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Ferrites
Ferrite toroids and snap-on chokes for audio and HF purposes (see our Ferrite selector page here) - we stock several types of toroid for HF Baluns/Chokes as well as the 31-mix "Problem Solver" which makes a great mains-filter and ad-hoc choke. We also have 5mm+13mm snap-on "domestic" ferrites for taming audio/Hi-Fi/USB issues when near strong RF. The following chart shows how different ferrite materials perform across HF. The green band indicates "resistive", which is desired for best performance. As you can see, 9 turns of coax on an FT240-31 is a good all-round HF solution. Coax can be RG174, RG316, RG58, RG8 "mini" or RG142 depending on your power requirements.
A 13mm Snap-on ferrite clip for keeping RF out of keyboards/mice and other Shack perhiperals. A few ..
£1.85
If you're in need of a mains filter or ad-hoc RF choke, this snap-on 31-mix ferrite is for you. ..
£14.75
A 5mm Snap-on ferrite clip for keeping RF out of keyboards/mice and other Shack peripherals. Works w..
£1.00
A small ferrite toroid for use in baluns and line-isolators. This is 31-mix in the smaller 1.14" (29..
£3.00
A small ferrite toroid for use in baluns and line-isolators. 8 turns of RG174 (100w) or RG316 (400w)..
£3.25
A small ferrite toroid for use in the G3TXQ 1:4 CobWeb balun.
175w AM/Digi, 250w SSB (assuming..
£3.50
This 43-mix ferrite has found popularity in End-Fed Couplers as its size is ideal for use with a 100..
£5.75
For use in baluns and chokes/isolators. More than enough for UK legal power so perfect for your QRO ..
£7.85
For use in baluns and line-isolators. More than enough for UK legal power so perfect for your QRO ba..
£7.50
A large ferrite toroid for use with a QRO CobWeb balun (2 ferrites are required if you're making you..
£12.95
For use in baluns and chokes/isolators. More than enough for UK legal power so perfect for your QRO ..
£11.25
A larger-than-life FT290 (2.9", 73mm diameter) ferrite. Can be used for baluns/chokes that use..
£15.00
A micro ferrite toroid for the QRP operator - this is perfect for small Baluns/Chokes and End-Fed ..
£1.65
A flat-core ferrite used for making coaxial "patch-lead" chokes as detailed in GM3SEK's "In Practice..
£4.75
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