I do not understand why a good 75 ohm calibration load would not make the thing be a 75 ohm test.
Isn't that what the 50 ohm one is doing when you calibrate the dead short and the 50 ohms load?
Joe WB9SBD
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On 7/1/2021 8:41 AM, Zack Widup wrote:
I know. That's a problem in this application. Another possibility is a
broadband impedance matching transformer with the appropriate ferrite
toroid. I calculate 12 turns on the 75 ohm side to 10 turns on the 50 ohm
side as close enough.
73. Zack W9SZ
On Thu, Jul 1, 2021 at 8:15 AM KENT BRITAIN <WA5VJB@...> wrote:
Quarter wave transformer for what frequency????
54 MHz or 600 MHz. Can't have both!
73 Kent WA5VJB
Minicircuits does sell broad band 50-75 Ohm transformers.
On Thursday, July 1, 2021, 07:39:00 AM CDT, Zack Widup <
w9sz.zack@...> wrote:
The best way would be to use a quarter-wave section of 62 ohm cable.
Lacking that, you may have to build some sort of antenna tuner.
73, Zack W9SZ
On Thu, Jul 1, 2021 at 7:13 AM Mikek <amdx@...> wrote:
Testing a couple of TV antennas for Signal strength and just curious
about
what they might look at on the NanoVna.
I'll be looking at them through about 70 ft of RG-6 and a SMA to F
adapter.
Measuring from 180MHz to 610MHz.
Pretty much a novice here.
Mikek
