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Doesn't the astro plane have a horizontal component to it? Maybe the astro plane isn't as good as you think?

DC ground, is a path for static charge buildup to dissipate. DC ground, will not solve RFI, which I suspect is your problem.

Yours look legit. The ones I got were remarked with laser etch and were fake.

This stuff, is out of my analog kid realm. I do like what the DDS VFO people are doing with the 980 SSB though. Seems simple enough, except for the Brazil guy/Troy radio collaboration 980 SSB vaporware, that will never be seen.

I have a Motorola SSB mobile. I would rather have a Uniden, Hitachi or Cybernet. Overengineered, cheesy, kind of a pain to work on, like most things Motorola. Nothing great about them.

I bought 5 of these, from a seller that was supposed to be in the US, from eBay. I received 5 remarked fakes from China. This was April 2021. I have to wonder where they would be getting legit chips from.

Mark was on here too at some point. He seems to have fallen off the edge of the planet, when his buddy Mike (Mike's radio repair) also vanished.

A little hard to tell the lass, but I think I see a simple clamping diode AB arrangement. It's that, or a class C based on the 220uH choke is see next to the input xfmr. Typical standard CB radio drive levels. Yes on 10m. It has real Toshiba 2879's, so the price is worth it.

It never ceases to amaze me, how these companies throw things together, to make a buck. The power transistors in your amp, are not designed to operate in the frequency range, you would like. They are UHF parts, for the Motorola UHF radios, in the 450-512 MHz range. I can't recall if it is...

I think if you take a photo of the microphone with the back off I could probably figure it out visually.

I looked at a schematic. Unfortunately, that info is not given. You will need to either copy it from another microphone, or use an ohm meter and figure it out.

1=Mic audio, 2=shield, 3=T/R (tied to 2) 4=TX It is the same as the Telsat SSB-50

The correct part is IRFZ24

I concur, looks like the old SS-3900

No way to know by the photo, other than it is someone's modification. If you take a photo of inside, that may shed some light on what it is doing.

The last photos of the Pride and the Gray, were to show that the Gray is pretty much a clone of the Pride. The ONLY difference between the two, is the input attenuator and the front panel switches. The main and daughter PCB's are almost exactly the same.

Wow.....shameless

It has a bunch of yellow wires that are not teflon, but not in a rats nest like the one you show. If you look at the AM LED in your photo, you can see it is tied to the pre-amp switch. I think this is how they did it, half assed. I am going to re-purpose the AM LED as a TX indicator, rather than...