[sdiy] Electronotes, op-amp substitution, thru-zero BODE???

[jeff brown]

----- Original Message ----- 
From: "jeff brown" <guitaricon at comcast.net>
To: "harrybissell" <harrybissell at prodigy.net>
Sent: Saturday, January 14, 2006 8:09 PM
Subject: Re: [sdiy] Electronotes, op-amp substitution, thru-zero BODE???


> You can get PCBs for the dome filter sections (similar to Jurgen's, as 
> IIRC) from Ken Stone (special order). As for PCB's for the multipliers and 
> thru-zero VCO, you're on your own.
>
> I started down this route when Ken first issued the filter boards, but 
> wussed out and got the Encore unit from Tony.
>
>
>
> ----- Original Message ----- 
> From: "harrybissell" <harrybissell at prodigy.net>
> To: "phil macnutt" <philmacnutt at mac.com>
> Cc: <synth-diy at dropmix.xs4all.nl>
> Sent: Saturday, January 14, 2006 7:12 PM
> Subject: Re: [sdiy] Electronotes, op-amp substitution, thru-zero BODE???
>
>
>>I see you like your projects BIG...
>>
>> Yes, you need a thru-zero VCO, and some phase splitting filters
>> (that are not simple) and a couple of good multipliers.
>>
>> I believe everything can be found at Jurgen Haible's site.
>>
>> He likes his projects BIG, too...   :^P
>>
>> H^) harry  (who likes his projects BIG too... but does not need freq
>> shifting
>> THAT bad... :^)
>>
>> phil macnutt wrote:
>>>
>>> Howdy all,
>>> I'm rather interested in somehow figuring out a way to build a Bode/Moog
>>> frequency shifter clone of some sort, but I don't understand the guts of 
>>> how
>>> it works.  Is the "thru zero VCO" the basis for this famous module? 
>>> Would
>>> anybody care to comment on the possibility of building one?  I'm not 
>>> looking
>>> for an exact clone, but something that has the same basic functionality.
>>>
>>> Ten minutes of googling turns up the following info:
>>>
>>> 1.      Encore says they sell one for $389 USD, but 1)an email sent 
>>> bounced,
>>> and 2)I'd much rather build one at least from a kit/blank PCB
>>>
>>> 2.      On Magnus' website there are links to the Moog schematics, but 
>>> the
>>> links are dead.
>>>
>>> 3.      Two folks I found on the web have built their own (names 
>>> withheld
>>> since I don't personally know them), but no PCBS available.
>>>
>>> 4.      Analogue Systems sells one for about $1,400 (USD)
>>>
>>> For me, I guess the ultimate goal here is to somehow wind up with a PCB
>>> layout and a list of components that are readily available.
>>>
>>> So, any help or advice would be most appreciated.
>>>
>>> Best regards,
>>> Phil
>>>
>>> -----Original Message-----
>>> From: owner-synth-diy at dropmix.xs4all.nl
>>> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Dave Kendall
>>> Sent: Saturday, January 14, 2006 6:41 AM
>>> To: synth-diy at dropmix.xs4all.nl
>>> Subject: Re: [sdiy] Electronotes, op-amp substitution, thru-zero
>>> oscillator...
>>>
>>> >> i'm also looking at the thru-zero VCO... pretty complex project,
>>> >> but i'll never be buying one from cyndustries... any of you
>>> >> oldtimers ever build one of these beasts?
>>>
>>> I found this. Doesn't look too complicated......
>>>
>>> <http://www.edn.com/article/CA341451.html>
>>>
>>> Cheers,
>>>
>>> Dave
>