Coax impedance for vfo signal between raduino and bitx boards.

Cory Clemmer All Messages By This Member #24498 I am planning to use thin coax for the Raduino vfo output, what would be better 50, 75, or maybe 90 ohm?
MVS Sarma All Messages By This Member #24504 For short lengths of coax at HF? (not VHF or UHF) it wont matter what you use. the load impedance gets applied ? to the source toggle quoted message Show quoted text On Tue, Apr 4, 2017 at 10:54 PM, Cory Clemmer <cclemmer@...> wrote: I am planning to use thin coax for the Raduino vfo output, what would be better 50, 75, or maybe 90 ohm? -- Regards Sarma ?
MVS Sarma All Messages By This Member #24505 here is the linked info. What is the cable impedance and when it is needed? The basic idea is that a conductor at RF frequencies no longer behaves like a regular old wire. As the length of the conductor (wire) approaches about 1/10 the wavelength of the signal it is carrying - good ol' fashioned circuit analysis rules don't apply anymore. This is the point where things like cable impedance and transmission line theory enter the picture. Read more at: sarma ?vu3zmv toggle quoted message Show quoted text On Wed, Apr 5, 2017 at 12:10 AM, Mvs Sarma <mvssarma@...> wrote: For short lengths of coax at HF? (not VHF or UHF) it wont matter what you use. the load impedance gets applied ? to the source On Tue, Apr 4, 2017 at 10:54 PM, Cory Clemmer <cclemmer@...> wrote: I am planning to use thin coax for the Raduino vfo output, what would be better 50, 75, or maybe 90 ohm? -- Regards Sarma ? -- Regards Sarma ?

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Coax impedance for vfo signal between raduino and bitx boards.