The first column (P-to-P) of the table gives the available Plate-to-Plate load impedances. The second column (P-B-B-P) gives the primary terminal connections. The rest of the columns give, at the top, the secondary terminal connections, and below, the corresponding secondary impedances.
Example: Couple 6600 Ohms Plate-to-Plate load impedance (modulators) to an RF load of 11000 Ohms. We find 11000 Ohms under column B-E opposite primary impedance 6600, marked 1-2-5-6. This gives the following terminal connections:
P - Connect to terminal 1
B - Connect to terminal 2
B - Connect to terminal 5
P - Connect to terminal 6
Secondary - Connect to B and E
P represents the connections to the plates of the modulator tubes and B the connection to the modulator high voltage supply (B+). The two B connections can be jumpered at the mod transformer and only one wire run to the B+. On the secondary either B or E can be connected to the final amplifier high voltage supply and the other to the final amplifier plate.
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