04-04-2006, 09:26 PM
The Model 38-5 used two speakers, one in the table top, or B cabinet and another in the console, or X cabinet.
The B cabinet uses a Model H-29 speaker.
The X cabinet uses a Model K-39 speaker.
Both speakers have the same field coil which has a D.C.
resistance of 660 ohms. Both also have the same voice
coil impedance of approximately 2 ohms at 400 Hz.
A PM speaker of 4-8 ohms should work just fine however.
A replacement power resistor to sub for the field coil can
be a 680 ohm, 10 watt unit to run cool.
This is assuming a max current of 90 mA.
Alternatively, you could starts looking for a H-29 or K-39 to fill the bill.
The Model 38-3 and 38-4 also used the H-29 speaker.
The B cabinet uses a Model H-29 speaker.
The X cabinet uses a Model K-39 speaker.
Both speakers have the same field coil which has a D.C.
resistance of 660 ohms. Both also have the same voice
coil impedance of approximately 2 ohms at 400 Hz.
A PM speaker of 4-8 ohms should work just fine however.
A replacement power resistor to sub for the field coil can
be a 680 ohm, 10 watt unit to run cool.
This is assuming a max current of 90 mA.
Alternatively, you could starts looking for a H-29 or K-39 to fill the bill.
The Model 38-3 and 38-4 also used the H-29 speaker.
Chuck Schwark,
The Philco Repair Bench
[Image: http://www.philcorepairbench.com/images/philog3tiny.gif]
http://www.philcorepairbench.com
