EHX - Riddle QBalls VCF

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EHX - Riddle QBalls VCF

Postby uncleboko » 25 Oct 2011, 15:56

Any clues as to whether an OTA or opamp VCF is used?
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Re: EH Riddle QBalls VCF

Postby uncleboko » 26 Oct 2011, 07:56

And any guesses as to how tthe envelope generator is made up - it does sound very very good, and the slow sweep sounds as smooth as the Space Drum decay :D
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Re: EH Riddle QBalls VCF

Postby uncleboko » 28 Oct 2011, 07:49

Maybe something will surface eventually.
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Re: EH Riddle QBalls VCF

Postby uncleboko » 29 Oct 2011, 14:02

A youtube to circuit diagram function might be useful :cry:
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Re: EH Riddle QBalls VCF

Postby uncleboko » 09 Nov 2011, 16:21

A blank!
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Re: EH Riddle QBalls VCF

Postby uncleboko » 10 Nov 2011, 11:47

I'm wondering if they use a new in house IC for the VCF or whether a stash of CA3094s has been uncovered :hmmm:
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Re: EH Riddle QBalls VCF

Postby uncleboko » 11 Nov 2011, 13:57

uncleboko wrote:I'm wondering if they use a new in house IC for the VCF or whether a stash of CA3094s has been uncovered :hmmm:



:hmmm: :hmmm: :hmmm:
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Re: EH Riddle QBalls VCF

Postby R.G. » 12 Nov 2011, 22:40

The LM13600, LM13700, CA3280, and NE5517 are all closely equivalent in function to two CA3094s in a single DIP. There are differences in the Iabc input and the pre-distortion diodes as well as lower overall noise. Takes a bit of circuit adaptation, but not much.

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Re: EH Riddle QBalls VCF

Postby uncleboko » 15 Nov 2011, 16:04

R.G. wrote:The LM13600, LM13700, CA3280, and NE5517 are all closely equivalent in function to two CA3094s in a single DIP. There are differences in the Iabc input and the pre-distortion diodes as well as lower overall noise. Takes a bit of circuit adaptation, but not much.


This really is a riddle :lol: :lol: :lol:
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Re: EH Riddle QBalls VCF

Postby earthtonesaudio » 15 Nov 2011, 17:00

Is there some reason to assume this is an analog pedal?
rocklander wrote:hairsplitting and semantics aren't exactly the same thing though.. we may need two contests for that.
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Re: EH Riddle QBalls VCF

Postby uncleboko » 15 Nov 2011, 17:31

Because it sounds analog.
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Re: EH Riddle QBalls VCF

Postby Scruffie » 15 Nov 2011, 17:40

Quick Specs
80 Hz to 5 kHz frequency response tailored for guitar
Optional expression pedal control
Fully-analog circuit
Switch selectable analog distortion designed for guitar
Start and Stop sweep control
Low Pass, Band Pass, High Pass filter select
Start and Stop for filter sweep and Q control
Separate Dry and Effect outputs
9.6VDC 200mA power supply included


So yeah, it is analog.

LM13700 Based Envelope Filter I guess, they seem to use them alot now... no clue about the detection.
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Re: EH Riddle QBalls VCF

Postby uncleboko » 15 Nov 2011, 19:34

How are they doing the start & stop frequency envelope generator I wonder?
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Re: EH Riddle QBalls VCF

Postby earthtonesaudio » 16 Nov 2011, 01:45

Scruffie wrote:So yeah, it is analog.

LM13700 Based Envelope Filter I guess, they seem to use them alot now... no clue about the detection.


Aha! I didn't scroll down enough on the EHX page, obviously. :slap:
rocklander wrote:hairsplitting and semantics aren't exactly the same thing though.. we may need two contests for that.
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Re: EH Riddle QBalls VCF

Postby Scruffie » 16 Nov 2011, 01:51

earthtonesaudio wrote:
Scruffie wrote:So yeah, it is analog.

LM13700 Based Envelope Filter I guess, they seem to use them alot now... no clue about the detection.


Aha! I didn't scroll down enough on the EHX page, obviously. :slap:

Haha, I assumed it was digital myself, I just happened to catch that in the specs.

Easily done.
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Re: EH Riddle QBalls VCF

Postby Ice-9 » 16 Nov 2011, 12:23

Could be a clue in this picture.

Image
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: EH Riddle QBalls VCF

Postby uncleboko » 16 Nov 2011, 12:27

Am I seeing + and - 9v at the top?
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Re: EH Riddle QBalls VCF

Postby Ice-9 » 16 Nov 2011, 13:24

uncleboko wrote:Am I seeing + and - 9v at the top?


No it looks more like 9v centre negative logo to me.
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: EHX - Riddle QBalls VCF

Postby uncleboko » 08 Sep 2016, 17:14

Amazing that no circuit has surfaced after all this time!
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Re: EHX - Riddle QBalls VCF

Postby Ice-9 » 09 Sep 2016, 22:40

uncleboko wrote:Amazing that no circuit has surfaced after all this time!



Did you not see my post above where I circled in black a clue. :secret:
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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