FT240-52, ID=1.4", RFI Range 200-1000 MHz
Product Details
RFI Range (MHz): 200-1000 Mhz
ID-B (in/mm): 1.4/35.6
OD-A (in/mm): 2.4/61
Height-C (in/mm): .5/12.7
Weight (oz/gm): 106 grams
Initial permeability: 250
A(L): 325
Inductor Range (MHz): < 30
Transformer Range (MHz): 1-60
Case/Box lot size: 100
for transmission line transformers, RFI suppression - Jerry Sevick book most used mix
12:1 Ununs are useful between coax and long wires with a load impedance near 600 ohms like a beverage antenna. Shortwave listener antennas also can benefit with the 12:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier.