[sdiy] 1-quadrant multiplier with 2164

David G Dixon dixon at mail.ubc.ca
Sat Jan 22 03:32:41 CET 2022

Again, this is just something to do, like playing video games or whatever.  Having the boards made professionally is quite beside the point.  I don't do this to make money and it doesn't have to be efficient. 

-----Original Message-----
From: Tom Wiltshire [mailto:tom at electricdruid.net] 
Sent: Friday, January 21, 2022 2:40 AM
To: Mike Bryant
Cc: David G Dixon; synth-diy
Subject: Re: [sdiy] 1-quadrant multiplier with 2164

[CAUTION: Non-UBC Email]

> On 21 Jan 2022, at 10:11, Mike Bryant <mbryant at futurehorizons.com> wrote:
>> There are now 87 Freak Shifts out in the wild all over the world, and 
>> everyone seems to be impressed with their performance.  Plus, the 
>> price is a measly US $300, which is a fraction of what other Bode 
>> frequency shifters cost. (Bear in mind that I build each one by hand, 
>> and each one takes me about 5 hours, so they are not mass produced.) 
>> Hence, not to put too fine a point on it, but I would say that the 
>> Freak Shift is the analogue design to beat.
> Why don't you get them built by a low volume assembly house and get on with designing more modules ?   Or at least have the PCBs made elsewhere?

My thought too. A lot of that 5 hour process was making PCBs and then messing about with jumpers. All of which would disappear if you had a simple double-sided PCB ready to go. Actually stuffing a blank board isn't that slow, especially working in batches. But there are people who'd do that for you too, if you want.

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