Guru
Joined: 05/03/2018
Location: NetherlandsPosts: 6101
| Posted: 02:53pm 27 May 2022 |
Lew247,
When the tda9800 is removed, this pin most likely is just a pin. Maybe that pin is connected to the output of the log amplifier that has replace the 9800. Sounds logical.
For your project, where the tuner is used to look at a 4MHz spectrum, an audio output (200kHz bandwidth) does not make sense. And a demodulated audio output, with 15kHz bandwidth is even more unlikely.