Which scale on a SWR meter?
- Thread starter Andrew_Trayfoot
- Start date
PaulRainbow
Well-known member
The top scale is SWR
If you're not sure what's what look in the manual, should be one online if you don't have it.
If you're not sure what's what look in the manual, should be one online if you don't have it.
Andrew_Trayfoot
Active member
Thanks Paul.
So 2.5 is bit on the high side, but not horrendous..
So 2.5 is bit on the high side, but not horrendous..
PaulRainbow
Well-known member
Looks like you are transmitting at 2w Andrew, what do you get at 25w ?
Andrew_Trayfoot
Active member
Will have to check next time I'm down at the boat.
Martin_J
Well-known member
Is there a switch on the meter that you can flick from SWR (or REFlected power) to just measuring power?
And maybe even a switch to calibrate (sometimes labelled SET), so that you can zero the needle first?
And maybe even a switch to calibrate (sometimes labelled SET), so that you can zero the needle first?
Martin_J
Well-known member
Andrew - I have just looked up your Zegati SWR meter on Nevada radio...
It would appear that their description (and similar descriptions on a few other websites), implies that this meter does NOT measure power.
It would appear that their description (and similar descriptions on a few other websites), implies that this meter does NOT measure power.
Martin_J
Well-known member
With that in mind - I would turn the dial to the left, then briefly (on an unused channel) transmit with the switch in the SET position. Whilst transmitting, the dial can then be used to 'zero' the needle. Stop transmitting.
The switch can then be moved to the 'ROS' position and a further brief transmission used to read the SWR from the top scale.
ROS might be Italian or French for SWR - but think of it as Reflected Outgoing Signal ratio for ease..
The switch can then be moved to the 'ROS' position and a further brief transmission used to read the SWR from the top scale.
ROS might be Italian or French for SWR - but think of it as Reflected Outgoing Signal ratio for ease..
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Martin_J
Well-known member
Or is SET (Calibrate) usually on the infinity symbol? - It's usually marked on the scale.
Martin_J
Well-known member
The link below is to a short, 23 second video (on OneDrive) that I made (albeit on a meter with Power, Calibrate and SWR settings) showing measurements of forward power, reflected power, then a calibration (to top end of the scale) and finally an SWR reading.
https://1drv.ms/v/s!AoaL0Fl7hXvVrQMtmrm8nC6FNZLI?e=gGHZgv
https://1drv.ms/v/s!AoaL0Fl7hXvVrQMtmrm8nC6FNZLI?e=gGHZgv
Daverw
Well-known member
2.5:1 a bit higher than you want but not enough to damage radio, as said above you need to do this at full power as it makes quite a difference
