Quote:
Originally Posted by Jeffhs
... I realize the H511 series was one of the best series of table radios Zenith made in the mid-1950s and, therefore, the sets used high-quality components, but I can't for the life of me see how the filter capacitor would make any difference as long as it does its job. Did the non-inductive Zenith filter caps do a better job than ordinary caps of filtering noise and hum from the output of the rectifier tube, or would there have been a risk of damaging said rectifier tube if a standard filter capacitor (without the additional components I mentioned) was used?  |
Odds are that modern electrolytic caps would do fine. Zenith likely needed the cap to be low inductance to act as RF bypasses to ground. To keep RF and or IF signals from leaking back to adjacent stages, which may cause undesired oscillations.