Re: 1947 Radio

Posted by Tim Cole On 2013/12/19 17:11:41

Absolutely not DOA.

If you look at the wiring diagram for the radio the lamp is before the radio vibrator and high voltage power supply.

If the vibrator is working you should hear a low pitch hum.

If you don't hear a thing go to the 7Y4 rectifier tube and check the voltages as per the chart. If there is no voltage then the power supply needs work.

If there is nothing a new solid state vibrator might just bring the whole unit into working order.

The vibrator is a mechanical device a highly subject to failure.

Hope this helps.

After that follow the voltage chart in the wiring diagram
to isolate where there is an open/faulty component.