Testing the TK Tar Baby

[Rosemary Ainslie]

At least you have confirmed that you do understand the question.  The indicated gate drive IS more than sufficient to cause Q1 to turn fully on.  Yet the CSR trace does not show the current flow one would anticipate if Q1 were turned on.

So, yes, the question is why is Q1 not turning on?  Q1 must either be defeective or not connected as indicated by the schematic (Q1 can't have a DS short or lots of current would flow, so if it failed, it failed open circuit).

The reason people will "buy in" as you say is because the data is staring at all in the face.  The 'scope traces do not lie, and all can see from the schematic that if the gate of Q1 were to be made positive, current should flow and be indicated by the CSR trace.  The 'sope says +12 volts going to the Q1 gate.  Even your supposed 6 volts should turn it on more than sufficiently to show significant current flow.  FIG5 only shows around 6 volts being applied to the gate of Q1 and look at all that current flow as indicated by the CSR.

IT IS NOT 6 VOLTS you absurd man.  It is LESS THAN 6 VOLTS.  OBVIOUSLY.  Else the current would flow.

R

[picowatt]

Thank you.  I see a glimmer of light.  You're acknowledging that your argument is PURE NONSENSE.  NOW.  Take it one step further.  Look at what happens when you apply the OFFSET.  If you're not sure then check out TK's videos.  Even he knows this  He showed it.  To us all.  THEN.  That's what's happened.  The offset takes the voltage lower yet.  You also SURELY are aware of this?  If not then go and learn something. 

Rosie Pose

There is +12 volts being indicated as gate drive to Q1.  This is FACT.  Easily confirmed by anyone wanting to take the time to verify this with LeCroy.  There is absolutely no wiggle room, no possible argument.  Anyone that can read a 'scope can plainly see this for themselves.  No matter how the offset on the FG is set, the 'scope traces will always display the correct voltage, provided that the 'scope channel is is set to DC coupling.

As well, the offset numbers on the LeCroy have nothing to do with this, so don't bother to play that card again.

Q1's gate is being driven with +12 volts and it is not turning on as it should.  That is just a plain undeniable fact, readily apparent to all that can read a 'scope and a schematic.

[Magluvin]

My dear picowattWhy should I go to the trouble to faxing anyone at all?  To convince you?  Or to convince the likes of Mags? 
Rosie Pose

You are pushing me further and further away Rose. "the likes of Mags" ? Maybe tomorrow, I will show you the "likes of Mags"

Night and the sweetest of dreams.

Mags

[picowatt]

IT IS NOT 6 VOLTS you absurd man.  It is LESS THAN 6 VOLTS.  OBVIOUSLY.  Else the current would flow.

R

My best read of FIG5 at lots of zoom shows the gate drive to Q1 as being +5 volts.  Is that not less than 6?  Yet Q1 is turning on in FIG5 just as it should.

[picowatt]

Wow, I totally missed that "why should I fax anyone?" comment.

Gee, I don't know, because as the author of a paper you promote as factual it would be due diligence and demonstrative of integrity on your part?

Just guessing...