[sdiy] Fwd: AD633

[Ben Stuyts]

Ok, that seems to work. There was another content filter at work, and I had to explicitly allow PDF’s to go through.

Ben

> On 26 Dec 2019, at 22:04, Ben Stuyts <ben at stuyts.nl> wrote:
> 
> Trying to get Dave’s PDF through...
> 
>> Begin forwarded message:
>> 
>> From: David G Dixon <dixon at mail.ubc.ca <mailto:dixon at mail.ubc.ca>>
>> Subject: RE: [sdiy] AD633
>> Date: 26 December 2019 at 19:42:37 CET
>> To: "'Ben Stuyts'" <ben at stuyts.nl <mailto:ben at stuyts.nl>>
>> Cc: <synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>>
>> 
>> Thanks, Ben.  The document is attached.  I use Primo PDF to make PDFs from Word documents, and it is a bit of a memory hog.
>> 
>> Cheers,
>> Dave
>> 
>> -----Original Message-----
>> From: Ben Stuyts [mailto:ben at stuyts.nl <mailto:ben at stuyts.nl>] 
>> Sent: Thursday, December 26, 2019 6:02 AM
>> To: David G Dixon
>> Cc: Chris McDowell; synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>
>> Subject: Re: [sdiy] AD633
>> 
>> Dave,
>> 
>> There was a limit of 200 KB on attachments, so yours did not came through. I’ve upped the limit to 1 MB now, so if you resend it, it should appear on the list.
>> 
>> Thanks,
>> Ben
>> 
>> 
>>> On 26 Dec 2019, at 06:01, David G Dixon <dixon at mail.ubc.ca <mailto:dixon at mail.ubc.ca>> wrote:
>>> 
>>> Hi Chris,
>>> 
>>> I wrote up a little document explaining the circuit, which is attached (not sure it will go to the whole list or not -- can we attach files on list emails?).
>>> 
>>> If you would like me to make you a handmade PCB as shown in the document, just let me know.  I'd charge $15 for that, plus shipping.  I could make it immediately.
>>> 
>>> Cheers,
>>> Dave
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> From: Chris McDowell [mailto:declareupdate at gmail.com <mailto:declareupdate at gmail.com>] 
>>> Sent: Wednesday, December 25, 2019 5:49 PM
>>> To: David G Dixon
>>> Cc: klangbau; synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>
>>> Subject: Re: [sdiy] AD633
>>> 
>>> I would looove to see your no-trim multiplier, David! :) I've had great success with the osamu et al schematic with the extra cell in series for temp compensation, but avoid trimmers at all (most) cost, for production but especially for personal builds! no time for fuss in these here holidays. 
>>> 
>>> Cheers,
>>> Chris 
>>> 
>>>> On Dec 25, 2019, at 6:07 PM, David G Dixon <dixon at mail.ubc.ca <mailto:dixon at mail.ubc.ca>> wrote:
>>>> 
>>>> Yes, I have an idea.  Use linearized 2164 to make your multipliers for the frequency shifter.  I have a nifty little design I could send you which doesn't require any trimming, and gives very accurate balanced multiplication with a minimum of parts and fuss.
>>>> 
>>>> 
>>>> 
>>>> -----Original Message-----
>>>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org <mailto:synth-diy-bounces at synth-diy.org>] On Behalf Of klangbau
>>>> Sent: Wednesday, December 25, 2019 3:30 AM
>>>> To: synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org>
>>>> Subject: Re: [sdiy] AD633
>>>> 
>>>> Hallo,
>>>> 
>>>> looking for AD633 to a reasonable price. Ordered a few in
>>>> China/ALI-Express in SOP-8 for 3€ each. Same as others I tested last
>>>> year; don't work and drive hot after a few seconds. My test circuit is
>>>> fine and works with AD633 bought for 10€ each. Need it for my
>>>> Frequency-Shifter.
>>>> 
>>>> Any idea?
>>>> 
>>>> willi
>>>> 
>>>> 
>>>> willi sauter
>>>> KlangbauKoeln
>>>> 
>>>> 
>>>> 
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>>>> 
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> <One-VCA 4Q Multiplier Document.pdf>
> 
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