From: info@turneraudio.com.au   
      
   Phil resounded with a near zero content post of....   
      
      
   "patrick-turner"    
   ( snip 7K of self indulgent reminiscing and    
    wanking  from an aging, retarded brick layer )    
   ** My fucking god, the excruciating, long running    
   " Turneroid Concerto for Solo Trumpet "    
   is reaching *megalomaniacal* proportions.   
   When will it ever fucking finish   ??????    
      
      
   Unfortunately, Phil has a limited visioin of the world, and about any of its   
   peoples, but then all opinions are "limited" in veracity or plausuibility.   
      
   But I take issue with Phil's phrase " ** My fucking god "   
      
   Unfortunately, despite millions of years passing since our species evolved to   
   consider the possibility of a spirit world and a god of some sort or other, or   
   many others, there has never been convincing demonstration by anything   
   supernatural ever having    
   existed. THEREFORE, how on earth does Phil's god copulate, ie, fuck, root,   
   pharque, poke etc ?    
      
   Being Sunday, and a time to consider religious matters if one wishes, then I   
   invite Phil to talk more to us about his copulating god, and discuss the   
   properties of the god, and of the copulation methods and details.   
      
   I am just longing to hear the PT's last post.    
   Pun massively intended ......   
      
   Weel keep longing, but the world moves on Phil......   
      
   Meanwhile, I have tried unsuccessfully to get a transistor based Schmitt   
   trigger square sine wave to square wave converter to work up to 2MHz, using 3   
   x PN100 transistors, and produce +/-10V peak, with 20V rise time of 0.05uS,   
   and with good symmetry and    
   without having a huge number of R&C compensation networks and a lack of   
   readiness to work properly above 300kHz.    
      
   Perhaps the PN100 ( said to be equalivalent to 2N2222 and many other types )   
   is something that is allergic to working much above 1MHz, and seems like its   
   gain rolls off and base current increases renderig it impossible to use in the   
   many Schmitt Trigger    
   circuits displayed when Googling. NONE if the displayed websites have a   
   complete circuit showing details of operation with all voltages and wave forms   
   and the F range over which reliable operation can be had. In other words,   
   there is a huge anount of    
   regurgitation of basic info that is practically useless, a typical feature of   
   how the Internet displays mostly crap that IS CRAP because most essential   
   details are never included and test results never given.   
      
   What would Phil have us drink about Schmitt triggers? A bowl of sour and   
   bitter un-helpful bullshit perhaps?   
      
   Now stay calm Phil, and, in your own words, and, in your own time, post   
   something genuinely helpful, please......   
      
   Meanwhile, in the absense of anything really helpful online about trying to   
   make square waves up to 2MHz, I'll explore what a 4093 chip will do, and maybe   
   get a +/-3.3V pk swing which can be amplified to be +/-10Vpk, and thus match   
   the +/- 10Vpk swing of    
   the sine wave oscillator I just made with tubes.    
      
   The harmonic content of a square wave is well posted online and consists of   
   fundemental sine wave and odd harmonics of the fundemental frequency, Ff. If   
   Vf = 2MHz, then for a FAIR looking square wave we need the correct relative   
   levels and phase of 6MHz,    
   10MHz, 14MHz, 18MHz. The devices which produce or amplifiy the square wave   
   must therefore not attenuate the harmonics, and should be able to handle 10   
   times the Ff.   
   I think a PN100 is dismally incapable of what I wish it to do.    
      
   If Phil or anyone else would not wish to use a 4093, or 74LS14, what device   
   would they use?    
      
   I do not wish to have to pioneer the use of say 2 x 6CM5 or 2 x 6CL6, EL86   
   etc, to make reasonably good looking square waves between 1Hz and 2MHz. The   
   little BJTs are OK for 1Hz to say 250kHz, but beyond that they really   
   struggle.     
      
   Patrick Turner.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)