roWaves Technologies
Certified Company ISO 9001-2008
Wurth Elektronik 4W620 | 74270191
Colour code: black/grey
Permeability (μi): 620
Frequency range: 1 – 20MHz (wideband BalUn, depends on the application)
Price :
€ 15,10 (excl. VAT)
Usable frequency ranges, depending on the application:
broadband transformers: 1 – 30 MHz
RFI / EMI / CMC suppression: 1 – 20 MHz
An impedance> 1000Ω (for operating frequency) is sufficient for most applications. The coils should be made with very good quality RG-58 coaxial cable. Any high quality RG-58 coaxial cable can allow 1kW power in 160 / 80m. For higher bands> 10MHz, it is recommended to use the additional teflon insulated coaxial cable to keep the losses low.
According to the table below, for Wurth Elektronik 74270191 (our case), between 6 turns (80/40 / 20m) and 10 turns (160m) would be enough to obtain an impedance of at least 800-1000Ω, from 1.8 – 14MHz .
Technical data-sheet: 
Additional information
| Weight | 175 g |
|---|---|
| Dimensions | 6,1 × 6,1 × 2 cm |
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