Re: eznec and LTspice software

Rick Bennett

I second that.  The EZNEC manual is one of the best out there.  (My iPhone is one of the worst I have ever seen, I wouldn't even put them in the same category).  

I think the challenge with antenna modeling is that it is complex.  It takes time to learn how to get good results from the software.  I have found Roy's manual to be helpful for almost every odd situation I have messed with and that is above and beyond most manuals.  But antenna modeling takes time to learn and you just have to spend time, accept some trial and error with it and learn some antenna theory to understand what you are getting.

I have not tried LTspice yet, but I expect that the issues are similar.  

While these things may not quite be "rocket science", they are not far from it either.

de KC0PET, Rick


Really, you find the EZNEC manual poorly written?  I actually think Roy did an outstanding job with it (I have no financial interest in EZNEC).  Of course, I will point out that antenna modeling is a little more involved than turning on/off some combination of four burners and an oven, so the manual may not read like that of a 1950's vintage range.  If that's what you were looking for in the EZNEC manual, I can see why you were disappointed.


From: Phil Anderson
To: 4sqrp@...; n0evh ; WA0ITP
Cc: Phil Anderson
Sent: Monday, March 25, 2013 11:42 AM
Subject: [4sqrp] eznec and LTspice software

Good idea John on downloading EZNEC. It does take a bit of time to get used to the manual/instructions - and that would be true of any manuals "written" today. Manuals in general are a problem. Take my iPhone as an example, really crappy documentation. About 6 or 8 years ago I was visiting my daughter in St Louis and we were cleaning her kitchen. We really cleaned the stove top gas range only to discover the manual for it in the drawer, written in about 1950. I found that manual to be excellent, very clear on how to use it and what burner went with what knob, etc. Not so of today's ranges. When did we stop teaching writing to kids, todays designers? Maybe about 1980?
A second via John, consider downloading LTspice. You can download a free copy from linear technology's website. It is really super for simulating circuit. It's easy, for example, to draw the schematic for a audio phase-shift oscillator and then hit the simulation button; you can select to see the waveform generated or the frequency response of the unit. Then you can change values and play what if. Again....the manual takes some time to get used to.
If anyone is interested, we could get a "go-to-meeting" link set up on the WEB and I'd be happy to outline how to use the program, generating and simulating several simple circuits. Let's discuss that at Ozcon?
Uncle Phil 

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