1:1 μBalun QRP
£18.00 £15.00
4:1 Current Balun
£55.00 £50.00
9:1 UnUn 250w
£45.00 £40.00
End-Fed Half-Wave Coupler
£42.00 £35.00

Ferrite Toroid FT140-61

Ferrite Toroid FT140-61
Brand: Fair-Rite
Product Code: HG-FT14061
Availability: 31
Price: £3.50
Qty:     - OR -   Add to Wish List
Add to Compare

A small ferrite toroid for use in the G3TXQ 1:4 CobWeb balun.

  • 175w AM/Digi, 250w SSB (assuming an ideal match)
  • 35.5x23x12.7mm, 1.4x0.9x0.5in
  • Fair-Rite 5961002701 , 61-mix material

If you are building a general-purpose (7-30MHz) 1:1 balun/choke or line-isolator, use the FT140-43 for QRP-100w) or FT240-43 which is more than adequate for UK 400w limit.  We do NOT recommend using the 61-mix for normal choke/baluns.

Toroid sizes/types are easy to ID, the "140" translates to 1.4" (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...

Cookies may be stored on your computer by this site for the purposes of auto-login and checkout