[sdiy] Behringer Model D PCB

Vladimir Pantelic vladoman at gmail.com
Tue Feb 20 18:36:35 CET 2018


and as a contrast, try to find the actual synth circuit amidst the sea of 4051s 
and LM13700s here :)

https://www.flickr.com/photos/psychlist1972/sets/72157685399706662/with/36547494363/


On 02/20/2018 04:24 PM, jdelgoulet at free.fr wrote:
> I'm wondering how they cannot get oscillators cross mod without 'isolating' the VCOs power supplies. May be there are 'far' enough since they use SMD components and not thru hole.
> In my clone, I had to do it otherwise it would have been modulation wonderland !
> 
> Julien
> https://guinguin-instruments.ecwid.com/
> 
> ----- Mail original -----
> De: "Richie Burnett" <rburnett at richieburnett.co.uk>
> À: synth-diy at synth-diy.org, "sleepy dog" <sleepy_dog at gmx.de>
> Envoyé: Mardi 20 Février 2018 14:33:43
> Objet: Re: [sdiy] Behringer Model D PCB
> 
> The board initially strikes me as being a bit of a weird mish-mash of conventional and thru hole technologies.
> 
> It's Interesting that no effort was made to remove the trim pots and replace them with modern calibration under micro control.
> 
> Presumably man power is cheap enough in China to still support manual calibration?  Or maybe they're adjusted by an ATE machine during production? I notice they're accessible from both sides of the PCB.
> 
> -Richie,
> 
> 
> 
> Sent from my Xperia SP on O2
> 
> ---- sleepy_dog at gmx.de wrote ----
> 
>>
>> Hehe!
>>  From the right upper corner, going left, count to the 4th jack.
>> Then move down just past the first column of pots.
>> There is the transistor ladder (1 + 4 dual transistors) and its 4 filter
>> caps.
>> Looks pretty much exactly like the moog VCF PCB I recently made, the
>> pattern is catchy :-)
>>
>>
>> - Steve
>>
>>
>>>
>>> On 2018-02-20 07:46, Mike Beauchamp wrote:
>>>> For those interested in what the Behringer Model D circuit board looks
>>>> like, I took a full res picture while I had it apart:
>>>>
>>>> http://mikebeauchamp.com/wp-content/gallery/blog-2018/behringer-model-d-pcb-fullsize.jpg
>>>>
>>>>
>>>> Mike
>>>>
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