Testing the TK Tar Baby

[picowatt]

I could just let it run in oscillation mode, then M5 wouldn't be required (just ground M4's Source). However, I want to be able to achieve burst oscillation mode just as Rosemary's circuit does. It poses a bit more of a measurement challenge as well.

.99

Thanks for that 99, now it is perfectly clear to me.  I was thinking with regard to a battery run down test or similar.


PW 

[MileHigh]

Gentlemen:

Yes I am an analog scope man too!  I loved that generation of scopes from the early 90s.

If you want to go computer-based there are some higher-end cards out there:

http://www.gage-applied.com/index.htm

Here is the setup to think about:  Modern Core i7 computer with three 22" or 24" monitors.  So you can dedicate two monitors to your virtual scopes and run your desktop on the third.  And then of course you have your favourite analog scope on your bench also.   It would be pretty sweet.  Throw in about 700 movies too!   

Some of you may remember the days when an engineering department always had a 10-foot row of yellow TI data books and an eight-foot row of blue National data books.  Almost every year they were renewed and you had to start throwing them out.

MileHigh

[MileHigh]

If you are hard core:

http://books.google.ca/books/about/Advanced_Engineering_Mathematics.html?id=qh1W-1nwUsEC&redir_esc=y

[picowatt]

Gentlemen:

Yes I am an analog scope man too!  I loved that generation of scopes from the early 90s.

If you want to go computer-based there are some higher-end cards out there:

http://www.gage-applied.com/index.htm

Here is the setup to think about:  Modern Core i7 computer with three 22" or 24" monitors.  So you can dedicate two monitors to your virtual scopes and run your desktop on the third.  And then of course you have your favourite analog scope on your bench also.   It would be pretty sweet.  Throw in about 700 movies too!   

Some of you may remember the days when an engineering department always had a 10-foot row of yellow TI data books and an eight-foot row of blue National data books.  Almost every year they were renewed and you had to start throwing them out.

MileHigh

MH,

I have used a few PCI cards over the years, and I see the link you posted has some fairly high bandwidth 16 bit cards that look interesting.  The problem is that with all the hi res PCI cards I have used, the PC evironment is just too terribly noisey.  All those harmonics spewing from all those clocks and switchers is just a mess at the 16bit noise floor.  I have had better luck with USB and a laptop on a linear supply or with a gel cell running the laptop.  Possibly the newer cards are shielded and isolated better.  I do however wish companies would just put pricing on their website!  Possibly I'll check with them regarding pricing.  I see their USB scopes only go to 14 bit.

I never doubted your appreciation for analog as well, however, and yes, the 90's were indeed good years for analog scopes (and about the last good years as well).

PW

[TinselKoala]

So I see that there is still some question about which schematic is the correct one to use. Evan Robinson, one of the co-authors of Ainslie's papers, is listed as the Page Coordinator of the Rosemary Ainslie page at Sterling Allen's PESWiki site, and he has this as the "latest circuit". It appears to be the one given in the second paper, that we are assured is a misprint or typo by RA.

These things do matter, at some level. I mean, if the bullshit stops below eye level or above eye level, that's a significant difference. It's still bullshit and you're still covered in it, but it's a significant difference nevertheless.