[sdiy] BBD clock bleed

Vladimir Pantelic vladoman at gmail.com
Tue Oct 23 15:07:28 CEST 2018


no output balance trimmer between out1 and out2 on this one

On 23.10.2018 14:46, Quincas Moreira wrote:
> Sorry Folks, please follow this link
> https://drive.google.com/open?id=1O5kKkaJZqom61W8WQKQCfm3gLF83goz0
> 
> Sent from my iPhone
> 
> On Oct 23, 2018, at 06:13, Tom Wiltshire <tom at electricdruid.net
> <mailto:tom at electricdruid.net>> wrote:
> 
>> The list strips attachments. Can you post a link?
>>
>>
>>> On 23 Oct 2018, at 08:30, Quincas Moreira <quincas at gmail.com
>>> <mailto:quincas at gmail.com>> wrote:
>>>
>>> thanks folks. It’s a new
>>> module, not yet released V3205 based. Strange that you don’t see the
>>> pdf attachment, I’ll try again in the morning
>>>
>>> Sent from my iPhone
>>>
>>> On Oct 22, 2018, at 23:59, Pete Hartman <pete.hartman at gmail.com
>>> <mailto:pete.hartman at gmail.com>> wrote:
>>>
>>>> As others have said a lot depends on which BBD we're talking about.
>>>>
>>>> Most of my BBD experience is with Blacet's Time Machine.  It uses
>>>> the MN3005 which has balanced outputs, which can be trimmed to
>>>> minimize the clock bleed, and it also uses clock dependent filtering
>>>> and compansion to help reduce the noise further.  I have also played
>>>> some with the Doepfer A-188-2 which uses a tapped BBD, and that does
>>>> *not* have balanced outputs, so the bleed is harder to tame.
>>>>
>>>> I looked at the Erica site as well, and honestly, I can't tell which
>>>> one you're asking about either.  Let us know/attach the schem, and
>>>> I'm sure someone will have suggestions :)
>>>>
>>>> Pete
>>>>
>>>>
>>>>
>>>> On Mon, Oct 22, 2018 at 8:55 PM Quincas Moreira <quincas at gmail.com
>>>> <mailto:quincas at gmail.com>> wrote:
>>>> Hey friends! I'm working in a review of the new Erica Synths BBD
>>>> module, and I'm getting massive bleed of the clock frequency (though
>>>> it looks sinusoidal rather than square)
>>>> Any tips on minimizing this bleed? Anytime the clock steps into
>>>> audible range it's super loud
>>>>
>>>> Schematics included...
>>>>
>>>> Thanks!!
>>>>
>>>>
>>>>
>>>> -- 
>>>> Quincas Moreira
>>>> Synth Diy Guy
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> 
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