Rosemary Ainslie circuit demonstration on Saturday March 12th 2011

[Rosemary Ainslie]

Hi Mags.

I see you've been really busy.  Very well done for showing that gain.  It seems that this is supported all over the place. 

I'm still hoping against hope that your proof is definitive.  But I want to speak to the guys at CPUT.  They're only back next week.  Another holiday - this time to celebrate Freedom day - which is a tribute to the sacrifices at Sharpville. 

And I trust you've caught up on some of that sleep.  I wish I could say the same. 

Take good care,
Kindest regards
Rosie

[Rosemary Ainslie]

and Woopy - Golly.  Many thanks indeed for that update.  You're the experimentalist here and Mags our thoretician.  Nice combo.

Kindest regards,
Rosemary

[poynt99]

The problem being overlooked by many here, is that the battery scope measurement is meaningless unless taken directly across the battery terminals.

Clearly you have not done this Rose, evidenced by the large magnitude of ringing, and the fact that the scope probes in your video are placed on the proto-board somewhere, NOT on the battery terminals.

This really is important, and Stefan you ought to be asking for that imo. All the numbers will come out quite different if this is done.

You would be wise Rose, to make an input power measurement using the two DMM/RC filter method. I think you may be surprised. You are already half way there by using the DMM to measure the voltage of 60V (shown in your video).

.99

[poynt99]

Yes Neptune, you are correct about what I was trying to get at regarding the voltage divider.

.99

[Rosemary Ainslie]

The problem being overlooked by many here, is that the battery scope measurement is meaningless unless taken directly across the battery terminals.

Clearly you have not done this Rose, evidenced by the large magnitude of ringing, and the fact that the scope probes in your video are placed on the proto-board somewhere, NOT on the battery terminals.

This really is important, and Stefan you ought to be asking for that imo. All the numbers will come out quite different if this is done.

.99

Poynty.  What you actually mean is that you HOPE all the numbers will come out differently.  Unfortunately - the scope probes cost a FORTUNE and they simply do NOT physcially - SPAN those batteries.  Nor can it be arranged that they do - UNLESS OF COURSE ONE ADDS WIRES?   

Quite apart from which, Poynty Point - if they are WRONG then explain the voltage on the DRAIN.  Is that also a 'spurious' effect?  Whatever the battery is doing - the fact is that the energy is CLEARLY going through them in both directions.  Isn't that the point?  Poynty?

Rosemary