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425 [2007/02/12 01:52]
n5na
425 [2018/10/30 02:33] (current)
n5na [Reviews]
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 ====== Titan Model 425 Linear Amplifier ====== ====== Titan Model 425 Linear Amplifier ======
 +{{425.jpg?​150|}}{{:​425rear.jpg?​150|}}{{:​425ps.jpg?​100|}}
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 +===== Reviews =====
 +  *[[http://​www.arrl.org/​members-only/​prodrev/​pdf/​pr8604.pdf|ARRL]] (Must be an ARRL member and logged in to view.)
 +  *[[http://​www.eham.net/​reviews/​detail/​669|eHam]]
 +  *CQ Magazine, 1986, February, Pg 34
 +
 +
 +===== Mods & Info =====
 +  *[[425versions|Titan 425 Duty Cycle and Version Description]]
 +  *[[425schem-k9yc|Titan 425 Partial Schematic]]
 +
 +===== Brochure =====
 +{{425brochure.jpg?​150|}}
 +
 ===== Specifications ===== ===== Specifications =====
   ***Band Coverage:** 1.8 - 2.0, 3.2 - 4.7, 6.5 - 8.5, 13.4 - 19.6, 17.6 - 23.0 MHz, With 10 meter modification,​ 17.6 - 26.5, 20.6 - 31 MHz.   ***Band Coverage:** 1.8 - 2.0, 3.2 - 4.7, 6.5 - 8.5, 13.4 - 19.6, 17.6 - 23.0 MHz, With 10 meter modification,​ 17.6 - 26.5, 20.6 - 31 MHz.
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   ***Drive Power:** 65 to 80 watts typical for 1500 watts output.   ***Drive Power:** 65 to 80 watts typical for 1500 watts output.
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   ***Efficiency:​** 50 - 65%, depending on frequency, drive level, and load.   ***Efficiency:​** 50 - 65%, depending on frequency, drive level, and load.
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   ***Distortion:​** -35 dB from 1 KW RF output level.   ***Distortion:​** -35 dB from 1 KW RF output level.
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   ***Harmonics:​** -50 dB typical.   ***Harmonics:​** -50 dB typical.
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   ***Input/​Output Impedances:​** 50 Ohms.   ***Input/​Output Impedances:​** 50 Ohms.
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   ***CW Break-in:** QSK with vacuum relay. ​ RF sensing circuit prevents keying or un-keying if 10 mW of RF present on the RF drive line.  Switching time less than 8 ms.   ***CW Break-in:** QSK with vacuum relay. ​ RF sensing circuit prevents keying or un-keying if 10 mW of RF present on the RF drive line.  Switching time less than 8 ms.
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   ***Tube Complement:​** Two Eimac 3CX800A7 ceramic, external anode triodes in a grounded grid circuit. ​ Plate dissipation,​ 1600 watts.   ***Tube Complement:​** Two Eimac 3CX800A7 ceramic, external anode triodes in a grounded grid circuit. ​ Plate dissipation,​ 1600 watts.
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   ***Plate Voltage:** HI = 2400 Vdc, LO = 1800 Vdc, no load.   ***Plate Voltage:** HI = 2400 Vdc, LO = 1800 Vdc, no load.
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   ***Cooling:​** Ducted forced air, vertical exhaust, using a two speed centrifugal blower.   ***Cooling:​** Ducted forced air, vertical exhaust, using a two speed centrifugal blower.
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   ***Metering:​** Full time plate current. ​ Switch selected plate voltage, grid current, forward power or reflected power. ​ Peak power is indicated on a 10 element LED bargraph display. ​ The first nine elements are amber - the tenth LED is red and indicates 1500 watts output.   ***Metering:​** Full time plate current. ​ Switch selected plate voltage, grid current, forward power or reflected power. ​ Peak power is indicated on a 10 element LED bargraph display. ​ The first nine elements are amber - the tenth LED is red and indicates 1500 watts output.
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   ***ALC:** Negative-going,​ adjustable threshold.   ***ALC:** Negative-going,​ adjustable threshold.
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   ***LED Status Indicators:​** Overdrive, Standby, Wait, Operate..   ***LED Status Indicators:​** Overdrive, Standby, Wait, Operate..
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   ***Primary Power:** 220 - 250 VAC @ 20 A, maximum. 117 Vac operation possible but not recommended.   ***Primary Power:** 220 - 250 VAC @ 20 A, maximum. 117 Vac operation possible but not recommended.
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   ***Protection:​** Primary line fuses, plate current fuse, ac line and high voltage interlocks.   ***Protection:​** Primary line fuses, plate current fuse, ac line and high voltage interlocks.
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   ***Front Panel Controls:** Power ON-OFF; Mode (Standby-Operate);​ plate voltage select (HI-LO); Plate TUNE; Loading; BAND Switch; METER Switch.   ***Front Panel Controls:** Power ON-OFF; Mode (Standby-Operate);​ plate voltage select (HI-LO); Plate TUNE; Loading; BAND Switch; METER Switch.
  
-=== Size and Weight ==+== Size and Weight ==
   ***Amplifier:​** HWD 5.25" x 15.25" x 15"   ***Amplifier:​** HWD 5.25" x 15.25" x 15"
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   ***Power Supply:** HWD 8.25" x 13.4" x 10.25"   ***Power Supply:** HWD 8.25" x 13.4" x 10.25"
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   ***Amplifier:​** 17 lbs   ***Amplifier:​** 17 lbs
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   ***Power Supply:** 45 lbs   ***Power Supply:** 45 lbs
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