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425 [2007/02/12 01:35] n5na |
425 [2018/10/30 02:33] (current) n5na [Reviews] |
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| ====== Titan Model 425 Linear Amplifier ====== | ====== Titan Model 425 Linear Amplifier ====== | ||
| - | ===== Specifications ===== | + | {{425.jpg?150|}}{{:425rear.jpg?150|}}{{:425ps.jpg?100|}} |
| - | ***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. | + | |
| - | ***Input Power:** 2000 watts, maximum. | ||
| - | ***Power Output:** 1300 watts SSB, 1000 watts CW, RTTY and SSTV 650 watts, 50% duty cycle. | + | ===== 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 | ||
| - | ***Drive Power:** 100 watts for full rated output. | ||
| - | ***Efficiency:** 50 - 65%, depending on frequency and load impedance. | + | ===== Mods & Info ===== |
| + | *[[425versions|Titan 425 Duty Cycle and Version Description]] | ||
| + | *[[425schem-k9yc|Titan 425 Partial Schematic]] | ||
| - | ***Input/Output Impedances:** 50 Ohms, unbalanced, SWR < 2:1. | + | ===== Brochure ===== |
| - | + | {{425brochure.jpg?150|}} | |
| - | ***Distortion:** -35 dB from 1 kw RF output level. | + | |
| + | ===== 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. | ||
| + | ***Drive Power:** 65 to 80 watts typical for 1500 watts output. | ||
| + | ***Efficiency:** 50 - 65%, depending on frequency, drive level, and load. | ||
| + | ***Distortion:** -35 dB from 1 KW RF output level. | ||
| ***Harmonics:** -50 dB typical. | ***Harmonics:** -50 dB typical. | ||
| + | ***Input/Output Impedances:** 50 Ohms. | ||
| + | ***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. | ||
| + | ***Tube Complement:** Two Eimac 3CX800A7 ceramic, external anode triodes in a grounded grid circuit. Plate dissipation, 1600 watts. | ||
| + | ***Plate Voltage:** HI = 2400 Vdc, LO = 1800 Vdc, no load. | ||
| + | ***Cooling:** Ducted forced air, vertical exhaust, using a two speed centrifugal blower. | ||
| + | ***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. | ||
| + | ***ALC:** Negative-going, adjustable threshold. | ||
| + | ***LED Status Indicators:** Overdrive, Standby, Wait, Operate.. | ||
| + | ***Primary Power:** 220 - 250 VAC @ 20 A, maximum. 117 Vac operation possible but not recommended. | ||
| + | ***Protection:** Primary line fuses, plate current fuse, ac line and high voltage interlocks. | ||
| + | ***Front Panel Controls:** Power ON-OFF; Mode (Standby-Operate); plate voltage select (HI-LO); Plate TUNE; Loading; BAND Switch; METER Switch. | ||
| - | ***CW Break-in:** QSK capable, Relay switching. | + | == Size and Weight == |
| - | + | ***Amplifier:** HWD 5.25" x 15.25" x 15" | |
| - | ***Tube Complement:** Two Eimac 3-500Z. | + | ***Power Supply:** HWD 8.25" x 13.4" x 10.25" |
| - | + | ***Amplifier:** 17 lbs | |
| - | ***Power Amplifier Circuit:** Class AB2, grounded grid. | + | ***Power Supply:** 45 lbs |
| - | + | ||
| - | ***Plate Voltage:** 3100 volts, no load. 2600 volts, full load. | + | |
| - | + | ||
| - | ***Cooling:** Forced air with full chassis air flow. | + | |
| - | + | ||
| - | ***Metering:** Dedicated plate current meter. Selectable multi-meter for plate voltage, grid current, forward or reflected power. Ten element LED bargraph display for peak power indication. | + | |
| - | + | ||
| - | ***Front Panel Status Indicators:** Standby, operator, transmit. | + | |
| - | + | ||
| - | ***Primary Power:** 220 - 250 VAC @ 15 A, 110 - 125 VAC @ 30 A, 50/60 Hz. For full power operation, 220 - 250 VAC strongly recommended. | + | |
| - | + | ||
| - | ***Circuit Protection:** Primary line fuses. Plate transformer primary interlock and high voltage shorting bar. | + | |
| - | + | ||
| - | ***Front Panel Controls:** Power on/off, standby/operate, control mode select (QSK - PTT/VOX), plate TUNE and LOAD, band switch, meter switch. | + | |
| - | + | ||
| - | ***Tune and Load Controls:** 6:1 vernier drives with calibrated dial skirts. | + | |
| - | + | ||
| - | ***Construction:** Aluminum chassis, front and rear panels, interior partitions and top and bottom covers. | + | |
| - | ***Size:** HWD 8.25" x 15.25" x 18.5" (20.3 x 38.7 x 46.9 cm) | ||
| - | ***Weight:** 47 lbs (21.3 kg) | ||
