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FT-140-43 Ferrite Toroid Core | 43 Material

FT-140-43 Ferrite Toroid Core | 43 Material

Q: How much power will a balun made from an FT140-43 handle?

The maximum power has to do with the permeability of the material and the field strength your coil generates. If you exceed the maximum power, you won't damage the unit, but will incur losses as the ferrite material is saturated and cannot support an increased magnetic field. I'm using a single FT140-43 for a 49:1 UNUN (16 gage wire) running at 10 watts max for portable field operations, and it works very well for this application. According to my calculations, it could handle up to 37.5 watts CW or 60 watts SSB. If you need more power, I would recommend stacking two FT140-43s, and you could double the power, i.e. 120 watts SSB / 75 watts CW. If you're looking for even higher power, I would look at using an FT240-43 or FT240-52 core.

Q: What is the country of origin?

Faur-Rite Brand (the manufacturer) FT140-43 are manufactured in China.

Q: Where do you put these , on the wire or somewhere else ? I see some say wrapping the wire , do you run it in and out of the ring ?

Yes you run it in and out of the ring as many times as it can.

Q: Can this be used for long wire unun balun? some sites suggest t-130 hence the question.

Yes. I wrapped mine with #12 antenna wire as a choke between my elevated radials and earth ground. Major improvement to my signal strength. K5AE

4.8/5

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FT-140-43 Ferrite Toroid Core - Amidon | 43 Material

BNTECHGO 16 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0492" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors

FT-240-43 FT240-43 Ferrite Toroid Core 43 Material

描述

FT-140-43 Ferrite Toroid Core | 43 Material

有问题吗？看看别人问了什么

How much power will a balun made from an FT140-43 handle?

What is the country of origin?

Where do you put these , on the wire or somewhere else ? I see some say wrapping the wire , do you run it in and out of the ring ?

Can this be used for long wire unun balun? some sites suggest t-130 hence the question.

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