[sdiy] AD633

[klangbau]

Hallo David,

attached file arrived.

I will study the document and test it in my Frequency-Shifter. A DOME
filter is finished. Hope it is OK for you?

PCB and schematic differs at first sight. OK will see, work for next year.

Thank you


willi sauter
KlangbauKoeln

Am 26.12.19 um 06:01 schrieb David G Dixon:
> 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]
> Sent: Wednesday, December 25, 2019 5:49 PM
> To: David G Dixon
> Cc: klangbau; 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> 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] On Behalf Of klangbau
>> Sent: Wednesday, December 25, 2019 3:30 AM
>> To: 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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