1:1 Balun 400w
£55.00 £50.00
4:1 Current Balun
£55.00 £48.00
9:1 UnUn 250w
£40.00 £35.00

Ferrite Toroid FT240-61

Ferrite Toroid FT240-61
Brand: Fair-Rite
Product Code: HG-FT24061
Availability: 10
Price: £14.35

2 or more £13.50
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A large ferrite toroid as used in our QRO CobWeb balun (2 ferrites are required if you're making your own) and also used as part of G8JNJ's UnUn tests.  This ferrite is not suitable for general-purpose baluns/chokes across HF - use a 31-mix or 43-mix.

Yes, these are quite pricey compared to their 31+43-mix cousins!

  • Size: 60.0x35.5x12.7mm, 2.4x1.4x0.5in
  • Fair-Rite 5961003801 , 61-mix material

Toroid sizes/types are easy to ID, the "240" translates to 2.4" (diameter) and the "61" is the ferrite mixture. What type do you need? 61 is used for the G3TXQ CobWebb balun, 43 is good from 7MHz and up (and a good general-purpose 7-30MHz solution) while 31 is good for lower HF bands. Remember, you can stack the cores for increased choking and power-handling. As always, ratings need to factor in the aerial (SWR) match and duty-cycle.

See our video on Ferrite Toroids and Baluns here...

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