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OK, that switch in the underside is for relay/electronic switching. It the mic was previously wired for an older relay switched radio, that will need to be flipped.
This is the wiring for a cobra from an old Turner mic wiring sheet. Look at the 3rd column and you'll see the 25 or the next one...
Since it's missing, you KNOW it's been messed with. I'd say it needs a complete alignment. L45, L46, L47, L48, and L38 are together in the transmitter alignment section. My guess is they all need to be looked at.
Here is the service manual...
The Galaxy Plus is almost the same radio as the saturn and the schematic should steer you in the right direction.
https://www.worldwidedx.com/ims/galaxy-dx-radios-galaxy-plus.224/
If you're talking about the "key test" he did, that's fine. They were tested with a 20:1 swr at Cobra for something like 20 minutes. I can't remember exactly, but I was pretty shocked. It was in the 148 GTL manual somewhere.
It uses the PC-385 main board.
Alignment locations:
https://www.radiomods.co.nz/alignments/pc385align.html
Here is the block diagram from the Uniden Washington with the same board.
It looks like your car radio is a double DIN sized radio. That would allow you to install an aftermarket single DIN on top with the AnyTone on the bottom into the dashboard.
As for your situation... from what I can tell it looks like your stereo tapers down towards the bottom, so I don't know...
This is the mosfet that board is designed around.
https://www.st.com/resource/en/datasheet/sd4933.pdf
It's a 50v device with a minimum of 40v. That's where they got the 1200 watt rating from in the add.
At 40v it's rated at 300 watts per device, and at 50v it's rated at 400 watts per device.
That sounds to me like it was aligned to spec. USB is supposed to be 1.5kc up and LSB is supposed to be 1.5kc down, but that's not how CBer's run. They want it on the zero, no matter what.
No, no, no... that was the gain when they were installed. As soon as you start using them, the gain drops. You'll need to pull out, at the very least, it's companion and measure it to see what the current gain is. If it were me I would test all of them to be sure they are still good.
I'm gonna stick with my dinosaur like equipment that works just fine. 35 year old Pluto and a TWO THIRDS KILLOWATT 667V. I might kick the sweet sixteen on every now and then for giggles.
The radio provides power to the stock mic on pin 6. I don't know if not connecting that would allow the use of an Astatic mic or not.
Otherwise the wiring would be:
1. White
2. Black
3. Red
4. Not Used
5. Blue/Shield
6. Power from radio (not used for aftermarket mic)
The mic may also not be...
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