Baluns and Ferrites

Baluns, Chokes, Isolators, UnUns and Ferrite Toroids for HF+VHF. We offer the best prices for FT140-43, FT140-61, FT240-31, FT240-43 and FT240-61 toroids in the UK - perfect for your balun projects.  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, 8 turns of coax on an FT240-31 will suffice.  Coax can be RG316, RG58, RG8 "mini" or RG142 depending upon your power requirements.

Ferrite Toroid Chart

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1:1 Balun 100w
A general-purpose 1:1 Current Balun for use on HF with your 100w transceiver.  This design uses..
£38.00 £32.00
1:1 Balun 400w
It's a bit of an animal - actually, it's a lot of an animal -  A 1:1 Balun for use on HF (1.8-3..
1:1 μBalun 100w
A 1:1 "micro" Balun for use on HF (best suited for 7-30MHz) for when you're out portable or need a l..
£17.00 £15.00
31-Mix Snap-On Ferrite
If you're in need of a mains filter or ad-hoc RF choke, this snap-on 31-mix ferrite is a serious ite..
4:1 9:1 16:1 UnUn 250w
A multi-ratio UnUn for use on HF (1.8-30MHz) with up to 250w RF power.  Sometimes, a single rat..
£40.00 £35.00
4:1 Current Balun QRO
A 4:1 Current Balun (Guanella) for use with OCFD, Loops and other situations where your aerial is ar..
£48.00 £45.00
5mm Snap-on Ferrite Clip
A 5mm Snap-on ferrite clip for keeping RF out of keyboards/mice and other Shack peripherals. Works w..
9mm Snap-on Ferrite Clip
A 9mm Snap-on ferrite clip for keeping RF out of keyboards/mice and other Shack perhiperals. A few l..
Choke / Line Isolator 400w
A 1:1 Choke/Line Isolator for use across HF frequencies and handles up to 1kW RF power (assuming 1:1..
Choke Balun for ATU/G5RV 400w
This is a no compromise solution.  A robust 1:1 Choke Balun for use with a Doublet or G5RV wher..
£45.00 £40.00
CobWebb Balun Box
The CobWebb is a popular antenna due to its small size - it's a 5-band HF aerial, under 8ft square, ..
£60.00 £55.00
End-Fed Half-Wave Coupler
The End-Fed Half-Wave is a popular choice for simple /P operating but can also be used equally well ..
£35.00 £32.00
Ferrite Toroid FT140-43
A small ferrite toroid for use in baluns and line-isolators. 8 turns of RG174 (100w) or RG316 (400w)..
Ferrite Toroid FT140-61
A small ferrite toroid for use in the G3TXQ 1:4 CobWeb balun. 175w AM/Digi, 250w SSB (assuming..
Ferrite Toroid FT240-31
For use in baluns and chokes/isolators. More than enough for UK legal power so perfect for your QRO ..
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