Isn’t the full deflection voltage supposed to be standardized?
You would hope so but this technology goes back decades.
The KI525 is the most modern HSI in common GA use but it dates back to around 1978. The user manual which came with the TB20 in 2002 was dated 1980. The latest MM is 2002. Other HSIs are much older.
The KI525 is the most modern HSI in common GA use but it dates back to around 1978
What are you trying to imply? That there were no standards in the 70ies?
Hence, the emergence of the EHSI in GA with Sandel leading in the 80s – 90s and of course Garmin and Aspen taking over in 2K
It was only with the Aspen that you got a significantly cheaper route to the functionality, but they had a lot of problems in the early years. A friend of mine is on his 4th one. Sandel is a high grade product, not cheap, and they sell a lot into the turbine heli market, and to the military. The SN3500 is the most sunlight readable instrument in my panel.