TABLE OF CONTENTS TABLE OF CONTENTS LIST OF ILLUSTRATIONS SPECIFICATIONS WARNING NOTICES 10 METER OPERATION INTRODUCTION UNPACKING i-ii iii-iv v-vi vii vii viii ix 1 INSTALLATION 1.1 1.2 1.3 1-1 1-1 INTRODUCTION ELECTRICAL CONNECTIONS HIGH VOLTAGE TRANSFORMER INSTALLATION TRANSCEIVER INTERCONNECTIONS ANTENNA REQUIREMENTS GROUND CONNECTION HIGH POWER OPERATION ALC COOLING SYSTEM 1.4 1.5 1.6 1.7 1.8 1.9 1-1 1-2 1-2 1-2 1-2 1-3 1-3 2-1 2 OPERATING INSTRUC TIONS 2.1 2.
.3 2.4 2.5 REAR PANEL CONNECTIONS AND CONTROLS 2.3.1 TRANSCEIVER 2.3.2 ANTENNA 2.3.3 KEY IN 2.3.4 KEY OUT 2.3.5 PTT/VOX 2.3.6 ALC 2.3.7 ALC CONTROL 2.3.8 AC LINE 2.3.9 LINE FUSES INITIAL TURN-ON TUNE – UP PROCEDURE 2.5.1 CHECKS TO MAKE BEFORE TUNING UP 2.5.2 IMPORTANT POINTS TO REMEMBER 2.5.3 SUGGESTED TUNE – UP PROCEDURE 2-2 2-2 2-2 2-2 2-2 2-2 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-3 2-4 3 OPERATION AND SAF ETY 3.1 INTRODUCTION 3.1.1 TUBES 3.1.2 INTERLOCKS 3.1.3 FUSES 3-1 3-1 3-1 3-1 4 TROUBLESHOOTING 4.
LIST OF ILLUSTRATIONS FIG 1-1 1-2 2-1 2-2 2-3 2-4 2-5 2-6 4-1 DESCRIPTION PAGE T/R CONNECTIONS FOR TEN-TEC TRANSCEIVERS WITH TX OUT AND TX EN T/R CONNECTIONS FOR OTHER TRANSCEIVERS MODEL 417 TUNING CHART MODEL 417 TUNING LOG MODEL 417 FRONT PANEL MODEL 417 REAR PANEL MODEL 417 TOP VIEW MODEL 417 BOTTTOM VIEW TROUBLESHOOTING HINTS 1-4 1-4 2-5 2-6 2-7 2-7 2-8 2-9 4-1 5-1 5-2 ASSEMBLY A6 (81946) INPUT MATCHING BOARD CIRCUIT TRACE COMPONENT LAYOUT 5-2 5-2 5-3 5-4 ASSEMBLY A2 (81950) H.V.
ASSEMBLY A12 (81947) METER/SWITCH BOARD 5-13 5-14 COMPONENT LAYOUT CIRCUIT TRACE 5-10 5-11 ASSEMBLY A13 (81952) DISPLAY BOARD 5-15 5-16 COMPONET LAYOUT & TOP CIRCUIT BOTTOM CIRCUIT TRACE 5-10 5-12 ASSEMBLY A9 (81945) AC LINE / DELAY BOARD 5-17 5-18 COMPONENT LAYOUT CIRCUIT TRACE 5-12 5-13 ASSEMBLY A5 (81943) LOAD SHUNT BOARD 5-19 5-20 CIRCUIT TRACE COMPONENT LAYOUT 5-14 5-14 5-21 SCHEMATIC DIAGRAM, MODEL 417 5-15 iv
SPECIFICATIONS MODEL 417 BAND COVERAGE 160, 80, 40, 30, 20, 17, and 15 meters (12 and 10 meters for authorized users). POWER OUTPUT 1500 watts continuous in SSB, CW, AMTOR/PACTOR (50% duty cycle modes) on all bands. 1000 watts RTTY/SSTV (continuous duty cycle modes) for up to 10 minutes on 160, 80, 40, 20, 15, and 10 meter bands (750 watts on WARC bands 30, 17, and 12 meters). DRIVING POWER 60 watts typical for 1500 watts output.
METERING Full time plate current meter. Second meter selectable for screen grid current, plate voltage, forward power, and reflected power (x10). Peak forward power indicated on full-time LED bargraph display. FRONT PANEL CONTROLS TUNE and LOAD control knobs with 6:1 reduction drive. Rotary band switch and meter switch for screen grid current, plate voltage, forward or reverse power. Standby / Operate , QSK / PTT-VOX and Power on/off rocker switches.
WARNING!!!!!!! This amplifier contains lethal voltages when operating. DO NOT operate this amplifier with the covers removed.
INTRODUCTION The model 417 TITAN III is an advanced design linear amplifier using two 4CX800A high power tetrodes in a grid driven configuration. This amplifier uses a ducted forced air cooling system and operates easily at 1500 watts output with maximum efficiency of 65% . Two panel meters provide system monitoring. One meter is dedicated to full time plate current measurement. The other meter is switchable among plate voltage, screen grid current, forward power, or reflected power.
UNPACKING Carefully remove the amplifier from the packing carton and inspect it for signs of damage. Carefully remove the high voltage power transformer from its’ packing carton and inspect it for signs of damage. If the amplifier or transformer has been damaged, notify the delivering carrier immediately, stating the full extent of the damage. Save all damaged cartons and packing material. Liability for any shipping damage rests with the shipping carrier.
CHAPTER 1 INSTALLATION 1.1 INTRODUCTION: When setting up the station, provide adequate ventilation for the amplifier. Also, select a location that allows comfortable access to the front controls and adequate clearance for rear panel connections. 1.2 ELECTRICAL CONNECTIONS: The TITAN III amplifier draws up to 20 amps at 240 VAC. Care should be taken not to overload house wiring circuits usually fused or circuit breakered at 15 to 20 amps.
1.4 TRANSCEIVER INTERCONNECTIONS: When using the TITAN III with TEN-TEC transceivers with TX EN and TX OUT connectors, follow the diagram in Figure 1-1. The QSK-PTT/VOX switch on the TITAN III should be in the QSK position for all modes of operation. This hook-up arrangement will work with the OMNI series, PARAGON I and II, PEGASUS, JUPITER, and ORION. Some modern Yaesu transceivers are also equipped with a full break-in keying loop that can be utilized in a similar fashion.
structures. For the first few hours of operation, check the SWR frequently. Any increase in reflected power is an indication that something between the amplifier and the antenna elements, including the end insulators, is heating and must be corrected. 4. A solid earth ground is often essential. Every station will have a unique electrical ground due to location of equipment, distance between units, distance from house wiring ground rod, distance from RF ground rod, etc.
TITAN III TITAN III FIGURE 1-1 T/R CONNECTIONS FOR TEN-TEC TRANCEIVERS WITH TX OUT & TX EN TITAN III TRANSCEIVER TITAN III FIGURE 1-2 T/R CONNECTIONS FOR OTHER TRANCEIVERS WITHOUT TX OUT & TX EN 1-4
CHAPTER 2 OPERATING INSTRUCTIONS 2.1 INTRODUCTION: The following instructions will enable the operator to quickly place the TITAN III in operation. Included are descriptions of the front panel controls and rear panel connections, followed by a detailed tuneup procedure. Refer to Chapter 3 operation and safety tips. 2.2 FRONT PANEL CONTROLS: The front panel controls and their functions are described below. 2.2.1 BAND SWITCH: This switch selects the desired frequency of operation.
VAC the meter will read a little higher (3125 VDC). B. Screen current (Is) - When in this position, the meter is paralleled with a resistor in series with the screen supply. This monitors screen grid current. The upper limit for screen current is 75 mA. NEVER OPERATE THE TITAN III IN EXCESS OF 75 mA SCREEN GRID CURRENT. A warning zone indicator is used on the face of the meter to alert the operator. In addition to the analog meter, the screen overdrive LED indicates excessive screen current. C.
circuits. When used with late model TEN-TEC transceivers, this jack is not used. When used with other transceivers, this jack is connected to the normally open (grounding) contacts of the relay key out jack of the transceiver. 2.5 TUNE UP PROCEDURE: The following section describes important points to observe during tune up. A suggested procedure for safely tuning up the TITAN III is included. 2.3.
2.5.3 SUGGESTED TUNE UP PROCEDURE: Following is the recommended procedure for safe and proper tune up of the TITAN III. A. Set the band switch to the desired band. For 30 meter operation, use position 40B. For 17 meters, position 15. For 12 meters, position 10. B. Set the multimeter switch to the Ep position. C. After the wait LED goes out, place the STANDBY/OPERATE switch to OPERATE. The STANDBY/ OPERATE switch will light and high voltage is indicated on the multimeter (nominal 3000 VDC). D.
BAND FREQUENCY MHz LOAD TUNE 160A 1.820 6.1 4.1 160B 1.980 4 5.5 3.500 8.7 7.5 3.980 5.5 4.7 40A 7.040 3.6 1.6 40B 10.120 2 1 14.050 1.5 1.5 14.250 1.4 1.1 18.110 2.1 5.2 21.050 1.4 1.5 12 24.900 2.5 4.2 10 28.100 1.6 .
BAND FREQUENCY LOAD TUNE ANTENNA FIGURE 2-2 MODEL 417 TUNING LOG 2-6 NOTES
FIGURE 2-3 TITAN III FRONT VIEW FIGURE 2-4 TITAN III REAR VIEW 2-7
FIGURE 2-5 TITAN III TOP VIEW 2-8
FIGURE 2-6 TITAN III BOTTOM VIEW 2-9
CHAPTER 3 OPERATION AND SAFETY 3.1 INTRODUCTION: The following paragraphs provide additional information for operation of and safety from your TITAN III amplifier. 3.1.1 HIGH POWER TETRODES: The 4CX800As are very rugged and normally operate with a large margin of safety in the TITAN III. They will deliver outstanding service for many years if not damaged by abuse...especially excessive grid current or blockage of cooling air flow.
CHAPTER 4 MAINTENANCE AND TROUBLESHOOTING 4.1 INTRODUCTION: If you encounter a problem, the troubleshooting hints listed in TABLE 4-1 below will help isolate the nature of the problem. 4.2 MAINTENANCE: The amplifier compartment, particularly areas around high voltage components should be cleaned often (using a soft bristled brush and vacuum cleaner) to prevent visible accumulation of dust. DO NOT blow air directly into the fan input: this can over rev the motor and damage the bearings.
TABLE 4-1 TROUBLESHOOTING HINTS (Continued) 5. Relays A9K1, A9K2, and A9K3 close at turn on, but line fuses blow. 6. Amplifier won’t drive, zero grid and plate current, high input SWR . 7. Grid overdrive LED lights with no drive. 8. Screen overdrive LED lights with no drive. 9. Amplifier difficult to drive, little or no output, high plate current (may be accompanied by a “frying sound”). 10. Excessive plate current in receive mode. A] High voltage shorted at crowbar or elsewhere. B] Shorted tube.
CHAPTER 5 CIRCUIT DESCRIPTIONS AND ILLUSTRATIONS 5.1 INTRODUCTION The following sections contain detailed circuit board subassemblies used in the model 417. Also included are circuit trace drawings and detailed component layout diagrams. These drawings are followed by a schematic diagram for the complete amplifier. 5.2 INPUT MATCHING BOARD A6 (81946) This board contains the input filter, impedance matching networks, and ALC circuits.
FIGURE 5-1 INPUT MATCHING BOARD (ASSEMBLY A6) CIRCUIT TRACE AS VIEWED THROUGH BOARD FIGURE 5-2 INPUT MATCHING BOARD (ASSEMBLY A6) COMPONENT LAYOUT TOP VIEW 5-2
H.V. POWER SUPPLY BOARD A2 (81944) This board contains the high voltage rectifier bridge (D1 – D20), H.V. filters (C1 – C8 and C14), and H.V. meter circuits.
5.4 SCREEN SUPPLY AND GRID BIAS BOARD A10 (81950) This board contains the screen supply, grid bias supply, and protective circuits for the 4CX800As. The screen voltage is rectified by diodes D4 – D7 and filtered by C1 – C3 and C15. This DC voltage is then regulated by pass element Q8. Load resistors R25 – R27 provide a current drain to insure screen current remains in the positive direction. MOV Z1 protects the power supply in the event of tube arc and insures the screen voltage can’t surge above 450 VDC.
TOP SIDE COPPER BOTTOM SIDE COPPER FIGURE 5-6 SCREEN SUPPLY (ASSEMBLY A10) CIRCUIT LAYOUT VIEWED THROUGH BOARD FROM TOP 5-5
5.5 QSK BOARD A11 (81949) This board contains the low voltage supply, turn-on relay sequencing circuits, and T/R relay control. The low voltage is rectified by D1 – D4 and filtered by C6. U1 and Q2 provide regulation for all low voltage circuits except the negative 16 VDC supply. After a 3 minute warm-up period determined by RC time constant of R4 and C5,Q19 and Q11 will conduct, turning on the pass element Q7. This initiates amplifier power up.
FIGURE 5-8 QSK BOARD (ASSEMBLY A11) TOP AND BOTTOM CIRCUIT TRACES VIEWED THROUGH BOARD FROM TOP 5-7
5.6 SWR BOARD A4 (81951) This board contains the input relay K1, output relay A14, hotshot speed-up circuit Q3-C19, and the SWR bridge T1 for output power sampling.
5.7 PLATE BOARD A3 (81948) This board contains the parasitic suppressors and coupling capacitors to connect the 4CX800A plates to the amplifier tank circuit.
5.8 METER/SWITCH BOARD A12 (81947) and DISPLAY BOARD A13 (81952) This board contains the metering circuits for the front panel meters. A12S1 selects the parameter to be monitored. This selection is then sent to multimeter M1. The multimeter has three calibrated scales for measuring plate voltage, screen current and forward or reflected RF power. The KW scale should be divided by ten when measuring reflected power.
COMPONENT SIDE COPPER SOLDER SIDE COPPER FIGURE 5-14 METER/SWITCH BOARD (ASSEMBLY A12) CIRCUIT VIEWED THROUGH BOARD FROM FRONT PANEL 5-11
FIGURE 5-16 DISPLAY BOARD (ASSEMBLY A13) BOTTOM CIRCUIT VIEWED THROUGH BOARD FROM TOP 1 U1 GRN 5.9 U2 GRN U3 GRN U4 GRN U5 GRN U6 GRN U7 RED AC LINE DELAY BOARD A9 (81945) This board contains the step start relays and associated circuitry to control inrush current while the H.V. filter capacitors charge.
TOP COPPER BOTTOM COPPER FIGURE 5-18 AC LINE DELAY BOARD (ASSEMBLY A9) CIRCUIT TRACE TOP VIEW THROUGH BOARD 5-13
5.10 LOAD SHUNT BOARD A5 (81943) This board contains some of the extra load capacitance needed for the tank circuit on the 160M band. Capacitance is paralleled across the variable load capacitor on bandswitch positions 160A, and 160B, and 80.
FIGURE 5-21 SCHEMATIC DIAGRAM MODEL 417 5-15
CHAPTER 6 MASTER PARTS LIST MODEL 417 CHASSIS MOUNTED PARTS A1 ITEM DESCRIPTION TEN-TEC PART # T1 T2 BLOWER S1 S2 S3 S4 S5 S6 L1 L2 L3 L4 L5 L6 C1A C1B C2 C4 C5 C6 C8 C10 P3 V1 V2 V1/V2-S F1-F2 HV TRANSFORMER LV TRANSFORMER CENT. BLOWER SHORTING BAR INTERLOCK SW ON-OFF SW STBY-OPR SW QSK –PTT SW BAND SW P/O TANK COIL-1 P/O TANK COIL-1 TANK COIL-2 10M PI COIL 15/10M PLATE MATCH PLATE CHOKE TUNE CAPACITOR LOAD CAPACITOR 150pF 5KV N750 150pF 5KV N750 .01uF 1KV .01uF 1KV 400pF 7.
AC LINE BOARD A9 81945 ITEM DESCRIPTION TEN-TEC PART # C1 C2 C3 C4 K1 K2 K3 .01uF 1KV .01uF 1KV 1uF 50V .01uF 1KV RELAY SPST RELAY SPST RELAY SPST COVER, RELAY MPSA14 33K 100K 22K 10 25W 1.5 AMP MDL 23013 23013 23264 23013 32067 32067 32067 32072 25253 30155 30161 30154 30310 27018 Q1 R1 R2 R3 R4 F1 F2 INPUT MATCHING BOARD A6 81946 C1 C2 C3 C4 D1 FL1/A7 L1 L2 L3 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 6-2 15pF 1KV .01uF 100pF .01uF 1KV 1N4148 15M INPUT FILTER 1MH COIL-TOROID, .
METER-SWITCH BOARD A12 81947 ITEM DESCRIPTION TEN-TEC PART # C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 D1 D2 D3 D4 M1 M2 Q1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 .01uF .01uF .01uF .01uF .01uF .1uF .01uF 1uF 50V .01uF .01uF .1uF .1uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .1uF .01uF .
ITEM DESCRIPTION TEN-TEC PART # R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 SW1 U1A U1B U2 4.7K 2.2K 330 1.5K 100K 100K 100K 10K TRIMPOT 100K PC ADJ 100K PC ADJ 10K TRIMPOT 100K TRIMPOT METER SW P/O LM393 P/O LM393 LM3914 30146 30142 30132 30140 30161 30161 30161 30038 30620 30620 30038 30198 98449 FROM 32050 25260 25260 25101 PLATE BOARD A3 81948 C1 C2 C3 C4 L1 L2 R1-R5 R6-R10 .001uF 6KV .001uF 6KV .001uF 6KV .
ITEM DESCRIPTION TEN-TEC PART # C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C21 C22 C23 C24 C25 C26 C27 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 K1 K2 K3 K4 L1 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 10uF 10uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .01uF .56uF 1uF 50V .01uF .01uF .1uF 1N5401 1N5401 1N5401 1N5401 1N4148 1N4148 1N4148 1N4148 1N750 4.
ITEM DESCRIPTION TEN-TEC PART # Q12 Q13 Q14 Q15 Q17 Q18 Q19 Q20 Q21 Q22 Q23 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R34 R35 R37 MPSW01 2N4124 2N4124 2N4124 2N4124 2N4124 2N6027 UJT 2N5087 2N4124 2N5087 2N4124 1K 1K 10K 3.9M 1K 1K 1.5K 1K 1K 1K 1K 10K 10K 10K 22K 22K 22K 47 10K 1K 1.5K 10K 10K 2.2K 10K 100 1K 8.2K 2.
ITEM DESCRIPTION TEN-TEC PART # R38 R39 R40 R41 R42 R43 R45 R46 R47 R48 R49 R50 R51 R52 U1 10K 10K 10K 10K 10K TRIMPOT 10K 10K 2.2K 4.7K 10K 10K 10K 4.7K 10K ALC POT LM7812 30150 30150 30150 30150 30619 30150 30150 30142 30146 30150 30150 30150 30146 30267 25232 SCREEN SUPPLY BOARD A10 81950 C1 C2 C3 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 D1 D2 D4 D5 D6 100uF 160V 100uF 160V 100uF 160V .01uF 1KV 10uF 25V 33uF 16V 100uF 160V 10uF 50V .1uF .1uF .1uF 250V 100uF 160V .1uF 250V .
ITEM DESCRIPTION TEN-TEC PART # D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 L1 Q1 Q2 Q3 Q4 Q7 Q8 R1 R2 R3 R4 R5 R6 R7 R8 R13 R14 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 Z1 1A 1KV 1N5368 47V ZENER 1N5363 30V ZENER 1N5363 30V ZENER 1N5383 150V ZENER 1N5383 150V ZENER 1N4007 1N751 5.1V ZENER 1N4148 1N964 13V ZENER 100uH 100mA 2N4124 2N4124 MPSA92 MPSA92 2N6517 IRF830 15K 4.7K 100K 100K 10K 10K 100K 10K 12K 2W 3.3K .5W 4.7K 7W 680K .5W 680K .5W 680K .5W 680K .5W 22K 150 2W 100 OHM TRIMPOT 4.7K 7W 4.
SWR BOARD A4 81951 ITEM DESCRIPTION TEN-TEC PART # C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 K1 L1 L2 3-22pF .01uF .01uF 1uF 50V 1uF 50V 330pF 10pF 10pF 18pF 18pF .01uF .01uF .01uF .01uF .01uF .01uF .01uF 1000uF 35V .
ITEM DESCRIPTION TEN-TEC PART # L3 L4 L5 Q1 Q2 Q3 R1 R2 R3 R4 R6 R7 R8 R9 R10 R11 R13 R14 R15 R16 R17 T1 2.2uH 15uH 1mH RFC 2N6517 2N4124 MPSA14 47 OHM 2W 330K 680 330K 10K 330K 4.