15-pin Analog PC joystick compatibility on Amiga

[Motormouth]

Are all 15-pin Din Analog PC joysticks compatible on the Amiga?
Back in the day I built a 15-pin to 9-pin analog joystick adapter.
I used it together with an old 80s era analog PC joystick to play F-15 Strike Eagle II.

After 20 odd years, I got the itch to try F-15 Strike Eagle II with Whdload.
I found my homemade adapter, but cannot find the old PC joystick.

So I attempted to use a logitech joystick (circa late 90's-early 2000's), one of the last made with a 15 pin DIN.  however it did not work with the homemade adapter.  The potentiometer values coming out of the thing don't make any sense (does not seem linear at all) only sub 1 volt.  
The joystick works fine with the PC.  
I tried a late 90's joypad (analog controller that acts digitally, ie fixed potential values).  The values on the amiga using this joypad seem to be reasonable (ie close to the full 0-5 volt range).
Further the 15-pin to 9-pin adapter ohms out properly.

Did PC joysticks changes from the late 80's to late 90's are the potentiometers different in these later joysticks??

What Analog PC joysticks (or what years) are compatible with Amiga?

[Chieftain]

The Suncom F-15E Talon and Hawk sticks works flawless, both were released in the late 90s (ca.
'96 or '97)
The Talon sits in parallel with your keyboard and have four banks of programmable buttons, including two hat switches, but you'll need a pc keyboard adapter to use these on an Amiga.

[QuikSanz]

Are all 15-pin Din Analog PC joysticks compatible on the Amiga?
Back in the day I built a 15-pin to 9-pin analog joystick adapter.
I used it together with an old 80s era analog PC joystick to play F-15 Strike Eagle II.

After 20 odd years, I got the itch to try F-15 Strike Eagle II with Whdload.
I found my homemade adapter, but cannot find the old PC joystick.

So I attempted to use a logitech joystick (circa late 90's-early 2000's), one of the last made with a 15 pin DIN.  however it did not work with the homemade adapter.  The potentiometer values coming out of the thing don't make any sense (does not seem linear at all) only sub 1 volt.  
The joystick works fine with the PC.  
I tried a late 90's joypad (analog controller that acts digitally, ie fixed potential values).  The values on the amiga using this joypad seem to be reasonable (ie close to the full 0-5 volt range).
Further the 15-pin to 9-pin adapter ohms out properly.

Did PC joysticks changes from the late 80's to late 90's are the potentiometers different in these later joysticks??

What Analog PC joysticks (or what years) are compatible with Amiga?

I have a couple of old Quikshot sticks that work well but the pots need replacing. Won't hold center on trim.

Edit: I hooked up an old Thrustmaster Stick that works however trim looks to be only done with software. Analogue was plugged in, not the DIN plug.

[Motormouth]

Thanks for the input  especially the 15-pin kind :-P  (ok that was a bad joke)

I found an article that seems to explains everything:

https://sites.google.com/site/joystickrehab/analog-vs-digital

According to the above web page:
many of the The 15-pin (analog) joysticks started to use mixed analog and digital signals over the same single lines even (in the mid 90's) by the late 90s analog style joysticks became fully digital (basically USB devices, even the 15-pin ones).  This explains the "odd" behavior I was seeing out of the my logitech extreme (it is fully digital sending its usb compatible signals over 15-pin input).

It looks like I need to get a truly "analog" joystick.  luckily the same web page talks about which are which.