McMartin BF-5K Instruction Manual Download | Manualshive

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Summary of Contents for BF-5K

Page 1: ...www SteamPoweredRadio Com I I I I I I Ir I I I_ I I 1 I I I I I MCMar in lIJJ f r1rdkdi 3 0 J mdi BF SK McMartin Industries Inc 4500 South 76th Street Omaha Nebraska 68127 1880 402 331 2000 Telex 484485 ...

Page 2: ...NSMITTER INSTRUCTION MANUAL I TECHNICAL SPECIF CATIONS II GENERAL DESCRIPTION Ill INSTALLATION IV OPERATION page 2 6 V DETAILED CIRCUIT DESCRIPTION 7 VI REMOTE CONTROL 10 Vtl MAINTENANCE 10 VIII PARTS LIST 11 WARRANTY 13 IX SCHEMATIC DIAGRAMS 14 X APPENDIX A 8 910Manual following Schematic Diagrams ...

Page 3: ...urs clean and cool and you wi l l be rewarded by long reliable service Preventat ive main tenance i s far more des irea Jle han t at dor e only when absolutely necessar Fol low geed engi neering prac ice i n e 1er1thing you do in c nnecticn with the operation of this equipr ent CAUT10N If your t ar smitter is sup lied for use en 3 pr asa pr i ary power i t i s extl emely important tli JCU are rovi...

Page 4: ...beige w woodgrain trim STEREO OPERATION with B 110 Stereo Assembly AUDIO INPUT IMPEDANCE 12177 600 ohms balanced each channel AUDIO INPUT LEVEL AUOIO FREQUENCY RESPONSE TOTAL HARMONIC DISTORTION STEREO SEPARAT ON FM NOISE PILOT STABILITY SUBCARRIER SUPPRESSION CROSSTALK L R to L R L R to L R 10 j 2 dBm 0 75 dB 30 15000 Hz Std FCC 75 usec preemphasis each channel 0 5 or less 30 15000 Hz 35 dB or gr...

Page 5: ...ATlON 3 1 PLAHHING It is recommended tnat the manual be studied in its en tirety prior to final instattatio ot the 8F 5K A full understanding of the controls c2rcuI try and input and out put terminations Nill assist in the preplanning stage Figure 1 is an outline dlmensional drawing of the trans mitter Provide adequate clearances tor access to the transmitter through the rear Preplan the location ...

Page 6: ...Radio Com I AfCMartin I 30 76 Zl 79 200 61 I Li l H n _j 87 ll Fl 0NT VIOi CIME jSl0NS IN GIVOI IN CENTIM T IS FIG I I I I I I I I I I I I I I I I I I I FIGURE 1 DIMENSIONAL OUTLINE 0 D 7 LJ 0 0 0 1 i I I i L __J 0 0 3 ...

Page 7: ... 4 REMOTE PLATE ON REMOTE PLATE OFF I ___0 3_0_2_0____ ITB 11 REMOTE PA CURRENT REMOTE PLATE VOLTAGE i REMOTE LOWER POWER TB 131___ 0_ 1 _0 2__ 0_ 3 _0_ 4__ 0_ 5 __ 0_6 __ 0_ 7 __ 0 _ 8 I FIG 2 REMOTE CONTROL TERMINAL BLOCKS FIGURE 2 REMOTE CONTROL TERMINAL BLOCKS ...

Page 8: ...ounter in the follow ing tune up procedure At this time you should calculate the exact transmitter output power you wi l l require to satisfy the effective rad iated power ERP speci lied in the station construc tion permit or license This will be equivalent to the ERP divided by your antenna power gain plus losses incurred in the transmission line feeding the transm i tter output to the antenna te...

Page 9: ...I the PA CATHODE CURRENT is approximately 350 mi Iii amperes higher than the PA PLATE CURRENT READING 10 Place REFLECTOMETER meter switch in FWD for ward power position Ad just PA TUNE and PA LOAD controls for maximum reading on the REFLECTO METER wh i le at all times maintaining PA PLATE CURRENT at min imum as the PA LOADING is in creased Switch REFLECTOMETER switch to REFL reflected power positi...

Page 10: ...n the IPA cathode ground return serves as the IPA overl ad relay Screen voltage for the paraIlet connected 4CX2508 tubes is obtained from the rotor ot the front panel POWER AD 12n1 JUST potentiometer A 7 which Is motor driven The raise tower control relays K 11 and K 13 are operated from the front panel RAISE LOWER control This control provides extremely smooth control of the transmitter power out...

Page 11: ... lGHT 0 OW R I I TO 115VAC OR 220VAC 0 I Fil R LAY I AIR r q i l Tt1 LOCX 4 IR INOICATOR 2 1 5 Sl C 0 F IL MA M UP I I I I I I I lt MOT I R SET_L R SETJ ____ J __________ K11 TO FlLAMt NT TRANSFORMt l t I P1 ATt I Ol J I I I I KS 1 I I I uno J t JGHT 1 AT ON i JGHT PLAT CONTAC TOR 1 11f C J o I I KIO OVERLOAO PROTl CTION ASSY AGURE 4 SlMP JFlED CONT ROL ClRCUIT DIAGRAM 241 AC l 0 ...

Page 12: ...c These primary winding taps permit 18 selections of transformer secondary voltages by use of the appropriate primary taps The secondary center tapped winding feeds a full wave bridge silicon rectifier stack consisting of D 9 through D 12 The rectified PA high voltage is filtered by a dual section LC filter L 17 L 18 C 47 and C 48 R 24 is the bleeaer load for the PA plate supply Plate voltage mete...

Page 13: ...tneut interruption ot lllament olower cir itty lntenvirtng ot nonnally pen centact closures in tne remote ccntrol ystem to TE 11 1 2 for Pt ATS OFF and TS 11 1 3 fOt Pl ATS ON eentrol Terminal lt1 is ecmmon or ground will perlorm these tunct1ons remotely whenever a m0mentary closure Is Initiated by tne 1 1 ffl0ta control system SO Wal OUTPUT AA15 t 0We I RJNC1 10NS A normally o en a ntact cla sure...

Page 14: ...inger marks by cleaning periodically with a mi Id detergent Meter faces and the front plexiglass panels should be gently wiped clean using standard pIexigIass cleaner or a mild detergent Use a clean soft cloth I I Vlll PARTS LIST A large number of the components are of standard values and tolerances generally a ai lab le through local electronics parts suppliers Those ot unusual values or toleranc...

Page 15: ...m 100 w Resistor tubular 50 Kohm 225 Resistor tubular CO Kohm 225 W Resistor megohm 4 W i Resistor tubular ldj 10 ohm 100 Resistor tubular ad j 5 chm 175 W R esistor tub lar adj 10 chm 50 w Resistor iubular dj 0 chm 225 i Ti nstcrrr er Hi 1olra e a suc y Trar s tormer p i i 5 l ac 7 51 A Transformer FA i J ac 5 Transtor ier scree l t i as su 1y Transformer ccr trcl voi ra g st _ q y U l 2 C Diode ...

Page 16: ... or equipment may be returned only with McMartin s prior authorization and must be identified by a return authorization number previously issued by McMartin s Customer Service Department All merchandise so returned must be sent transportation prepaid at Buyer s risk Full details of the failure or malfunction should be included so as to expedite repair or replacement Repair parts or repaired or rep...

Page 17: ... I I I I I I IX SCHEMATlC DIAGRAMS OVERLOAD PF OTECT ON P N55O2O9 1 VSWR DETECTOR P N 550204 1 MASTER SCHEMATlC P NOOO27O Fl LAMENT T RANSFORMER P N92OO37 RECT FlEF TRANSFORMEF1 P N918972 single phase P N918973 30 phase folded blueprint page 15 16 17 13 ...

Page 18: ... T f I 1 1 DJ IN 400 Rll U DI IN4004 NU 16K DI IN4001 Nil Uk DIO IH4001 Nil liK oz if OOI I l06 I HC TIMER I I I oz UHOO I L NJ I l o 4 lK I ii z l 1 l J l V ZtH EQ 001 o t 1 UH004 JO SEC TIU ft Kl6 TUl 6 IW CJ 11 01 Cl 01 Ctl 1 o CIO 111 4 _J k K UH t6 I I ltl l Of MAIUtlAtS I SCI ILM A IIC 04f f Ut C H l H l Of NO l t i NOHMALL Y OffN RELAY CONIA CJS 1 111 NOltS HOIIMA I LY CLOSfP HELAY CONJACT ...

Page 19: ... SteamPoweredRadio Com I MCMartin I I I I I I Cl 1250 _ 63V I C2 LC3 RI I 1 oo 47K I Kl I cl NC1 03 5 10 IN4006 4 I 12 IC I 3 N01 LM 322 2 I Cz 1 R2 1K N02 I I I I I I VSWR DETECTOR PIN 550204 1 I 12 TT 15 ...

Page 20: ... B e NE NE TIJI I REltlOrE I PA PLATE VOLrAGE c Hf rz _ 2411 I _ 7 J I l 7 wA 7J A J FR 1l if ti 1 O o IIZW o o 7 0 Os o 2 P i 1 CA THOOE 5 1t il JCURR NT i i N _ t J t VO i f I I REIMJTE _ C HD T R tlOTE Pl ATE Kl ac E 11 11 1 LOM R POWeR _ IIAJS POWER t CIIIPAM Fl TUI H oe I 1ui1 _ FWD l 0 I I 1REF lo 7 7 RE1 l S TOl TER I BF SM Single Phase MASTER SCHEMATIC 000270 July 24 1981 ...

Page 21: ...www SteamPoweredRadio Com I I I I I I I I I I 10 5 I COMMON I 10 I 6 CT I 208 2 220 3 7 5V I 240 4 7 I I I I I I I I I l FILAMENT TR 4NSFORMER I P N 920037 4 ...

Page 22: ...www SteamPoweredRadio Com I I I I I I I I I I I I I I I I I I I MCMartin 10 4KV 10 10 5KV 10 208 220 240 12 77 I I R I R3 RECTIFIER TRANSFORMER P N 918972 17 ...

Page 23: ...www SteamPoweredRadio Com I MCMartin I I s I I 5 I 208 I I I I 208 I 240 I 5 I 5 I I 208 I 240 I I RECTIFIER TRANSFORMER I P IN 918973 ...

Page 24: ... transformer used to power control ladder relays and lamps Shown above is the normal connection arrangement for 28 volts output To increase or decrease output voltage subtract or add primary turns accordingly EA lK EA 2 SK EA 5K2 RA lOK BF lM BF 3 SM BF SM BF lOM BF 25M Low Voltage Supply Transformer A 3106 Decenber 31 1979 ...

Page 25: ...arrangement a separate 230 to 115 volt step down transformer has been added making the transmitter independent of any neutral or ground con nection from the power line As a result the three phase input line can now be connected to input terminals 8 9 and 10 of terminal board TB 10 in any sequence A new schematic which reflects this change is included 000270 Revision B The primary tap of T6 the 230...

Page 26: ... 30 1980 _2_ot_2_ BF 3 SM BF SM BF l0M BF 25M Input Circuit Modifications Can t L24 A49 2 2K A50 2 2K C68 001 I VI R51 2 2K 13 3K R52 2 2K C69 r 001 I V2 R53 2 2K 2 V2 ANO 54 NOT USED IN BF IOM ANO BF 25M NOTE5 I RESISTORS IN OHMS 2 WATT AL APPt IOVAL DATE 7 zr V I CHANGE NO ...

Page 27: ... AND DAMAGE above or for consequential or resulting loss or damage whether or not due to causes covered by this warranty IRETURN PROCEDURE FOR WARRANTY CLAIMS Where no obvious or externally visible fault exists be sure the tube actually is inoperable before returning it This should be done by operating the associated equipment first with a tube known to be good to verify the functioning of the equ...

Page 28: ...nt DC Per Tube________ MA MA Total Control Grid Bias Voltage DC______ Volts Volts Control Grid Current DC Per Tube______ MA MA Suppressor Grid Voltage D DC D AC_____ Volts Volts Filament Voltage O DC O AC_ ______ Volts_ _ Volts What are extremes of filament voltage due to variations of supply lines and operating conditions _____to____ volts How is screen voltage obtained Is a screen bleeder used _...

Page 29: ...www SteamPoweredRadio Com MCMarli n m JJ llJ llf J J OmJmmril r I I I I I I I I I I I I I I I I I I MC Martin Industries Inc 4500 South 76th Street Omaha Nebraska 68127 1880 402 331 2000 Telex 484485 I ...

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