HIGH POWER MEDIUM WAVE LOADS

Using much of the same application technology of the standard 6700 Series, Altronic Research’s 77000 Series 50-ohm ultra high power loads were developed for today’s technically advanced medium wave installations. These loads demonstrate excellent and stable RF characteristics during their full range of operating power. Another unique feature for the Ultra Line is that no tuning of the load is required, making installation a faster process. These loads can be ordered as an indoor or outdoor model. The outdoor units have screened louvers at the air intake and air output and a roof to provide a rain shield for the RF input connector and electrical boxes. The larger models in this series are shown as the outdoor model only. Numerous Ultra High Power Loads are installed worldwide, including Croatia, Nova Scotia, Kuwait, Saudi Arabia, Quatar, and Vietnam. A typical VSWR plot of these loads is shown below.

Model 7750 Forced Air Cooled

Power Rating 
50kW continuous duty

Impedance
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors 
3 1/8″, 4 1/16″ or 6 1/8″ EIA Flanged

AC Power Required 
200-460 Volts, 50/60 Hz, 1 or 3 Phase

Nominal Dimensions (Including Conn.) 
76″ x 52″ x 42″ H
(1.9m x 1.3m x 1.1m)

Nominal Weight 
450 lbs. (204 kg)

Finish 
Beige Splatter

Model 7775 Forced Air Cooled

Power Rating 
75kW continuous duty

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors
3 1/8″, 4 1/16″ or 6 1/8″ EIA Flanged

AC Power Required 
200-460 Volts, 50/60 Hz, 1 or 3 Phase

Nominal Dimensions (Including Conn.) 
95 1/2″ x 52″ x 42″ H
(2.4m x 1.3m x 1.1m)

Nominal Weight 
500 lbs. (227 kg)

Finish 
Beige Splatter

Model 77100 Forced Air Cooled

Power Rating 
100kW continuous duty

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors 
3 1/8″, 4 1/16″ or 6 1/8″ EIA Flanged

AC Power Required 
Indoor 200-460 Volts, 50/60 Hz, 1 or 3 Phase
3 Horsepower
Outdoor 200-460 Volts, 50/60 Hz, 3 Phase
4 Horsepower

Nominal Dimensions (Including Conn.) 
Indoor 73″ x 86 1/2″ x 43″
(1.8m x 2.2m x 1.0m)
Outdoor 87 1/4″ x 81″ x 43 1/4″ 
(2.2m x 2.1m x 1.1m)

Nominal Weight
Indoor 1400 lbs. (636 kg)
Outdoor 1600 lbs. (727 kg)

Finish 
Beige Splatter

Model 77150 Forced Air Cooled

Power Rating 
150kW continuous duty

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range (1.05 or better available)

Input Connectors 
3 1/8″, 4 1/16″ or 6 1/8″ EIA Flanged

AC Power Required
Indoor 200-460 Volts, 50/60 Hz, 1 or 3 Phase
3 Horsepower
Outdoor 200-460 Volts, 50/60 Hz, 3 Phase 4 Horsepower

Nominal Dimensions (Including Conn.) Indoor 73″ x 86 1/2″ x 43″
(1.8m x 2.2m x 1.0m)
Outdoor 87 1/4″ x 81″ x 43 1/4″ 
(2.2m x 2.1m x 1.1m)

Nominal Weight
Indoor 1500 lbs. (681 kg)
Outdoor 1700 lbs. (772 kg)

Finish Beige Splatter

Model 77200 & 77300 Forced Air Cooled

Power Rating
Indoor/Outdoor 77200 200kW
Indoor/Outdoor 77300 300kW

Impedance
50 ohms nominal

Frequency Range
540 to 1750 KHz

VSWR
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors
3 1/8″, 4 1/16″ or 6 1/8″ EIA Flanged

AC Power Required
200-460 Volts, 50/60 Hz, 1 or 3 Phase 4 HP

Nominal Dimensions (Including Conn.)
Indoor 105″ x 70″ x 64 1/2″ (2.6m x 1.8m x 1.6m)
Outdoor 105″ x 72 1/2″ x 80 1/2″ (2.6m x 1.8m x 2.0m)

Nominal Weight
Indoor 1600 lbs. (727 kg)
Outdoor 2000 lbs. (908 kg)

Finish
Beige Splatter

Model 77450 & 77600 Forced Air Cooled

Power Rating
Indoor/Outdoor 77450
 450kW
Indoor/Outdoor 77600 600kW

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors 
4 1/16″, 6 1/8″ or 9 3/16″ EIA Flanged

AC Power Required 
Indoor 200-480 Volts, 50/60 Hz, 3 Phase 6 HP
Outdoor 200-460 Volts, 50/60 Hz, 3 Phase 8 HP

Nominal Dimensions (Including Conn.)
Indoor 90″ x 70″ x 106 1/2″ (2.3m x 1.8m x 2.7m)
Outdoor 106″ x 72″ x 106 1/2″ (2.7m x 1.8m x 2.7m)

Nominal Weight
Indoor 3500 lbs. (1540 kg)
Outdoor 4000 lbs. (1816 kg)

Finish 
Beige Splatter

Model 77750 Forced Air Cooled

Power Rating 
750kW continuous duty

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors 
6 1/8″, 9 3/16″ EIA Flanged

AC Power Required 
200-480 Volts, 50/60 Hz, 3 Phase, 6 Horsepower

Nominal Dimensions (Including Conn.) 
Consult Factory

Nominal Weight 
4500 lbs. (2043 kg)

Finish 
Beige Splatter

Model 771500 Forced Air Cooled

Power Rating 
1500kW continuous duty

Impedance 
50 ohms nominal

Frequency Range 
540 to 1750 KHz

VSWR 
< 1.1:1 Over Operating Range
(1.05 or better available)

Input Connectors 
9 3/16″ EIA Flanged

AC Power Required 
200-460 Volts, 50/60 Hz, 3 Phase, 18 Horsepower

Nominal Dimensions (Including Conn.) 
121″ x 99″ x 152″
(3.1m x 2.5m x 3.9m)

Nominal Weight 
6000 lbs. (2724 kg)

Finish 
Beige Splatter