RE: Re: [TCML] SSTC help -- a twofer...

["Dave Halliday" <dh@xxxxxxxxxxxxxx>]

A twofer:

#1) - A 20 MHz scope will display a 20 MHz sine wave perfectly. Square waves
generally require 10X bandwidth to give a good approximation and the
occasional pulse needs even higher. 

#2) - I am going to kick myself but if there is anyone living in or near
British Columbia, Canada, the BC government runs an amazing online auction.
Like all auctions, a bunch of stuff goes for waaaay more than the MSRP but
there are some incredible deals.

http://www.bcauction.ca/open.dll/welcome

They are liquidating a bunch of electronics test equipment through their
Surrey, BC office.

Dave (who lives 15 miles from the BC border)

Caveat Emptor -- you do not want to be the winning bidder for a 300 pound
piece of equipment located in White Horse or Radium Hot Springs.

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx 
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Paul Brodie
> Sent: Friday, October 16, 2009 2:35 PM
> To: Tesla Coil Mailing List
> Subject: Re: Re: [TCML] SSTC help
> 
> Please excuse my ignorance but why the need for the higher Hz 
> oscilloscopes? 
> I only have a 20mHz Techtronix 435 and it has served me well, 
> so far. Am I 
> missing something I don't realize I am missing or have I just 
> not delved as 
> deeply as I should? Thanks.
> Paul
> Think Positive
> 
> ----- Original Message ----- 
> From: Ken or Doris Herrick
> To: Tesla Coil Mailing List
> Sent: Friday, October 16, 2009 14:39
> Subject: Re: Re: [TCML] SSTC help
> 
> 
> Steve is of course right--but I'd suggest a n.l.t. 100 mHz scope--esp.
> for the relatively small coil Rob Byron has.
> 
> And Rob, since you're beginning in this, my take on the process might
> entertain you (and others).  There are (or can be) 5 stages in what we
> do:  Invent it, simulate it on the computer, design it, build it, and
> make it work.  Each stage incorporates going back & re-doing all the
> prior stages, often numerous times.  To a first approximation, each
> stage is at least twice as difficult as the previous one and twice as
> time-consuming.  And each stage is at best half as enjoyable as the
> previous one.  Do the math...but enjoy it nonetheless.
> 
> Ken Herrick
> 
> Steve Ward wrote:
> > Without an oscilloscope you are essentially blind to the world of
> > electronics.  Only a scope will let you "see" how 
> electronic circuits 
> > work.
> >
> > Seriously, get a scope and learn how to use it (make this a 
> project in
> > itself), it will make your SSTC project actually possible, 
> rather than 
> > just
> > sticking some components together and watching the result.  
> If i had to
> > guess, id say 95% (maybe more?) of "complex" electronic 
> prototypes DONT 
> > work
> > before some initial debugging.  For circuits that operate 
> at more than a 
> > Hz
> > or so, you need a scope to debug.  Its just that simple.
> >
> > You should be able to "get by" with a 20MHZ bandwidth scope 
> and some cheap
> > probes, which should be something in the 50-100 dollar 
> range used on ebay.
> > My first scope was 60MHz and cost 120 bucks on ebay.  Since 
> then ive moved
> > up to more serious equipment in the >$1k range, but then 
> again i take this
> > hobby too seriously ;-)
> >
> > Steve
> >
> >
> 
> 
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