High power—Overview and specifications
NGT Transceiver System Technical Service Manual 209
Specifications
The figures listed for specifications will normally be exceeded by production equipment.
Where relevant, typical values are given in brackets [ ]. All measurements are made with
a modified NGT source (with Option F) and 50 Ω load unless otherwise specified.
Power amplifier specifications (3061/3062)
NOTE
These specifications indicate differences beyond the regular transmitter
specifications for the NGT. For the standard transmitter specifications of
the NGT see page 39, Transmitter specifications.
Table 1: Power amplifier specifications (3061/3062)
Item Specification
Power output 3061: 500 W PEP ±1.0 dB, 300 W average
3062: 1 kW PEP ±1.0 dB, 600 W average
CW or single tone: approximately 60% of PEP with average PEP
control (average control disabled on handset PTT)
Duty cycle 100%: normal speech over full temperature range, –10 to 60°C
(14 to 140°F)
100%: all modes up to a maximum ambient temperature of 45°C (113°F)
Supply 100–240 V AC ±10%, 50/60 Hz single phase
3061: 800 VA (two-tone), 900 VA maximum
3062: 1.6 kVA (two-tone), 1.8 kVA maximum
Protection Safe under all load conditions
Latching bypass under load in excess of 3:1 VSWR
Latching bypass with heatsink temperature > 70°C (158°F)
Latching bypass with internal fault conditions
Fans operate at 45°C (113°F) (low speed) and 55°C (131°F) (high speed)
Spurious and harmonic
emissions
Better than 60 [65] dB below PEP
Intermodulation
(two-tone test)
26 [27] dB below each tone, 32 [33] dB below PEP
ALC A 10 dB increase in signal input above compression threshold produces
< 0.5 dB increase in power output
Maximum ALC range > 30 dB
ALC attack time approximately 2 ms
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