Harris GATES M-6576 Technical Manual Download Page 68

Page: 68 / 70

Summary of Contents for GATES M-6576

Page 1: ...stnnuccmi m2ke 13m HARRIS INTERTYPE CORPORATION M 6576 FM 7 5H FM TRANSMITTER GATES A DIVISION OF HARRIS INTERTYPE...

Page 2: ...prior written consent of Seller EXCEPT AS SET FORTH HEREIN AND EXCEPT AS TO TITLE THERE ARE NO WARRANTIES OR ANY AFFIRMATIONS OF FACT OR PROMISES BY SELLER WITH REFERENCE TO THE EQUIPMENT OR TO MERCH...

Page 3: ...INSTRUCTIONS FOR INSTALLING OPERATION OF FM 7 5H 7 5U FM TRANSMITTER IB 888 0963 031 Gates Radio Company Quincy Illinois...

Page 4: ...7 25 to 191 50 191 75 C10 193 25 to 197 50 197 75 11 199 25 to 203 50 203 75 12 205 25 to 209 50 209 75 13 211 25 to 215 50 215 75 The frequency range for commercial FM broadcasting is 92 1 Mc to 107...

Page 5: ...association to say I told you so Remember it is difficult to radiate harmonics if the equipment is built to suppress the harmonics and it is 4 In many instances interference may be caused by overloadi...

Page 6: ...DESCRIPTION 4 1 Power Amplifier 4 2 Intermediate Power Amplifier IPA 4 3 Exciter 4 4 Power Supply 4 5 Control Circuits 4 6 Metering 7 7 8 10 11 12 12 12 13 14 SECTION 5 ADDITIONAL INFORMATION 5 1 Rem...

Page 7: ...ct the primary power at the building wall switch and dis charge all capacitors with the grounding stick provided 1 2 Purpose of Book This instruction book has been prepared to assist in the installati...

Page 8: ...actor Altitude Ambient Temperature Range Maximum VSWR Overall Cabinet Size Weight Front Door Swing 1 m n p r s Remote Local Switch Plate Tuning Control Output Loading Control IPA Plate Tuning Control...

Page 9: ...ation will be billed to the customer plus transportation expenses the cost of which should form a portion of your claim to the transportation company A complete visual inspection should be made of the...

Page 10: ...ion is provided in the FM 7 5H by access from the front or the rear of the transmitter cabinet Mount the power transformer T4 through the back door of the transmitter It would be wise to remove the ce...

Page 11: ...bove and below the deck surface Installing the 4CX5000A is simple Handling of this tube is covered in Section 2 4 The anode connector assembly secures with a clamp to the tube and with a bolt to the p...

Page 12: ...e with the information in the M 6533 stereo generator instructions The power leads for the transmitter should come from a low reactance power source of either 208 230 or 240 volts 60 Hz 3 phase with a...

Page 13: ...l heating and cooling contractor for a detailed analysis of the problem After the transmitter has operated in full output a number of hours a temperature rise inside the transmitter must not ex ceed a...

Page 14: ...ment voltage position Set the filament volt age for 7 5 volts Next place the multimeter switch on the meter panel to the driver cathode current position This is the UP position If the exciter is deliv...

Page 15: ...ing may at some fre quencies and power levels be different for maximum output and for minimum driver plate current A compromise should be made on the plate tuning of the driver for a driver cathode cu...

Page 16: ...e remote control Raise Lower func tion for power output 3 4 Maintenance o e Maintenance of the FM 7 5H should consist of the following 1 Keeping the transmitter clean 2 Changing tubes when emission fa...

Page 17: ...p and water or denatured alcohol This transmitter is a precision electrical device and as such should be kept clean at all times and free of dust and foreign material Dust and moisture condensation wi...

Page 18: ...grid circuit is capacity tuned The plate circuit is common with the PA grid as previously ex plained Screen bypassing is effected with the built in bypass of the 4CX250B air system socket The IPA cath...

Page 19: ...Recycle Relay energizes when either the PA overload or IPA overload relay is energized a number of times The number of times is determined by control R25 The two overload relay contacts are in series...

Page 20: ...s meter works in conjunction with the directional coupler mounted in the output transmission line SECTION 5 ADDITIONAL INFORMATION 5 1 Remote Control Remote control facilities are built into the FM 7...

Page 21: ...000 398 0017 000 992 1600 001 942 3928 004 612 0230 000 612 0237 000 612 0233 000 570 0120 000 570 0119 000 574 0099 000 574 0054 000 Cap 470 pf 1 KV ceramic disc Cap 001 uf 1 KV ceramic disc Var Cap...

Page 22: ...R VSWR R1 R2 R3 R4 540 0594 000 Res 200 ohm 2 W 5 R5 R17 540 0058 000 Res 2400 ohm 1 2 W 5 R6 R9 R13 R25 550 0067 000 Control 10K ohm R7 540 0070 000 Res 7500 ohm 1 2 W 5 R8 914 9092 Udl VSWR Control...

Page 23: ...ltimeter Selector Switch 2 pole 3 pos Sil 602 0056 000 Bias Low High Voltage Lever Switch i pole S12 S13 604 0052 000 Low High Voltage Limit Switch Tl 472 0409 000 P A Fil Transformer T2 472 0090 000...

Page 24: ...6425 FM EXCITER AS USED WITH M 6533 STEREO GENERATOR AND M 6507 SCA GENERATOR S o HARRIS INTERTYPE TION o CA rEe GATES RADIO COMPANY A Subsidiary of Harris Intortype Corporation IB 888 0924 001 QUINC...

Page 25: ...DRAWINGS 842 4885 001 838 2064 001 838 1955 001 838 2157 001 827 1630 001 842 4693 001 838 2575 001 838 2026 001 842 4887 001 814 9571 001 Functional Block Diagram Interconnecting Diagram Schematic Po...

Page 26: ...r to remain ON continuously for improvement in stability The exciter may be turned ON or OFF with the power switch located on the power supply for any test purposes Parts List Change 994 6533 001 Ster...

Page 27: ...te to J4 Connect P3 RF Input color coded black to J3 B Audio Module 992 1830 001 Insert module into cabinet and connect pli to J11 C Automatic Frequency Control Module 992 1716 001 Insert module into...

Page 28: ...GATES RADIO COMPANY QUINCY ILLINOIS A DIVISION OF HARRIS INTERTYPE CORPORATION PHOTO FRONT VIEW TE 1EXCITER 800 0811 001...

Page 29: ...100 modul ation ref 400 Hz 35 dB min 30 to 15 000 Hz Sub Carrier Suppression with or without modulation present 42 db min below 90 modulation Crosstalk main channel to sub channel or sub channel to m...

Page 30: ...smitter for an older type of exciter Refer to the packing check list for modules removed for shipping If the unit is already in atransmitter interconnections to the exciter have already been made If y...

Page 31: ...ope to junction of L8 and R30 Connect signal generator to junc tion of C17 C18 2 Do not turn power on to SCA Determine if unit being tested is to be tuned to 41 or 67 kHz 3 If desired frequency is 41...

Page 32: ...ontrol equipment may be connected to ap propriate terminals on back of the exciter enclosure and the stereo mono functions performed remotely MAINTENANCE General maintenance should consist of merely k...

Page 33: ...t plug from audio unit and any SCA generators that are used This should isolate problem as to whether it is in the modulated oscillator or not EXCESSIVE CROSSTALK MAIN STEREO CHANNEL TO SCA CHANNEL Th...

Page 34: ...about 1kHz for every 50 to 75 kHz drift of the modulated oscillator In other words assume that both the free running and locked frequency are exactly the same and no deviation from correct center fre...

Page 35: ...The composite stereo signal including the pilot is completely re moved from the modulation input of the modulated os cillator If the function switch is in the stereo position left and right audio inpu...

Page 36: ...put bias from the base of Q6 disappears causing Q6 to conduct This changes the bias at the base of Q7 causing it to con duct heavily When this happens the impedance from the junction of C17 and C18 to...

Page 37: ...into the base circuit of amplifier Q13 Cancellation causes any remaining crosstalk at the base of Q13 to be removed This can be set precisely by crosstalk null control R33 Adjustment of the stereo gen...

Page 38: ...XQ6 XQ7 XF1 XF2 XF3 10 WAT Cl C2 C3 C5 C6 C9 C10 C18 C21 Gates Part No Description 540 0574 000 Res 30 ohm 2W 5 548 0189 000 Res 2200 ohm 3W 1 552 0775 000 Pot 1000 ohm 1 2 W 548 0190 000 Res 17 5K oh...

Page 39: ...Symbol No R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R18 R20 R21 R22 R23 Ti XQ1 XQ2 XQ3 Gates Part No Description 540 0880 000 Res 47 ohm 1 4W 5 540 0881 000 Res 51 ohm 1 4 W 5 540 0948 000 Res 33K ohm...

Page 40: ...hm 1 2 W 5 Res 1800 ohm 1 2 W 5 Res 3300 ohm 1 2 W 5 Res 2700 ohm 1 2 W 5 Res 1300 ohm 1 2W 5 Res 470 ohm 1 2W 5 Res 330 ohm 1 2 W 5 Res 910 ohm 1 2W 5 Res 4300 ohm 1 2W 5 Res 1500 ohm 1 2 W 5 Res 470...

Page 41: ...0 uF 15V Cap 50 uF 25V Cap 35 a 25V Cap 1uF 200V Cap 470 pF 300V 5 Cap 1000 uF 25V Cap 1000 pF 1 KV 10 Symbol No CR1 CR2 CR3 CR4 Gates Part No Description 915 0064 001 Diode Quad Assy J7 610 0419 000...

Page 42: ...Thermistor 1000 ohm Switch Subminiature Toggle SPDT Transformer 19kHz Transformer 38kHz Transformer Transformer Test Point Jack White Test Point Jack Black Symbol No XQI XQ2 thru XQ16 XY1 Y1 Gates Par...

Page 43: ...IER MODULATOR 73 4 CRI 2 3 4 ISOLATION 011 ISOLATION 08 ISOLATION 041 012 ISOLATION 02 191 112 TUNED AMPLIFIER 03 3611912 TUNED DOUBLER 04 05 761 HZ TUNED KIPLIF I ER 09 ISOLATION 010 AMPLIFIER 013 IS...

Page 44: ...a 19Q 01 P 0 0 O P 8 4 0 T 49 49 CO tQ 0Q 0 4 it 0_000 4 2 1 00Q 0 C71 I 4 3 I 0000 I C 1 pl 3 L 4 000 0 I S 1 000 c 4 C7g LTD Pi P4 3 P 0 i I I wc 1 0 re ii cII i ta4c Sr PS KI4Z SCA PI 2 P2 3 p 0 0...

Page 45: ...R5 IN2767 Ir W4 96VDC 24 9VDC CRI RI3 Ui20 5_4_j 1 N303 16 1 OX L _ 25 3VDC 25 3VDC 712 01 I 01 06 RCA 40319 35 4VDC 07 2N697 4mV P P 12 2VDC 11 7VOC RI4 1600 31 715 uf 96 5407 24007 R8 1000 3w RIA t1...

Page 46: ...0 3 NEG ON PWR SUP CHASSIS GND CI8 RIS T 47 L5 R2I elnir LL 3 3 NOTE UNLESS OTHERWISE SPECIFIED I RESISTANCE VALUES ARE IN OHMS 2 CAPACITANCE VALUES ARE IN PICOFARADS 3 INDUCTANCE VALUES ARE IN MICRO...

Page 47: ...if R9 000 27 Cil C 2 T O 44 T22 Chs L3 ve 13 Keel S 50 23 Ve fr75 2 5 vems GIS 5_50 41 47 5 P7 3134E L4 3 5 5veAys 2 vem 7 3 34 E G 4 V 2A15 venes ell L5 C 8 TO00 1 C2 i cx L 7 47o J 2 24 vocre D C e...

Page 48: ...2 4 35 145 I 2 4ES 77 4AIES AFS 20 1e5 2 5E 729 0 CVO L 7 245 08 22708 2 3t Dc C33 iffuf 2 4 42 I Ic lgd4 Cdc eso 235 4 3 VPP 30 NS Eise l11 4 4 5 3 7 3 D5 8 iE44 CO 000 4 7147C Raj 33 W027 2 23 7 6 r...

Page 49: ...AU0i0 OUT 4g KHZ AUDIO OUT RZO 300 15 1 C5 025 1 XK I BOTTOM VIEW C C CDCDC C 40000 OCIGO G DE EIERGIZED ROTORS ENERGUED II 1 PRINTED BO PC ONO Min CHASSIS ONE JUNIPER IF NEI DED j 5 Sk HELo GWID SI R...

Page 50: ...26 CSe C30 64 154 251 I LflfL 4VP r R43 2K _ 51 OC e 000 5VOC 14 R24 R25 10K R211 2 C R2G 33K Ci4 1 R27 10K isoo 33K 1 e 5 2 V 1 rwo C17 0 I o 4 1 0C Q3 21 1G9 7 it roc 2K CiG 15 4 NOTE t 5 sMop r 200...

Page 51: ...i I slo 1 cao 1 ii2v0C 95 11 46 2 1 6 EG 0 Wv S C GE su a C Aeelig Mee More 3 413 Dc R82 2 45 won 49 CL6 CE2 1 L toot ug 3 1 Norf 7 413 0C ce3 4 07 f 2 l8VOC 4 4 781 ig C f 451 OC 268 roc 0 n Ce4 10 N...

Page 52: ...C 0 GATES RADIO COMPANY QUINCY ILLINOIS A DIVISION OF HARRIS INTERTYPE CORPORATION SCHEMATIC All ISOLATION PAD FM EXCITER 814 9571 001...

Page 53: ...V 1 R 1 7 P A 4CX 5000 A GRID SCREEN PLATE 85 TO 115V Z000 V 3001 TO 1000V GRID BiAS P PLY OL usLE S NOTEC FqAC ONS 1 64 DEC A4ALs 005 ANGLES t OLD DIMENS ONS t I 32 ALL INDICATES 125 muLNO INC rul 05...

Page 54: ...L R33 f PA SCREEN SI 1 k IPA SCREEN R26 s I REMOTE LOCAL 57 MULTIMETER M1 PA 1p PA Ep M2 M3 0 Z El t RF OUTPUT M4 m PLATE TUNING L2 1 OUTPUT LOADING C6 POWER AMPLIFIER p IPA PLATE TUNING C26 IPA r IPA...

Page 55: ...OTO IMO 008 o Figure 7 2 Floor of Transmitter Rear View 600 1L90 008 Figure 7 3 RF Output Balun...

Page 56: ...o o 4CX5000 TUBE DECK REFER FOR MEASUREMENTS o Figure 7 4 RF Cubicle...

Page 57: ...I eYne 7 1 o Mew L 8 _ NV1 Vt J Lno d P s neLz 2 es 9 o 9 5 9 9 e z PT S At 7 2 1 Indev 9 401 1 bZ 7 z er r _ 4 1e1A d wak ill Wog 7 s70 y L7 0 9 4Od 177 7 0 0 00 09f 77Apws e 771 4 Ste Me A d01 838 C...

Page 58: ...17 15 TUNlNG NC ES FROM TuNING BAR TO PA DECK 13 9 88 90 92 94 96 98 100 102 104 106 108 FREQUENCY MC PA COARSE TUNING PA 7 5 0 5 1 N FM TRANSMITTER FI G 7 6 814 r 001...

Page 59: ...40 30 11 3 4 5 6 POWER OUTPUT kW REFER TO THE TRANSMITTER FACTORY TEST DATA FOR THE EFFICIENCY FACTOR DETERMINED ON FINAL TEST 7 REVISED 10 1 71 8 7 7 3 _ E CATES RADIO CC nr PAM QUINCY ILLINOIS CRUM...

Page 60: ...31J 1 7dWS Vd VdI IPA GRID TUNING rr INPUT 50 OHMS V V V2 4CX250B IPA PLATE TUNING It VI 4C X5000A OUTPUT 50 OHMS PA V OUTPUT LOADING o PA PLATE TUNING IPA 8 PA SIMPLIFIED SCI 4 EMATIC DIAGRAM rM 7 S...

Page 61: ...rting sleeve Appearance of Notch Filter at Second Harmonic C5 FIGIJP E 7 11 C6 At Operating Frequency At frequencies below resonance the Stub appears as an inductance At frequencies above resonance th...

Page 62: ...Ie RO 03 CYT ZSIV of 100OPP OK CM 10OOPP s 401 71 1 000 P A 7 ROO 01 A0 105 RE9 1190 50 EL7 7 1 1 OS 00 100 411 O L ADJUST F21 10 77 LTIAIET cA4 ALPO ROI 4 1 RIO TIS3 3 u j 0 FOSIT 0M FUNCTION NNNN MA...

Page 63: ...higher the efficiency the better 3 COMPUTING POWER OUTPUT Power output is computed either into the radiating antenna or a known dummy antenna In either case the resistance measurements are known Your...

Page 64: ...stage to the final audio stage Other outage conditions not affecting the transmitter are listed below for your checking Under certain conditions especially at higher altitudes the guy insulators will...

Page 65: ...of grounding in important places of the system and in some instances actually use of too many grounds The common ground is usually preferred to grounding both ends of audio cables and other similar sh...

Page 66: ...and stockholders When trouble comes he is under pressure He will do his best to correct the problem as fast as he can It is well to remember that electronic equipment has many circuits and many avenu...

Page 67: ...Div Pi Plate Current 2 o PL Plntr Voltage 1 1 3 se c Volts RF Output 40 1 Intts 10 thLL No 982 3 2 TEST Co 4 st td 7 a 1 DE pill 2 y1 2 7 z guoio 0 4 7 Voltage measured at TE 3 1 M V Off III U_SCELI...

Page 68: ...75 us pre emphasis Curve Or c l DB DB o o D DB DB DB DB DB DB DB DB FM noise mith respect to 100 modulation at 400 Hz is dB Input lovel necessary to modulate 100 400 Hz is 1 1 1Noise dB M With respect...

Page 69: ...unibial imeaks aa idamaan a St microsecond pre emphasis curve for monaural operation 75 microsecond curve Drawing No 813 7298 001 50 microsecond curve Drawing No 813 5988 001 FREQUENCY DISTORTION RESP...

Page 70: ...B Muting l vel referenced to 100 modulation at 400 Hz is 1 7 dB Distortion and Response at 100 modulation Frequency response measured with respect to the Gates standard 50 microsecond pre emphasis cur...

Search results

Summary of Contents for GATES M-6576

Reviews:

Related manuals for GATES M-6576

Brands by name

Popular brands

Harris GATES M-6576, Technical Manual

Search results

Summary of Contents for GATES M-6576

Reviews:

Related manuals for GATES M-6576

Brands by name

Popular brands