But in deference to putting a finer point on the whole equation, the transmitter standby circuitry (including relays, tube warming, etc.) was powered by 12 volts directly from the batteries; when the transmitter was activated, it was powered by 1050 volts from the dynamotor, which was first powered by 12 volts from the batteries.
OK. I've modified the table in the article to include this description. Rather than trying to work it into the quotation from Bob's original research paper, I've just let it stand alone at the end of the table as a summary of the situation.
Marty,
Unfortunately, that change to the table prompts two further comments:
1) Change the attribution for the first part from Bob Brandenburg to Mike Everette.
2) Delete the Jeffrey Neville entry. The transmitter was not
powered by 1050 volts, per se. The transmitter received 1050 volts (at pins 13 and 16) from the dynamotor when it was activated for transmitting. This voltage was applied to the plates of the three tubes comprising the 1st and 2nd RF amplifiers. It was dropped across series resistors R10.1 and R10.2 to 380 V and applied to the plates of the oscillator and audio amplifier tubes (one each). That's all that 1050 volts was used for.
The transmitter received 12 volts from the battery for the tube filaments (pins 3 and 4 for +12 V and pins 1 and 2 for -12 V, or ground)--regardless of whether the transmitter was in standby (in which case it drew ~ 6 A), or in transmit (for which the average draw was 10.6 A). The transmitter received 12 volts from the battery on pin 5 for relays S4, S5, and S6, and for the oscillator crystal heaters if they were employed. Again, for both standby and transmit.
Chuck