Testing the TK Tar Baby

[TinselKoala]

No.  No MOSFET - least of all an IRFPG50 is DESIGNED TO ACCOMMODATE A DEGREE OF AVALANCHING.

She actually said that...  amazing.

I don't think she's ever read a component data sheet in her life. It's got Graphs ! And Acronyms like Rdss !  Therefore by definition they are impossible for Ainslie to understand.


And we already know how she feels about the "spin" that manufacturers put on their products. She simply ignores manufacturer's data. As she has demonstrated many times, she knows more about Function Generators than Agilent, she knows more about oscilloscopes than LeCroy or Tektronix, she knows more about power measurement than Vishay and Wikipedia and Wolfram Alpha combined.... and clearly, she knows more about mosfets than International Rectifier. Imagine, all those lies and spin in the data sheets for all those mosfets that they _claim_ are repetitive avalanche rated, when Ainslie, autodidact genius that she is, clearly tells us otherwise. Golly! LOL.

When I first started testing my ClassE driver board, I used a PG50 because that was the only high power mosfet I had within easy reach. But with Rdss of 2.0 ohms..... it's just too lossy to work well, especially with the low current capability. Since the circuit is designed to capture and store the inductive backspike from the turnoff of the pulse in its capacitance and use that energy in the next pulse, it is very efficient in that regard, but if one is pumping each spike through a 2 ohm resistor that is really wasteful. It's a laugh that Ainslie doesn't even grasp that the mosfet still has significant resistance even when fully ON.... unless of course it is shorted. She has stated several times that the resistance is "zero" when ON, as if two Ohms were negligible. Really, an Ohm is a huge amount of resistance, but we normally work with voltages that are also huge so we don't notice the stray Ohm or two. (This is why the 2sk1548 works better in the COP>17 circuit than the IRFPG50: it has significantly lower Rdss and a faster turn on and turn off.)

The IRFP450 that I'm using now works much much better. The coil runs at 50 Volts, 6 amps input from batteries, a steady 300 Watts CW making nice corona, and that would kill a PG50 in short order. I have some IRFP460s on order and they will work even better and should allow me to get past half a kW easily, and if I put a 17n80 in there I should be able to get to a kW for short periods. Right now.... the limitation isn't the mosfet, actually, it's the secondary coil. It heats up surprisingly much at the higher power levels. I might have made a mistake by using the black PVC as a former. I know better than to use black plastics or paints on electrostatic machines; they are just conductive enough to bleed off charge from the extreme HV areas. But I didn't think it would matter for this coil. Oh well... I still have nearly nine pounds of wire, so I'll wind another secondary on a properly prepared paper form or some white PVC.

[TinselKoala]

Wilby, I owe you nothing but the contempt you richly deserve, that you repeatedly earn, and that you get from me every day. If I could package it up and send it to you in a great stinking pile, I would.

You have no idea what mosfets I used when and for how long, and you are a liar and a troll. In fact you and your grandmother figure the lying fraudster Ainslie are textbook examples of internet trolls.

Now why don't you just sail off into the sunset with your windy blowhardness, you windex-swilling bartender's helper, you.

[TinselKoala]

Here are a few more pix of sassy ClassE, running on three of TarBaby's batteries at about 4 amps (about 150 Watts), driving a corona motor.

[eatenbyagrue]

Wilby, I owe you nothing but the contempt you richly deserve, that you repeatedly earn, and that you get from me every day. If I could package it up and send it to you in a great stinking pile, I would.

You have no idea what mosfets I used when and for how long, and you are a liar and a troll. In fact you and your grandmother figure the lying fraudster Ainslie are textbook examples of internet trolls.

Now why don't you just sail off into the sunset with your windy blowhardness, you windex-swilling bartender's helper, you.

You know, I have to agree with you.  We sometimes use the term "troll" very loosely when someone posts something we do not like.  But this Wilby person is a troll in the truest definition.  I know I am feeding him with this comment, but I am just amazed at the perfect example of trollishness.  His only discernable purpose and pleasure here appears to be starting fights.  He hangs on every word, looking for an opportunity to find any fault at all, no matter how inconsequential, while mostly ignoring the main question presented.   Just an all round nasty person.

[WilbyInebriated]

You know, I have to agree with you.  We sometimes use the term "troll" very loosely when someone posts something we do not like.  But this Wilby person is a troll in the truest definition.  I know I am feeding him with this comment, but I am just amazed at the perfect example of trollishness.  His only discernable purpose and pleasure here appears to be starting fights.  He hangs on every word, looking for an opportunity to find any fault at all, no matter how inconsequential, while mostly ignoring the main question presented.   Just an all round nasty person.

go look at the record of posts in this thread idiot... i was staying out of this UNTIL your hero HAD to make a snide ass LIE about me and LIE about what he has done. and notice he doesn't deny any of it because he knows i'm right. if you want, i'll go to rose's old thread and drag up all the relevant posts and quote them here for you... OR you could sod off.
furthermore, i didn't START SHIT... your hero set the precedent, because it's what he thrives on, just like you... if you little girls can manage not to speak lies about what i have said or done, i'll manage not to post here.

tinselkoala/alsetalokin just called me a liar regarding what mosfets he used when and for how long, and he prides himself on 'proving' his claims... what do think the chances are he will prove it? i'm betting on zero...