04-25-2016, 01:48 AM
If you can't find the correct 8-inch field coil speaker, it is possible to replace it with a common 8-inch permanent magnet speaker. You still need an output transformer, but you can buy a suitable one from someplace like Edcor, https://edcorusa.com, or AES, https://www.tubesandmore.com.
However, you would have to substitute something suitable in place of the field coil in the power supply circuit. Often a power resistor is used. A choke is a better substitute, if you can find one that's similar to the field coil of the speaker. Look at Edcor and also at Play Things of Past, http://www.oldradioparts.com.
However, you would have to substitute something suitable in place of the field coil in the power supply circuit. Often a power resistor is used. A choke is a better substitute, if you can find one that's similar to the field coil of the speaker. Look at Edcor and also at Play Things of Past, http://www.oldradioparts.com.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
