Dr Ronald Stiffler SEC technology

[erfandl]

Lidmotor - I build the crystal oscillator circuit with BD243C transistor. the transistor isn't get hot and stay cold with 24 volt input. the current output from DC DC boost converter is 24 mA so 24*24= 576 mW

[Slider2732]

Lidmotor - Very nice looking output 
Have got several transistors here that I call 'mains rated', just denoting their package size and power handling. There has been some success, but generally the hFE is much smaller. An idea, has been to use perhaps a good hFE MPSA18 and send its output to a PNP, somewhat similar to the very efficient 'DadHav' 2 transistor circuit.
Tests will be done with various NPN's and A733 or A1268, but the idea being to use good power transistors as an end result. Thought it might appeal as a route

Say, my L2 on the SEC 18 is quite roughly wound. Have you boxed and put away yours yet or could you tell me how your L2 looks on the bobbin ?
A bonus would be the winding direction, because as iQuest has indicated, both the L2 and L3 should be wound in the same direction.
I may rewind it, but then again if yours is the same then it might be how they are supposed to be.

[Lidmotor]

erfandl---Great news about the BD243c transistor working for you on your crystal circuit.  I am going to order a bunch more because they seem to work well on these type circuits.  The MJE181 one works well also.  It works on the GBluer circuit also but I blew one accidentally.  By the way don't expect high light output on Gary's 3 choke circuit.  It is just an interesting circuit to experiment with.  The hot choke problem I encountered also.  One of my circuit modifications had high current running right through one and it almost melted.   
     
Cheers---Lidmotor

[Slider2732]

Btw chaps...it's someone from history's birthday today 
We kind of owe it to the guy to light bulbs in fields by the end of the day !

[Lidmotor]

Slider-- My SEC-18s are at another location so I can't look at them.  As I recall the L2 (plastic bobbin) coils were neatly wound.  I don't think it matters though.  The BD243C transistor is what is used in my cheap EBay 'Mini Tesla Coil'.  They give you a spare in the kits I bought.  I was wondering about a Darlington type arrangement also. 
    I have been pouring over the Doc's old videos and forum discussions from 2011 when the PSEC quest was in full swing.  Did we miss something?  Is he going to tell us some secrets while he is still healthy enough?  It seems that he is heading in that direction.  I have always wondered if a glowing red led attached to a scope ground lead wasn't the whole story of the PSEC.  What else was going on?

--Lidmotor