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WIGGLING 'LITE' IN GUEST MODE

VCFive multimode filter
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2, 3  Next [all]
Author VCFive multimode filter
Modulart_JP
Some people compared my clone of the System-100 filter and the clone of the SH5 filter that Roland made for their System-500.
The comparison makes sense since the System-100 filter is basically the LP section of the SH5 filter.
And they all told me that my clone sounds more vintage, the Roland's sounds more "modern".
So, I thought it might be interesting to make my version of the SH5 filter.

Here it is:




PCB's, front panels & assembled modules available in my shop.

BOM available for download on the PCB page.
For the calibration, please refer to the SH5 service manual.
diode_destroyer
Nice! Ordered.
Modulart_JP
thumbs up
Hope you'll enjoy it.
MuffLuff
SH5 Filter is the one, great work! Also love the BP on the original!
Modulart_JP
Thank you to everyone who placed order.
I received so many at once, there might be a slight delay in the shipping of your orders.
Maybe a couple of days more than usual.
Please be patient...
we're not worthy
Jarno
THAT300 and 2x LM394? Why not go for either 4x LM394 or 2x THAT300? (and maybe a single LM13700 rather than 2x3080?)

Looks great though!
Modulart_JP
Jarno wrote:
THAT300 and 2x LM394? Why not go for either 4x LM394 or 2x THAT300? (and maybe a single LM13700 rather than 2x3080?)

Just to bother people...
hihi
Modulart_JP
Black panels too available.




Build notes available for download on the PCB's page.
It shows how to replace the AS394's with 2x matched 2N3904's.
It works well but it changes the character of the filter...
spillane
Looks awesome, Is there an audio/video sample for this?
Modulart_JP
No.
Maybe in the future...
Dead Banana
basicbasic
Would you ever consider adding Paypal as a payment option?
Jarno
Modulart_JP wrote:
Jarno wrote:
THAT300 and 2x LM394? Why not go for either 4x LM394 or 2x THAT300? (and maybe a single LM13700 rather than 2x3080?)

Just to bother people...
hihi


LOL, yeah, that'll teach them to DIY grin
Modulart_JP
basicbasic wrote:
Would you ever consider adding Paypal as a payment option?

Paypal is available as a payment option in the shop.

Quote:
LOL, yeah, that'll teach them to DIY grin

thumbs up
But...seriously making that kind of choice in the components used (even tough it may seem odd at times) is what makes the difference, the key to the extra details.
When I prototyped the SYS-100 VCF then the VCFive, I tried different options and if I ended up with that choice of components it's because I thought the result sounded the best...at least to me.
muffdiver
Anyone have a good part number / source for the 100KC Dual-Gang Pot?

Looking at the board, it seems like this should be right angle. Can't seem to find right angle 100KC anti-log dual gang pots anywhere.
Modulart_JP
If you are in the US:
http://smallbear-electronics.mybigcommerce.com/alpha-dual-gang-16mm-so lder-terminals-100k-rev-audio/

If you are in EUR:
https://www.musikding.de/Alpha-Potentiometer-16mm-Stereo-100k-rev-log_ 1
muffdiver
Anyone have a reference pic of a finished build?
devinw1
Ordered a PCB set and black panel. This looks like a cool build!
Modulart_JP
muffdiver wrote:
Anyone have a reference pic of a finished build?

Why do you need one ?
Are you in trouble ?
muffdiver
Powered on and got some led activity then went dead. Thinking either Cap polarity (was tough to tell on PCB) or LED resistor value....I used 27k for some blue LEDs I had laying around.

Hoping I didn’t blow the SMT ICs.
Modulart_JP
Uploading pictures of your build would be more helpful than someone posting a reference picture.
Or if you prefer send me the pictures of your build privately via my shop.
Prunesquallor
spillane wrote:
Looks awesome, Is there an audio/video sample for this?


+1
muffdiver
@Modulart_JP Thanks for taking a look!





[/u]
Modulart_JP
From your pictures, it's hard to tell.
Higher resolution pictures would be better.
One thing though is you are using LM394's instead of AS394's.
LM's are obsolete and very hard to source.
If you got yours from Ebay or suppliers in Hong Kong, chances are that they are fake.
Also, could you tell more about the behavior of the module ?
You said there was some LED activity when you powered it up then nothing.
But is it only the LED's that are dead ?
Do you get any sound out of the filter ?

Quote:
Looks awesome, Is there an audio/video sample for this?

Someone posted a demo on Youtube:
muffdiver
Modulart_JP wrote:
From your pictures, it's hard to tell.
Higher resolution pictures would be better.
One thing though is you are using LM394's instead of AS394's.
LM's are obsolete and very hard to source.
If you got yours from Ebay or suppliers in Hong Kong, chances are that they are fake.
Also, could you tell more about the behavior of the module ?
You said there was some LED activity when you powered it up then nothing.
But is it only the LED's that are dead ?
Do you get any sound out of the filter ?


Regarding the XX394. I had originally got AS394s but the PINs did not match. They were 8-pin instead of 6-pin (see photo). I did indeed get the LM394 from ebay from here:

https://www.ebay.com/itm/2Pcs-LM394H-LM394-Transistor-Nsc-US-Stock-i/1 32711163315?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

If you think it is likely an issue I can try to track down the correct part.

I never got any sound from the module. It did power up for a second though. I've tried to find anything on the board that could have fried, but everything seems in tact.

I'll try sending you the original resolution files of the pics.



basicbasic
Check the data sheet for the AS394 - two of the pins are not connected so you can bend them out of the way or snip them off. You can also use 2 correctly oriented 2n3904s in place of it.
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