Devin (N9DRB)
K3ALA@N9DRB you know most tuners have a minimal wattage they'll take it might be more than your rig is putting out. There is such a thing as a qrp tuner and my guess is you won't experience the same kind of insertion loss that is probably making it hard for the nanovna to function
@K3ALA
That is what I was thinking. I think I remember reading somewhere that this tuner has something like a 10W minimum. I don't know what sort of signal the network analyzer produces but it can't be much.
That is what I was thinking. I think I remember reading somewhere that this tuner has something like a 10W minimum. I don't know what sort of signal the network analyzer produces but it can't be much.
Andreas, DJ3EI, he/him@N9DRB
Not entirely sure what you mean with "dial in". Speculation: Twiddle the knobs of your manual tuner while watching your VNA to achieve minimal SWR with your chosen antenna, before replacing the VNA with the actual TRX. Is that what you try to do?
If yes, what could go wrong?
Strong signals coming in from the antenna might confuse your VNA.
@dj3ei
Yes, that is what I was trying to do. However, turning the knobs on the tuner produces no change on the VNA's plot. The plot remains quite steady.
Yes, that is what I was trying to do. However, turning the knobs on the tuner produces no change on the VNA's plot. The plot remains quite steady.
@N9DRB
That's weird.
What did you have connected to the other end of the tuner? You could try connecting a heavy duty resistor of 200 Ω or 10 Ω or a normal 50 Ω dummy load. Then use the regular TX + SWR meter at low power to bring the SWR down. Now replace the TX with the VNA and see what SWR it displays, at the same frequency.