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Alpha Power ETO 91B, Руководство пользователя

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CONTENTS

CRITICAL PRECAUTION DURING INSTALLATION 

1

Section 1  INTRODUCTION 

1

General Description of the ETO 

91/3

 Amplifier 

1

Specifications, ETO 

91/3

 

1

Figure 1 Top View 

3

Section 2  PREPARING THE ETO 

91fi

 FOR OPERATION 

4

Transformer Installation 

4

Inspection of Tubes & Chimneys 

4

AC Primary Connections & Amplifier Grounding 

4

Operation from 90-130V mains 

5

Figures 2-4 Transformer Installation 

6

Section 3  AMPLIFIER/STATION INTERCONNECTIONS 

7

Coaxial Cable Types & Connectors 

7

T/R Control Cable 

7

ALC 

7

Figure 5 Back Panel 

8

Section 4  OPERATION 

9

4.1 Control Functions 

9

4.2 Tune-up 

9

1. Turning On the Amplifier 

10

2. Tuning Up for Operation at 1,500 Watts RF Output 

11

4.3 Reflected Power Protection 

12

4.4 ALC 

12

Section5  OPERATING AND MAINTENANCE NOTES 

13

Tubes 

13

Fuses 

13

Electronic Bias Control 

14

Plate Overcurrent Relay 

14

Preventive Maintenance 

14

Section 6  TROUBLESHOOTING HINTS 

15

Section 7  DESIGN AND CIRCUIT OVERVIEW 

17

SCHEMATICS

19

Содержание ETO 91B

Страница 1: ...M a n u a l HF LINEAR POWER AMPLIFIER Q ib u nA L F H A p o w E R IN C RF Power for Communications and Industry I l L i n B 14440 Mead Court Unit B Longmont Colorado 80504 p p 4 970 535 4173 FAX 970...

Страница 2: ...former Installation 6 Section 3 AMPLIFIER STATION INTERCONNECTIONS 7 Coaxial Cable Types Connectors 7 T R Control Cable 7 ALC 7 Figure 5 Back Panel 8 Section 4 OPERATION 9 4 1 Control Functions 9 4 2...

Страница 3: ...sof continuous key dcrwn carrier operation will exceed5 minutes the optional auxiliary coolingfan availablefrom ETO must beinstalled toavoidpossibledamage not covered by thewarranty As shipped units d...

Страница 4: ...C21 C24 C20 C26 under Power Supply Board PS J1 J2...

Страница 5: ...L4 BL1 HV Crowbar Vacuum Relay Power K2 Relays P1 XFMR T i S3 Interlock Figure 1 9ip Top View...

Страница 6: ...with strip wound Unisil H R core Protective Functions Primary and step start fuses primary AC interlock high voltage crowbar peak and average plate overcurrent trip outs arc protection trip reflected...

Страница 7: ...and fully installed so that the bottom of each chimney is firmly againstthe tube deck and completely covers the airflow openings in the deck Tube cooling air must exit only through the tube anode fin...

Страница 8: ...mumpeakpoweroutput toabout 600 1000 watts Maximum possible RF output power for any particular primary AC voltage and cur rent capacity may be estimated as Po max Vline x Dine 2 3 For example if the 91...

Страница 9: ...3A AC CONNECTION VIEW A A HIGH AND LOW VOLTAGE BOARD CONNECTIONS HV CONNECTION VIEW A A L V CONNECTIONS VIEW A A FIGURES 2 4 91 TRANSFORMER INSTALLATION...

Страница 10: ...FIGURE 5 91B REAR PANEL...

Страница 11: ...g and the other end with a plug suitable for the trans ceiver usually supplied with the transceiver The T R relay contact must close before application of RF drive 91 3 protection circuitry prevents h...

Страница 12: ...er OPR STBY OPeRate places the amplifier in line With the 9l off in STandBY or in warm up with the WATTLED lighted the amplifier is bypassed and the exciter is connected di rectly to the antenna Meter...

Страница 13: ...put consistait with good linearityoccurs when the green GRID LED lights on most voice peaks and the red LED flickers dimly only on the highest peaks Excessive grid current results from overdrive and o...

Страница 14: ...Up for Operation at 1 500 Watts RF Output 1 Preset BAND TUNE and LOAD controls to the nominal positions given in TABLE I below TABLE I Preliminary Tuneup Settings Frequency Band Tun Lo d 1 8 MHz 1 8 9...

Страница 15: ...tput 4 3 Reflected Power Protection While operating check the bargraph to ensure thatreflected power remains below about 165 watts peak 2 1 VSWR when amplifier outputis 1 500 watts Fluctuating reflect...

Страница 16: ...tage to chassis whenever the cover is lifted These interlocks are designed to protect against dangerous electric shock resulting from accidental contact with potentially lethal voltages inside the amp...

Страница 17: ...example a TUNE or LOAD variable capacitor and automatically switches the 91 3to standby within a few milliseconds This system has virtually eliminated RF arc damage in current ETO amplifiers The syste...

Страница 18: ...on but time delay will not complete WAIT LED does not turn off 1 Defector damage in timing circuitry on control board E Amplifier turns on time delay completes but amplifier will not transmit 1 Open...

Страница 19: ...r unshielded station patch cables 4 Poor station RF ground K Low frequency audio hum on transmitted signal 1 Defective microphone cord especially broken ground lead 2 Dynamic magnetic microphone locat...

Страница 20: ...MHz amateur bands Two section TUNE and LOAD capacitors C20 and C26 are switched to provide an electrical vernier for smooth easy and accurately resettable tuneup by the numbers on all bands Power Sup...

Страница 21: ...atlower right and keying switching functions at upper right Front Panel Displays Figure 8 The Display Board located on the rear side of the 9l front panel incorporates all indicator LEDs and their as...

Страница 22: ...91fi SCHEMATICS 19...

Страница 23: ...iaa ieavA C 2 0 0 2 5 0 V A C XXXXX C O N T R O L B U S S L_ L_ B i_ sL _ B 2 a_ a_ A 3_ 3 3 A A 4 A 4 A 4 B T 5_ B 5_ 5_ 5 L6_ 7 lJ7 7 _ 2_ 9 0 1 1 0 V...

Страница 24: ...D L O C K p L C 2 6 B 7 4 2 5 p F C 2 5 1 5 n F l k V B K l B f l p T f ci leg Ic3 P AD c JcsJ c6_1c 7_ ce C A P P C B A T g g n h b u u v Ir h R F F IL g P C X c x x O e CI 2 2 n F 5 0 0 V HV GND J 4...

Страница 25: ......

Страница 26: ...B R E A K D 23 T G U N LO C K 10 M E TE R S FIGURE 7 91 CONTROL BOARD...

Страница 27: ...P E R 10x2 C 1 2 c 3 4 c 5 6 c 7 0 c S 10 c 11 12 c 13 14 c 15 16 G 17 10 19 20 T O n z P EA K F V D G U T R EF L M E T E R GNP GNP i2v C F A U L T L E P 1 P L E P M U L T I M E T E R QPR LETD 5V F A...

Страница 28: ...FIGURE 8 91 S DISPLAY BOARD...

Страница 29: ...er FIGURE 9 91 POWER SUPPLY BOARD...

Страница 30: ...R13 J1 FIGURE 10 91 3 HV FILTER SCREEN SUPPLY...

Страница 31: ...FIGURE 11 91 INPUT BOARD...

Страница 32: ...FIGURE 12 91 OUTPUT RF WATTMETER FIGURE 13 91 MULTIMETER SWITCH...

Страница 33: ...l number plus details of equipment hookup acces sory equipment used operating conditions and abnormalities observed API will furnish a new part in exchange for any covered defective part or if it is d...

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