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444 [2007/02/12 04:38] n5na |
444 [2007/04/19 03:00] n5na |
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| - | ====== Hercules Model 444 Linear Amplifier ====== | + | ====== Hercules Model 444 Solid-State Linear Amplifier ====== |
| {{444.jpg?150|}} | {{444.jpg?150|}} | ||
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| + | ===== Description ===== | ||
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| + | Consists of two sections, amplifier and power supply. The amplifier is styled to match the Ten-Tec Omni transceiver and contains all operating controls, meters and indicators. Two 500 watt push-pull transistor amplifier modules operating at 45 volts DC provide typically 600 watts of rf output from the hybrid output combiner. The power supply section is housed in a utility type enclosure and provides approximately 45 VDC @ 24 amperes. | ||
| ===== Specifications ===== | ===== Specifications ===== | ||
| ***Band Coverage:** 1.8 - 2.0, 3.5 - 4.0, 7.0 - 7.3, 14.0 - 14.35, 21.0 - 21.45 MHz and provision for four user modified auxiliary bands. | ***Band Coverage:** 1.8 - 2.0, 3.5 - 4.0, 7.0 - 7.3, 14.0 - 14.35, 21.0 - 21.45 MHz and provision for four user modified auxiliary bands. | ||
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| ***Maximum Power Input:** CW: 1000 watts; SSB: 1200 watts PEP. | ***Maximum Power Input:** CW: 1000 watts; SSB: 1200 watts PEP. | ||
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| ***Driving Power Required:** 50 watts typical. | ***Driving Power Required:** 50 watts typical. | ||
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| ***Duty Cycle:** SSB: Continous voice modulation; CW/RTTY: 50% continuous (key down not to exceed 5 minutes). Continuous carrier operation possible at reduced output. | ***Duty Cycle:** SSB: Continous voice modulation; CW/RTTY: 50% continuous (key down not to exceed 5 minutes). Continuous carrier operation possible at reduced output. | ||
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| ***Third Order Distortion:** -35 dB from peak output at 1 kW input or 600 watts output, whichever come first. | ***Third Order Distortion:** -35 dB from peak output at 1 kW input or 600 watts output, whichever come first. | ||
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| ***Output Impedance:** 50 Ohms unbalanced, maximum reflected power 75 watts. (SWR = 2.3 @ 500 watts output). | ***Output Impedance:** 50 Ohms unbalanced, maximum reflected power 75 watts. (SWR = 2.3 @ 500 watts output). | ||
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| ***Input Impedance:** 50 Ohms unbalanced. Broad-band input requires no tuning. (SWR less than 2:1). | ***Input Impedance:** 50 Ohms unbalanced. Broad-band input requires no tuning. (SWR less than 2:1). | ||
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| ***Meter Functions:** 0 - 30 A collector current continuously metered. Switch selected - 0 - 60 V collector voltage, 0 - 1000 watts forward power, 0 - 100 watts reverse power. | ***Meter Functions:** 0 - 30 A collector current continuously metered. Switch selected - 0 - 60 V collector voltage, 0 - 1000 watts forward power, 0 - 100 watts reverse power. | ||
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| ***Front Panel Controls:** Power - ON-OFF; Mode - Standby-Operate); Meter - Volts, Forward Power, Reverse Power; BAND - Remote, 1.8, 3.5, 7.0, Aux-1, 14.0, Aux-2, 21.0, Aux-3, Aux-4. | ***Front Panel Controls:** Power - ON-OFF; Mode - Standby-Operate); Meter - Volts, Forward Power, Reverse Power; BAND - Remote, 1.8, 3.5, 7.0, Aux-1, 14.0, Aux-2, 21.0, Aux-3, Aux-4. | ||
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| ***Amplifier:** HWD 5.8" x 16" x 15.5" | ***Amplifier:** HWD 5.8" x 16" x 15.5" | ||
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| ***Power Supply:** HWD 7.4" x 15.7" x 13.5" | ***Power Supply:** HWD 7.4" x 15.7" x 13.5" | ||
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| ***Amplifier:** 22 lbs | ***Amplifier:** 22 lbs | ||
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| ***Power Supply:** 50 lbs | ***Power Supply:** 50 lbs | ||
| ===== Reviews ===== | ===== Reviews ===== | ||
| *[[http://www.eham.net/reviews/detail/4180|eHam]] | *[[http://www.eham.net/reviews/detail/4180|eHam]] | ||
