Radio repair and restoration ZENITH Model 5808 with 8-S-463: In this Episode we discuss what's a safety capacitor? How to select correct safety capacitor and Fuse for your tube radio and what type of safety capacitor to select. There are TWO basic types of Line Filter Capacitors”, namely “across-the-line” capacitors and “line-to-ground” (line by-pass) capacitors. Line filter capacitors are hardworking capacitors and operate under very harsh conditions.
They can short or explode since they have to handle 110-120 volts on a steady and ongoing basis.
Depending on where the on-off connection is located in the radio circuit, the line filter capacitor(s) may be working even with the radio is turned off.
Yes, if the on-off connection is located after line filter connection your filer caps will be working 24 hours a day, 365 days a year (as long as your radio is plugged in). Keep your radio unplugged when not in use.
Over and above the ongoing 110-120 VAC, there are lighting storms/strikes and power surges and spikes in your power lines!
Line filter capacitor has to be able to withstand ongoing high voltages and voltage surges and spikes for years, and if it fails, it should not explode, catch fire or put people at risk of shock.
They designed to safely handle these steady high AC voltages and surges. Should they ever fail, they are designed to fail in a “safe way”.
There are TWO basic types of Line Filter Capacitors” they are called (AC rated safety capacitors)
• “across-the-line” capacitors should be replaced with type X2, Y2, or X1/Y2 safety capacitors.
• “line-to-ground” capacitors should be replaced with Y2 or X1/Y2 safety capacitors. (do not use X2 type).
• Also there are ceramic disc safety capacitors that is a combination of X and Y classes. For example, an X1/Y2. This simply means that the capacitor meets safety qualifications as both an X1 capacitor and an Y2 capacitor. We will discuss how to repair Vintage Zenith console tube radio.
21 янв 2024
