Zenith roundie

[Electronic M]

Originally Posted by Robert Grant

The strong buzz is Zenith's trademark sound identifying the set as a Zenith.

As for the tuner, just adjust the channel 3 tuning slug, since you'll always be using the set on channel 3 and changing the program using an external source (converter box, DVD, VCR, Roku, lo que sea).

If the modulator is putting out a correct signal, the IF/sound IF alignment is correct, there are no significant circuit issues and the buzz control is set correctly Zeniths are capable of excellent buzz-free audio.

One sei I have where the buzz control doesn't completely kill the issue I've found that on a tube RF modulator I have that has adjustable Audio carrier freq I can adjust that modulator to make good audio on the set (I may adjust its audio alignment in the future).

If the vertical buzz is in the speaker check the filtering, if it is there with the speaker disconnected then the vertical may have issues...Though some vertical systems just like to buzz more than others.