Quote:
Originally Posted by HighHopes
...In an AM radio, the alignment can be done without using exact frequencies. I seem to remember tuning the local oscillator for 540 KHz (tuning cap closed) on the dial. And then the oscillator trimmer cap for 1600 KHz (tuning cap open). It didn't really matter exactly what the IF frequency was, as long as it was peaked. The point is that things could be approximately on frequency and all was well.
|
Actually if the IF is incorrect in a broadcast band AM radio, it will cause the tuning range on the main dial to be either too wide or too narrow.
Its being 'approximately' correct is probly good enuff in most cases.
In a TV with split IFs, you definitely want the sound IF to be correct for the sound to track correctly with the pic.