[Boatanchors] Patterson Power Supply Help Needed

[Joe Connor]

I just picked up a nice Patterson PR-10 receiver but there is no speaker. Originally, it had an electrodynamic speaker and a field coil. The schematic is here: 

http://www.nostalgiaair.org/PagesByModel/091/M0013091.pdf

I want to substitute a PM speaker because I don't have much choice. The schematic lists the field coil at 1.5K ohms. My plan is to change the filter caps and substitute a 3K/10W resistor for the field coil just to see if the receiver works. Does the sound reasonable? The two original filter caps are 8 mfd. Should I up the second one to 22 mfd for better filtering now that there is no field coil or am I better off adding a second 3K/10W resistor and a third 10 mfd filter cap?

I've read about these types of substitutions but have never had to do one.

Thank you for your help.

Joe Connor