Midland output

[Delivers1234]

Yes. No 90. I guess that’s all
Midland has for power.

10 gauge it is.

I looked up the website for your SWR meter.

SW-102 125-525MHz connector V.S.W.R. POWER METER | SURECOM

SW-102-UV Digital VHF/UHF Power & SWR Meter & Frequency counter V.S.W.R. meter IntroductionVSWR. Forward and reflected power direct digital readout, without any calibration.Maximum measurable power range up to 120W.low insertion loss (0.3 decibels or less) structure allows it to be permanently...

www.surecom.com.hk

If you look down near the bottom, it suggests there is a way to get into the menu of the device and adjust the calibration.
I'm NOT saying you should do that.
Only saying that even they give the option for the end user to do some sort of calibration. But you'd need to have the equipment to do that. I wouldn't mess with it. Just pointing out that it's an option.

So, could be the radio is out of whack.
Could be the meter is out of whack.
Could be that it's a combination of both.

If the radio works and you can communicate the way you want, then I might be tempted to call it good.

30 amp fuses on both wires?

https://a.co/d/4VYJ047

 

[mmckenna]

30 amp fuses on both wires?

https://a.co/d/4VYJ047

No, only on the positive.

When you hook it up, your negative lead should not connect to the battery negative post. Ideally find a grounding point close the radios. If you can't, find where the negative terminal from the battery is grounded to the vehicle body.

 

[Delivers1234]

No, only on the positive.

When you hook it up, your negative lead should not connect to the battery negative post. Ideally find a grounding point close the radios. If you can't, find where the negative terminal from the battery is grounded to the vehicle body.

Thank you.

Is it okay to run insulated 10 gauge wire next to the harness of a vehicle on that same giant grommet? In the picture it’s above the horizontal ac condenser against the firewall.

 

[mmckenna]

Should be fine.