Posted on 12/28/2021 7:06:53 AM PST by Red Badger
That’s interesting :-)
I have been making a few rf transformers myself.
Using F240-43 cores. three of them stacked to handle
1kw at hf.
You must be using some tiny cores.
Yes, binocular and toroids mostly.
B and J material.................
One thing I have learned is that the more ferrite material you use the less intermodulation you will have.
Keeping the cores from saturating at high power will make more power available at the output and less intermods.
So, if you need more power or there is too much loss, add another core....................
It’s always amazed me how some experimenters shy away from winding toroids.. It is so easy, and actually fun, at least to a strange bird like me :-)
I get paid for it.....................
That’s cool :-)
I’m mostly retired now, I used to get paid to design biomedical hardware/firmware.... I started out in medicine but when that become unworkable for me I got into engineering and combined the two fields.
We specialize in the HF range, 300kHz - 32MHz and in the 1-2GHz ranges..................
“We have managed to live with gasoline, propane, and LNG. “
The beauty of those fuels is that they are not flammable unless in the presence of oxygen, so a tankful of one of those fuels is not flammable
Batteries, dynamite and charged capacitors on the other hand, need nothing but a “detonator” to make them go ka-boom.
I am making some simple hf transformers for 1.6-60mhz, they are for half-wave, end-fed radio antennas. To match the high impedance at the feed-point to the low-impedance 50ohm coax.
This is the classic End-Fed Zepp design first used in WW1 on dirigibles. It requires no rf ground to function since it is a half-wave design. The most often seen example is called a J-Pole antenna commonly used for VHF and above.
One little mistake...lol
BTW, you may find this interesting. I have been using this amazing test instrument that costs less than 100.00 and while it is not a pro-level device it does work and is fine for many uses.
https://www.youtube.com/watch?v=mKi6s3WvBAM
I’ve seen the one you use. A salesman brought one by here when they first came out about ten years ago, IIRC..............
I got mine at a Ham Radio shop. I got a cheap 1.5ghz version but they have a 6ghz one that looks fun.
That is a step up from a 79.99 version...lol
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Research capacitors instead of batteries for EV. I was if the same thought and found out they will not directly replace batteries. What may work is a capacitor for the take off from a stop light and then use regen to recharge capacitor. Maybe best of both worlds, fast discharge and recharge for high flow needs and batteries for range with low flow rates.
This is making me feel like we are inadequate.
We have 300ah on the boat with 660w of solar. Most days, we take in more than enough solar to run everything. The weather here in Southern Florida is sometimes cloudier than it needs to be.
But, otherwise we’re good!
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