Ampliphase
Ampliphase is the brand name of an amplitude modulation system achieved by summing phase modulated carriers.

This modulation and amplifier technology family was originally marketed by RCA for AM broadcast transmitters. The Ampliphase system was not developed by RCA, but by McClatchy Broadcasting in the mid-1930s. McClatchy Broadcasting acquired the technology via patent acquisition.

The Ampliphase design was originally proposed by H. Chireix in 1935 and termed "Outphasing" by him. He sold the patent to McClatchy Broadcasting that later sold the patent to RCA. RCA turned "Outphasing" transmitters into a mass-produced product. RCA's first transmitters using this modulation system were at the 50,000 watt level but later lower power transmitters such as 10 kw and 5 kw were made.

McClatchy Broadcasting was a former group owner of AM, FM and TV stations as well as a California publisher of newspapers. McClatchy Broadcasting should not be confused with the present-day McClatchey Broadcasting LLC, a different corporate entity.

Only one known transmitter of this type is still in use. KFBK in California maintains an RCA BTA-50H (the "last gasp" of the Ampliphase concept) as an auxiliary transmitter.
Q183755
amplitude modulation
Concept
Q750463
phase modulated
Concept
Q499193
carriers
Concept
Q218038
RCA
ORG
Q1377707
AM broadcast
MEDIA
Q14682569
KFBK
ORG
Q99
California
LOC
Q4748507
Ampliphase
ORG
Q4748507
Ampliphase
ORG
Q4748507
Ampliphase
ORG
Q4748507
Ampliphase
ORG
1935-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1935
DATE
-1930^^http://www.w3.org/2001/XMLSchema#decimal
-1930
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
+5^^http://www.w3.org/2001/XMLSchema#decimal
5
NUMBER
-50^^http://www.w3.org/2001/XMLSchema#decimal
-50
NUMBER
located in the administrative territorial entity