As requested, a FFT of the Viktor oscillator in single ended mode, through the AR, to E1DA.
View attachment 1243896
Pretty sure those harmonics come from the opamps (OPA1656 + OPA1622) as the Viktor (latest version) is below -150dB.
So we can measure down to -120dB reliably.
Patrick
George
to provide schematics/gerbers etc to allow us to get our own PCBs made?
And also to provide full (and free of course) technical support when (any of) you get stuck ?
Or risk putting his reputation on the line if he doesn't ?
Patrick
Let me give you some insight.
To develop the final unit has taken me probably two years and up to 4 prototypes, say at an investment of maybe € 3000 - € 3500. When you bring out something like the autoranger, there's people that understand the functionality and the engineering behind it. They purchase the kit and build it successfully, with a rare case where someone needs some help, and if you are lucky you can recoup the investment. But it's also a lot of fun to work on something like that and the interaction with people that are interested.
Gradually, people read about it and the enthousiastic reports which tends to generate 'I want it too' reactions, without really having an insight in what it does, where/how it should be used, and the expertise and insight required to bring it to a successful end. That means that I have to set aside one or two hours a day just to support that phase. I don't have that time.
So there will not be a second batch.
Jan
To develop the final unit has taken me probably two years and up to 4 prototypes, say at an investment of maybe € 3000 - € 3500. When you bring out something like the autoranger, there's people that understand the functionality and the engineering behind it. They purchase the kit and build it successfully, with a rare case where someone needs some help, and if you are lucky you can recoup the investment. But it's also a lot of fun to work on something like that and the interaction with people that are interested.
Gradually, people read about it and the enthousiastic reports which tends to generate 'I want it too' reactions, without really having an insight in what it does, where/how it should be used, and the expertise and insight required to bring it to a successful end. That means that I have to set aside one or two hours a day just to support that phase. I don't have that time.
So there will not be a second batch.
Jan
Hey Jan,
There are those who understand, they get it. Some even know it.
Folks,
2 hours a day is an awful lot of time, that's focused work and he isn't getting paid for it. So hat's off to Jan for conceiving the project to start with, then actually producing a working product where there was none.
-Chris
There are those who understand, they get it. Some even know it.
Folks,
2 hours a day is an awful lot of time, that's focused work and he isn't getting paid for it. So hat's off to Jan for conceiving the project to start with, then actually producing a working product where there was none.
-Chris
I have been asked about the case we used in post #841.
This is the link :
https://www.ebay.de/itm/163579182745
The front panel dimensions belongs to Jan.
You will need to ask him if he is willing to share.
Patrick
This is the link :
https://www.ebay.de/itm/163579182745
The front panel dimensions belongs to Jan.
You will need to ask him if he is willing to share.
Patrick
Until you've done it, it's hard to appreciate the time that support can soak up. Never tried this with electronics, but I've written, documented, supported programming APIs and there's a ton of work involved, before, during and after.I don't have that time.
So there will not be a second batch.
The problem is that support is a draw, you feel obliged because it's your baby, your reputation. But every hour you spend on it is an hour you can't spend on something else more rewarding.
OTOH I'm relatively new to the whole DIYA thing and by the time I realised why I might need Jan's autoranger they weren't available. Frustrating, but that's life I'm afraid.
If someone happens to have an AutoRanger, but wants to put it in a case like mine, he would need the dimensions to machine the front panel.I don't see what value that has for other purposes.
The other way out is to measure from the sheet metal case provided by you.
That will of course be less accurate.
Patrick
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