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Re: Measuring Impedance for the 433 MHz RTL-SDR Antenna


 

Whoops!

(first picture, antenna is on the left)

On Friday, March 7, 2025 at 12:31:47 AM GMT+2, W0LEV via groups.io <davearea51a@...> wrote:

No images attached.

Dave - W?LEV

On Thu, Mar 6, 2025 at 8:22?PM kellogs via groups.io <mihai0226=
yahoo.com@groups.io> wrote:

? Hi,
i am trying to get a grip on using the nanoVNA. Does anybody have the 433
MHz antenna + base from the RTL-SDR kit ?

Firstly calibrated at device port (no cable), then measured the loaded
monopole through its magnetic antenna base at 433 MHz (first picture,
antenna is on the left):? Nooelec - Nooelec NESDR SMArt v5 Bundle -
HF/VHF/UHF (100kHz-1.75GHz) RTL-SDR Kit with 3 Antennas. RTL2832U &
R820T2-Based Software Defined Radio

Mounted on car hood:? 8 ohm at resonanceMounted on bicycle:? 7.5 ohm at
resonance
Does it sound right ?









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*Dave - W?LEV*


--
Dave - W?LEV

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