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 Forum index » DIY Hardware and Software
[Order] Roland 100M Filter - fabbed PCBs and panels
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frequencycentral



Joined: May 25, 2008
Posts: 186
Location: UK

PostPosted: Wed Apr 24, 2013 6:14 pm    Post subject: [Order] Roland 100M Filter - fabbed PCBs and panels Reply with quote  Mark this post and the followings unread

I've switched this project to fabbed PCBs and panels! PCBs are now it stock. I've also changed the design from CA3080 (getting hard to find goodn's) to LM13700 but retained the original FET buffers for maximum authenticity. Panels are on order and should arrive within 4 weeks. The panels are 10HP and are basically the same as shown below, with the exception that the 'Frequency Central' logo will be in mirror image.

If you want just a PCB or two you can order now they'll be shipped right out.

If you want PCB + panel you can order now but please allow about 5 weeks for delivery.

System X Filter PCB: £15 GBP
System X Filter panel: £15 GBP

Shipping:
Please add £3 GBP if you're outside Europe.

Paypal to:

payments(AT)frequencycentral.co.uk

....don't forget to replace the (AT) with @

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Soundclips:

First, da whole System X Voice, Used a combination of sawtooth and PWM'd square to the VCF, triangle direct to the VCA. Bit O'Twiddlin going on...:

http://www.frequencycentral.co.uk/wp-content/uploads/2013/02/AssaultAndBattery.mp3

Next, Francesco's soundclip which he's kindlt allowed me to post:

http://francescopoggianti.bandcamp.com/track/roland-system100m-vcf-diy-demo-bassline1

Now, classic 24dB/oct LPF. The two VCOs are my Hearn Morley HMVCO1c, there is a little -1oct subosc added as FM of the VCF towards the end of the clip:

http://www.frequencycentral.co.uk/wp-content/uploads/2012/07/Roland-121-24dB-LPF.mp3

Next, my 'hot-rodded' 12dB/oct LPF output, again a touch of subosc FM towards the end:

http://www.frequencycentral.co.uk/wp-content/uploads/2012/07/Roland-121-12dB-LPF.mp3

Finally, by mixing both 12dB/oct and 24dB/oct outputs in equal amount we have the bandpass mode:

http://www.frequencycentral.co.uk/wp-content/uploads/2012/07/Roland-121-Bandpass.mp3

Used a combination of sawtooth and PWM'd square to the VCF, triangle direct to the VCA. Bit O'Twiddlin going on...

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