[R-390] TUO Transmitter info

[Richard Green]

I realize this is not R390..... but it is BA related.
I have a National TUQ transmitter that was in widespread use by the FAA many years ago. It uses a pair of 809's modulating 4-65's. Does any one have a schematic or info on this beast? I have tried the usual suspects like Fair Radio, posting on the AM Forum, etc. I know many of these got parted out over the years--I now know where some of the transformers I am using as doorstops came from!!
Skip Green