wanted...
« Reply #1 on: April 26, 2020, 08:46:08 PM »
Can somebody help me finding "Roland Blues Cube Hot" schematic?

I'm thinking it unlikely you'll find this schematic, I've not seen it, that's for sure.  Are you repairing one, or looking to make a clone?
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Still rockin' the Dean Markley K-20X
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stratitis

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Re: "Roland Blues Cube" schematic wanted...
« Reply #2 on: April 27, 2020, 02:29:20 PM »
I want to analyze the schematics to understand the Roland "Tube Logic" technology.
I randomly found an used equipment offer of that amp (i never heard of it before) but the reviews I found were not too bad...
https://www.soundonsound.com/reviews/roland-blues-cube-hot-british-el84-modified
https://translate.google.de/translate?hl=de&tab=wT&sl=auto&tl=en&u=https%3A%2F%2Fwww.bonedo.de%2Fartikel%2Feinzelansicht%2Froland-blues-cube-hot-test.html
« Last Edit: April 28, 2020, 05:16:30 PM by stratitis »

Jazz P Bass

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Re: "Roland Blues Cube Hot" schematic wanted...
« Reply #3 on: April 27, 2020, 07:42:45 PM »
"Tube Logic – a marriage of solid-state analog technology and DSP"

Not too sure how the schematic will reveal the true nature.

joecool85

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Re: "Roland Blues Cube Hot" schematic wanted...
« Reply #4 on: April 28, 2020, 08:16:32 AM »
"Tube Logic – a marriage of solid-state analog technology and DSP"

Not too sure how the schematic will reveal the true nature.

Sounds like they're running an analog opamp into a DSP circuit lol.
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stratitis

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Re: "Roland Blues Cube" schematic wanted...
« Reply #5 on: April 28, 2020, 11:09:35 AM »
Obviously there are DSP (about 2014) and non-DSP versions (about 1996)

I'm interested in the non-DSP.
(user manual BC-30: https://static.roland.com/assets/media/pdf/BC-30_30-210_OM.pdf )

"This Vox-inspired special edition of Roland’s analogue modelling amp is equally impressive at home, on stage or in the studio." [edit: this is a DSP version] ( https://www.soundonsound.com/reviews/roland-blues-cube-hot-british-el84-modified ).

That's what I've found:
https://www.vguitarforums.com/smf/index.php?topic=11865.0
There's a schematic of the Blues Cube 30 (no DSP, no reverb, no USB, no power control switch):


Better quality service manual (including schematics):
http://www.synfo.nl/servicemanuals/Roland/BC-30_BC-60_SERVICE_NOTES.pdf

Power amplifier uPC1188H:

http://www.electronica.ro/audio/uPC1188H.shtml
https://translate.google.com/translate?hl=de&sl=ru&tl=en&u=http%3A%2F%2Fradiostorage.net%2F3404-mikroskhema-upc1188h-usilitel-nizkoj-chastoty-18watt-pri-22v.html

Q1,2,8,9,10,11 (amplifier stages):
2SK184, N channel J-FET
https://alltransistors.com/pdfdatasheet_toshiba/2sk184.pdf

Q3,6,7,13,14, 19(?) (signal switches, tone stack output impedance converter):
2SK246, N channel J-FET
https://alltransistors.com/pdfdatasheet_toshiba/2sk246.pdf

Q15,16 (tone stack driver):
2SK363, N channel J-FET
https://alltransistors.com/pdfdatasheet_toshiba/2sk363.pdf

« Last Edit: April 30, 2020, 05:56:42 PM by stratitis »