I used the same test methods and equipment on this amp that I used on the YC156 amp. See that section for details. All power measurements were made with HP435 and HP437 power meters and calibrated directional couplers.

CW tests

  • Data taken with continuous carrier, A0
  • Efficiency (2) assumes drive power adds to output power

Frequency

Power in (W)
Power out (W)

Anode I(mA)

Grid I (mA)

Anode V

Gain (dB)

Efficiency % (1)

Efficiency % (2)

1830kHz

50

2000

800

49

3600

16.0

69.6

67.8

3520kHz

40

2020

770

50

3600

17.0

72.9

71.4

7030kHz

40

2020

795

51

3600

17.0

70.6

69.2

10110kHz

45

2025

807

54

3600

16.5

69.7

68.1

14030kHz

40

2010

820

50

3570

17.0

68.7

67.3

18080kHz

50

2010

852

50

3560

16.0

66.3

64.6

21030kHz

45

2030

868

45

3550

16.5

65.9

64.4

24900kHz

55

2010

900

57

3520

15.6

63.4

61.7

28100kHz

50

2030

896

50

3530

16.1

64.2

62.6

Linear tests

  • Data taken with two-tone RF input and 2kW PEP output

20m, best IMD, 48dB from PEP

Band

IMD dB PEP

17m, worst IMD, 38dB from PEP

160m

-46

80m

-46

40m

-46

20m

-48

17m

-38

15m

-42

12m

-44

10m

-46