Micrometals
Iron Powder Toroid T37-2: Radio Frequency core for HF Baluns or Output
Transformers of Power Amplifiers.
Popular for amateur radio applications with typical frequency range from 500hz up to 30MHz: Broadband frequency range 200 to 400 MHz.
Outside Diameter (OD) 9.53 mm
Inside Diameter (ID): 5.21 mm
Height (Ht): 3.25 mm