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Re: Electronic Work bench; better than priced bread
Tesla List wrote:
>
> Original Poster: dwight duncan <duncand-at-ccsalpha2.nrl.navy.mil>
>
> Hi All,
>
> For the last month I have had the fortune of using a new modeling
> program that I bought for work (NRL). The software is "Electronic Work
> Bench". There are pop-down symbols for all components and you just start
> drawing your circuit as you would on a piece of paper. You can edit any of
> the components including magnet core transformers and nonmagnetic core
> transformers. It has an extensive inventory of passive and active
components.
> Just to test it, I made a 2 meter three conductor strip line HV pulser.
> I used a 5 KV supply and charged it through a 1 M resistor and fired it
> with a peaking spark gap. I also tapered the output stage of the line by a
> factor of 100 to give me a voltage gain of 10; Vout = sqt(Zin/Zout).
> I took some data of a few shots on a TDS 460 DSO. I then used
> Electronic work bench(EWB)to mode the circuit. EWB has a scope as many
> other diagnostics and I looked at the output from the mode. I could not
> believe what I had seen. It was identical to the data that I collected
> both in time series and in amplitude prediction. I was amazed because I am
> an experimentalist by profession and it is rare that theory gets you with
> in a factor of 2. Rarer still is the increasable moments when theory
> predicts exactly what you measure.
>
> Here is the info for the software:
>
> Electronic Work Bench (personal addition for circuit simulation)
> Price $299.00
> Phone (416)977-5550
>
> Hope this will interest some of you,
> Dwight
I will second the endorsement of EWB. I've been using various versions
for the Mac and PC for a number of years, and find it to be well
worth the money. For example, it simulates quite accurately the
behavior of an NST with capacitive load and spark gap, including when
the primary voltage is cranked down to a value where there is about 1
spark every six or eight cycles of the 60 cycle line.
A simple model of the TC primary and secondary can show the effects of
varying the coupling and Q, reveal the "magic" values of k, etc.
Ed