On 9/22/20 10:04 AM, Jim Brown wrote:
On 9/21/2020 5:11 PM, Ignacy Misztal wrote:
It s hard to be smart here without tons of experimentation.
Huh? How about studying the fundamentals? The ARRL Handbook and ARRL
Antenna Book are great places to do that. NEC modeling is a great
learning tool for antennas, and SimSmith is great for studying
transmission lines and matching networks. There are several tutorials on
my website that cover ferrites and common mode chokes. Jerry Sevick
published a lot of great work on transformers using ferrite cores.
73, Jim K9YC
And these days, one can buy a nice little VNA (NanoVNA) that works great
at HF for $50 - just the thing for checking the calculations.
Of course, then you'll wind up learning more than you want to know about
"fixturing" for testing your transformers and chokes.
I will say that magnetics design is very much a "calculate, then try"
sort of thing. There's a lot of things (like parasitic C) that are hard
to model with simple tools.
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