RX1, RX2 Noise bridge calculator

This calculator solves for some interesting results from the measurements using a VK3AQZ RX1 Noise Bridge.

R (Ω)
C (pF)
Frequency (MHz)
R0 (Ω)
Rexp (Ω)
Z (Ω)
Y (S)


Input fields

Note that the use of an expander resistor (say 200Ω) is popular with these type of instruments, in fact some have a built in resistor with switch. Whilst it does enable an expanded measuring range, it does that at the expense of accuracy. Do a check by varying the inputs a little in the calculator to determine sensitivity of results to small measurement errors.

Output fields

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© Copyright: Owen Duffy 1995, 2021. All rights reserved. Disclaimer.