08-26-2013, 04:15 PM
I would certainly stay with the PM speaker after looking at all the changes necessary to "downgrade" the radio to the EM speaker. Sounds like all you need is the rating on the 300 ohm and your back in business. Do you have a picture of the old 300 ohm? Size would give us a clue. Someone must have an idea. I doubt it is more than 5 watts. That of course is an uneducated guess.
If you have some 1 watt resistors, tack three together (1K ohms) should give you 330 ohms at 3 watts. Hook your meter across them and turn the radio on and measure the voltage drop as indicated. As indicated, don't leave it on forever, just long enough to get the radio playing. Might also at the end of measuring feel how hot the resistors got.
Jerry
If you have some 1 watt resistors, tack three together (1K ohms) should give you 330 ohms at 3 watts. Hook your meter across them and turn the radio on and measure the voltage drop as indicated. As indicated, don't leave it on forever, just long enough to get the radio playing. Might also at the end of measuring feel how hot the resistors got.
Jerry
A friend in need is a pest! Bill Slee ca 1970.
