Inspect the speaker for bodily injury. Replace if open up.
A present day long-lasting magnet speaker can be substituted for an aged discipline coil speaker, but a energy resistor of abut 1500 ohms, 20 watts should be additional to change the subject coil. Once you get the established operating, you can substitute the old tubes a person at a time to see if the set carries on to play.
five. Assuming that (4) labored, go just one tube back up the signal chain at a time, touching grids and listening for clicks. one. Use a battery or ohmmeter to confirm that the speaker clicks when electricity hits it. When the clicks cease, that tube or the circuitry all-around it is negative.
However, if a resistor reads way as well substantial, you will not have to hassle disconnecting it for testing as it is unquestionably negative. Measure the tube pin voltages for plate higher, cathode minimal and grid considerably less than cathode.
Look into my blog sexy Chat webcam