When RCA San Francisco Radio/KPH was a revenue stream for RCA GLOBCOM, the medium wave transmitter BL-10 (500 or 426 kHz) was 40 kW just one band.

KPH ran 10 kW on the HF bands each 
band had 3 or 4 transmitters. 

2, 4, 6, 8, 12 16 and 22 MHz. 
2 MHz was low power and no watch was on 2 MHz, but the other six bands were in heavy use. 

40 kW on 425/500 kHz
6 kW for 4 MHz 
8 KW for 6 MHz 
40 kW for 8 MHz 
40 kW for 12 MHz 
40 kW for 16 MHz 
40 kW for 22 MHz 

214 KW total OUTPUT power into KPH rhombic and long-wire antennas directed
toward the Pacific Ocean.

So maybe you should up your estimate and sit in the KPH seat and send out the NORTH PACIFIC OCEAN WX for us.




Medium Wave transmitter BL-10 at Bolinas, California with my friend, TR Reese, K6CG. 40 kW of modulated CW on the Medium Wave band.




TR's Wayback snapshot of his KPH archives. Save whatever you need. 

https://web.archive.org/web/20020107112750/http://www.radions.net/comrcial.htm

73
DR
N1EA 


On Mon, Jun 30, 2025, 8:18 PM Bob wo6w <bobleichner@gmail.com> wrote:
Indeed!

I recently qualified for a T license... Hope to operate the commercial side of KPH one of these days. One key, multiple transmitters at about 25KW total output. That would be an experience!

73
Bob WO6W
T-000195



On Mon, Jun 30, 2025 at 3:53 PM Radio KH6O <radio.kh6o@gmail.com> wrote:
Sort of reminds me of one key being able to key our 7 transmitters on 4/6/8/12/16/22/26 MHz at US Coast Guard Communications Station Honolulu (NMO).

73, Jeff KH6O


______________________________________________________________
CW mailing list
Home: http://mailman.qth.net/mailman/listinfo/cw
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:CW@mailman.qth.net
CW List ARCHIVES: http://mailman.qth.net/pipermail/cw/
Unsubcribe send email to
cw-unsubscribe@mailman.qth.net
Subscribe send email to cw-subscribe@mailman.qth.net
Support this email list: http://www.qsl.net/donate.html

=30=
______________________________________________________________
CW mailing list
Home: http://mailman.qth.net/mailman/listinfo/cw
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:CW@mailman.qth.net
CW List ARCHIVES: http://mailman.qth.net/pipermail/cw/
Unsubcribe send email to
cw-unsubscribe@mailman.qth.net
Subscribe send email to cw-subscribe@mailman.qth.net
Support this email list: http://www.qsl.net/donate.html

=30=