Broadcast Electronics FM-250C IPA Instruction Manual

250 watt fm amplifier

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Broadcast Electronics

4100 North 24

Street, Quincy, Illinois 62305 USA • Phone (217) 224-9600 • Fax (217) 224-9607 • www.bdcast.com • bdcast@bdcast.com

FM-250C IPA

250 WATT

FM Amplifier

Instruction Manual

597-1004-001

Rev B

January 18, 2012

Table of Contents

Troubleshooting

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Summary of Contents for Broadcast Electronics FM-250C IPA

Page 1 Broadcast Electronics 4100 North 24 Street, Quincy, Illinois 62305 USA • Phone (217) 224-9600 • Fax (217) 224-9607 • www.bdcast.com • bdcast@bdcast.com FM-250C IPA 250 WATT FM Amplifier Instruction Manual 597-1004-001 Rev B January 18, 2012...
Page 2 The information in this publication is subject to improvement and change without notice. Although every effort is made to ensure the accuracy of the information in this manual, Broadcast Electronics accepts no responsibility for any errors or omissions. Broadcast Electronics reserves the right to modify and improve the design and specifications of the equipment in this manual without notice.
Page 3 The warranty shall be voided if the product or subassembly is equipped with a tamper seal and that tamper seal is broken. BE shall not be liable for any expense of any nature whatsoever incurred by the original user without prior written consent of BE. ©2012 Broadcast Electronics...
Page 4 NO OTHER WARRANTIES, OR ANY AFFIRMATIONS OF FACT OR PROMISES BY BE, WITH REFERENCE TO THE EQUIPMENT, OR TO MERCHANTABILITY, FITNESS FOR A PARTICULAR APPLICATION, SIGNAL COVERAGE, INFRINGEMENT, OR OTHERWISE, WHICH EXTEND BEYOND THE DESCRIPTION OF THE EQUIPMENT ON THE FACE HEREOF. ©2012 Broadcast Electronics...
Page 5 RF PRODUCT TECHNICAL ASSISTANCE, REPAIR SERVICE, PARTS - Technical assistance is available from Broadcast Electronics by letter, prepaid telephone or E-mail. Equipment requiring repair or overhaul should be sent by common carrier, prepaid, insured, and well protected.
Page 6 All returned merchandise must be sent freight prepaid and properly insured by the customer. MODIFICATIONS - Broadcast Electronics, reserves the right to modify the design and specifications of the equipment in this manual without notice. Any modifications shall not adversely affect performance of the equipment so modified.
Page 7 Additional information follows. D. RF BURNS Circuit boards with RF power transistors contain high RF potentials. Do not operate an RF power module with the cover removed. ©2012 Broadcast Electronics...
Page 8 The power components in the IPA unit are cooled by forced-air and natural convection. When handling any components of the IPA unit after it has been in operation, caution must always be taken to ensure that the component is cool enough to handle without injury. ©2012 Broadcast Electronics...
Page 9: Table Of Contents
6.5 REMOVAL AND INSTALLATION ....................... 34 IPA UNIT METERING CIRCUIT BOARD .................... 35 7.1 DESCRIPTION..........................35 7.2 INTERNAL VOLTMETER CHARACTERISTICS..................35 7.3 THEORY OF OPERATION ......................... 35 7.4 MAINTENANCE ..........................38 7.5 REMOVAL AND INSTALLATION ....................... 40 ©2012 Broadcast Electronics...
Page 10 8.7 RF AMPLIFIER REMOVAL AND INSTALLATION ................. 57 8.8 POWER SUPPLY REMOVAL PROCEDURE..................58 BE Part Numbers .......................... 60 9.1 FM-250C, Solid State IPA ......................60 10 RF Technical Services Contact Information .................. 82 11 Drawings…..........................82 ©2012 Broadcast Electronics...
Page 11: Overview
The following list of publications provides data for equipment and options associated with the FM-250C IPA unit. EQUIPMENT DESCRIPTION. The FM-250C IPA unit is available in several configurations. Refer to the following list for various IPA unit models. MODEL PART NO.
Page 12: Equipment Specifications
1.4.2 STATUS DISPLAYS. The FM-250C IPA unit is designed with front-panel LEDs to indicate the status of three main IPA unit operating potentials, two preset limits. 1.4.3 CONTROL CIRCUIT.
Page 13 ENVIRONMENTAL AMBIENT OPERATING +32˚F to +122˚F (0˚C to +50˚C) TEMPERATURE HUMIDITY 95% Maximum, Non-Condensing. ALTITUDE 50 Hz 0 to 7500 Feet (2286 m) Above Sea Level. 60 Hz 0 to 10,000 Feet (3048 m) Above Sea Level. ©2012 Broadcast Electronics...
Page 14: Installation
5.0 amperes for the 194 to 266 volt range. PLACEMENT. The FM-250C IPA unit may be installed in any convenient location in a 19 inch (48.3 cm) rack within reach of signal and power cables. The unit requires a 7 inch (17.78 cm) vertical space in a 19 inch rack.
Page 16: Wiring
WARNING WIRING. RF OUTPUT. The FM-250C IPA unit is equipped with a Type N RF output connector. Refer to Figure 2-1 and connect a coaxial cable (located in the accessory kit) between the RF OUTPUT connector on the IPA unit rear-panel and a 50 Ohm RF load capable of dissipating the output of the IPA unit.
Page 18: Ipa Unit Checkout
1 Watt). Depress the multi-meter PAI switch. A. The multi-meter AMPS and PAI indicators will illuminate. B. The multi-meter will indicate approximately 0 amperes (assuming an RF output power of less than 1 Watt). ©2012 Broadcast Electronics...
Page 19 B. Using an insulated adjustment tool, adjust the IPA unit output power to the desired level. WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING Disconnect ac primary power from the IPA unit. Disconnect the RF load and connect the IPA unit output to the antenna or PA input. ©2012 Broadcast Electronics...
Page 20: Operation
OPERATION This section identifies all controls and indicators associated with the FM-250C IPA unit and provides standard operating procedures. CONTROLS AND INDICATORS. Refer to Figure 3-1 for the location of all controls and indicators associated with normal operation of the FM- 250C IPA unit.
Page 22 Amps Multi-meter Unit Illuminates when the multi-meter indicates units of Indicator current. Volts Multi-meter Unit Illuminates when the multi-meter indicates units of Indicator voltage. Watts Multi-meter Unit Illuminates when the multi-meter indicates units of Indicator power. ©2012 Broadcast Electronics...
Page 23 Table 3-2. POWER/VSWR CONVERSION Reflected Power in Watts = POWER RATIO Forward Power in Watts VSWR 0.000 1.0:1 0.002 1.1:1 0.008 1.2:1 0.017 1.3:1 0.028 1.4:1 0.040 1.5:1 0.053 1.6:1 0.074 1.75:1 0.111 2.0:1 0.183 2.5:1 0.250 3.0:1 0.360 4.0:1 ©2012 Broadcast Electronics...
Page 24: Theory Of Operation
This section presents overall theory of operation for the FM-250C IPA unit. For the purpose of explaining the FM-250C IPA unit circuitry, the IPA unit is divided into functional subassemblies. A detailed description of each subassembly is presented in Part II of this manual. A block diagram of the FM-250C IPA unit is presented in Figure 4-1.
Page 25 RF power to maintain safe operation of the RF devices. The broadband characteristic of the amplifier eliminates the necessity for adjustments at any frequency within the FM band, and enhances amplifier stability under varying load conditions. ©2012 Broadcast Electronics...
Page 28: Maintenance
Second level maintenance consists of procedures required to restore the FM-250C/E to operation after a fault has occurred. The maintenance philosophy of the FM-250C IPA unit consists of problem isolation to a specific assembly. Refer to the applicable section of this manual for detail troubleshooting information to isolate a problem to specific components.
Page 29: Troubleshooting
3.3 Ampere 4.5 Ampere 4.8 Ampere 125 Watts 4.7 Ampere 5.7 Ampere 5.9 Ampere 187 Watts 6.0 Ampere 6.6 Ampere 6.8 Ampere 250 Watts 7.4 Ampere 7.5 Ampere 7.5 Ampere 25 to 250 Watts Less than 6 Watts ©2012 Broadcast Electronics...
Page 30: Ipa Unit Preparation For Shipment
A. Ensure the top-cover is secured to the IPA unit. B. Pack the IPA unit in a carton, allowing 2 inches (5.08 cm) minimum of packing material all around the IPA unit. C. Provide adequate insurance coverage. ©2012 Broadcast Electronics...
Page 32 MANUFACTURER. USE CARE IN REPLACING TRANSISTORS OF THIS TYPE. COMPONENT REPLACEMENT. The circuit boards used in the FM-250C IPA unit are double-sided boards with plated-through holes. Because of the plated-through holes, solder fills the holes by capillary action. These conditions require that defective components be removed carefully to avoid damage to the board.
Page 33 Do not attempt to remove an integrated circuit from a socket with your fingers. Use an integrated circuit puller to lightly pry the component from the socket. ©2012 Broadcast Electronics...
Page 34: Power Control Circuit
VSWR protection circuit. THEORY OF OPERATION This section presents the theory of operation for the FM-250C IPA power control circuit board. A simplified schematic diagram of the power control circuit board is presented in Figure 6-1.
Page 36 Manual Power Control Operation. Automatic/manual power control operation is established by normal/test jumper J7. When J7 is in the test position, the FM-250C IPA output power will not automatically adjust to changing load conditions. The output power must be increased/decreased manually using the power output adjust control R67.
Page 37: Maintenance
E. Refer to Figure 6-3 and place jumper P7 in position 2-3. Connect the digital multi-meter between TP1 and ground. G. Apply primary power and operate the IPA unit. WARNING DONOT TOUCH ANY COMPONENT WITHIN THE IPA UNIT WITH POWER APPLIED. WARNING ©2012 Broadcast Electronics...
Page 38 Check for a 250 watt indication on the IPA unit multi-meter. If the IPA unit multi-meter does not indicate 250 watts, refer to Figure 6-3 and adjust forward power calibrate control R4 for a 250 watt indication on the IPA unit multi-meter. M. Disconnect the IPA unit primary power. ©2012 Broadcast Electronics...
Page 39 P. Refer to Figure 6-3 and adjust power output control R67 for the forward power value recorded at the beginning of the procedure. WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING Q. Disconnect the IPA unit primary power. R. Remove the test equipment and replace the IPA unit top-panel. ©2012 Broadcast Electronics...
Page 41 RF OUTPUT receptacle as shown. Configure the wattmeter for reflected power measurements. Refer to Figure 6-3 and operate power output control R67 fully counterclockwise. Connect the digital multi-meter between TP2 and ground. G. Apply primary power and operate the IPA unit. ©2012 Broadcast Electronics...
Page 42 U. Refer to Figure 6-3 and adjust power output control R67 for the forward power value record at the beginning of the procedure. WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING V. Disconnect the IPA unit primary power. W. Remove the test equipment and replace the IPA unit top-panel. ©2012 Broadcast Electronics...
Page 43: Troubleshooting The Power Control Board Circuitry
1. Check U5A. NO VSWR FOLDBACK OPERATION 1. Check U7B. NO P.A. CURRENT FOLDBACK OPERATION 1. Check U1C and U5B. NO OVER TEMPERATURE FOLDBACK OPERATION WARNING DISCONNECT PRIMARY POWER FROM THE IPA UNIT BEFORE REMOVING ANY COMPONENTS. WARNING ©2012 Broadcast Electronics...
Page 44: Removal And Installation
After the problem is isolated and power is totally de-energized, refer to the schematic diagrams and the theory of operation to facilitate in problem resolution. The defective circuitry may be repaired locally or the circuit board may be returned to Broadcast Electronics for repair or replacement. REMOVAL AND INSTALLATION This section provides removal and installation procedures for the power control circuit board.
Page 45: Ipa Unit Metering Circuit Board
U4A is routed through input switch U6A to A/D converter/display driver U7. U7 converts the analog voltage to digital information by activating the appropriate display segment control lines to DS12. LCD meter display DS12 will indicate a value as numerical characters. ©2012 Broadcast Electronics...
Page 46 +20 volt potential into a +15 volt source. Voltage regulator U17 converts the +15V regulated supply to +7.5 volts. The +7.5 volt supply is used as a reference for the LCD meter display and the LED bar graph display. ©2012 Broadcast Electronics...
Page 48: Maintenance
E. With an insulated adjustment tool, adjust R56 until the front-panel LCD display indicates 1000. WARNING DISCONNECT THE PRIMARY POWER TO THE IPA UNIT BEFORE PROCEEDING. WARNING Disconnect the power to the IPA unit, remove the test equipment, replace the test probe in the clip provided, and replace the top-cover. ©2012 Broadcast Electronics...
Page 49 After the problem is isolated and power is totally de-energized, refer to the schematic diagrams and the theory of operation to facilitate in problem resolution. The defective circuitry may be repaired locally or the circuit board may be returned to Broadcast Electronics for repair or replacement. ©2012 Broadcast Electronics...
Page 50: Removal And Installation
D. Remove the four front-panel mounting screws on the underside of the chassis and lower the front-panel. E. Remove the five screws securing the shield to the circuit board assembly. F. Remove the five stand-offs and one screw securing the circuit board assembly to the front-panel. ©2012 Broadcast Electronics...
Page 51 To install the metering circuit board assembly after repairs have been completed, proceed as follows: WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING A. Disconnect the primary power from the IPA unit. B. Follow the REMOVAL PROCEDURE in reverse order. ©2012 Broadcast Electronics...
Page 53 In addition, the RF amplifier assembly contains forward and reflected power directional couplers and an input mute circuit. The directional coupler outputs and operating potentials are routed from the circuit board through the chassis with feed-through capacitors to prevent RF interference. ©2012 Broadcast Electronics...
Page 54 Q4 to an unbalanced signal, and 3) provides a 50 Ohm output. The 50 Ohm output is routed to a low-pass filter and a directional coupler circuit on the low-pass filter/directional coupler circuit board. ©2012 Broadcast Electronics...
Page 56: Power Supply Circuit Board Description
D24/D25 will output a dc potential to the negative leg of a filter circuit consisting of capacitors C33 through C36 to generate a filtered +52 volt supply. The supply is applied to the switching power supply circuit. ©2012 Broadcast Electronics...
Page 57 When the PA voltage control signal decreases, the duty cycle of the pulse will decrease. The outputs of U6 are summed and applied to high-side switching power supply driver U7. U7 will output a variable pulse width signal to switching transistor Q7. ©2012 Broadcast Electronics...
Page 59 T1 is rectified by diode D3 and applied to a low-pass LC filter consisting of capacitors C6/C7 and inductor L2. The filter is used to remove ripple in the dc voltage. The output from the filter provides the 20 volt supply for all the circuitry in the IPA unit. ©2012 Broadcast Electronics...
Page 60: Maintenance
The RFL NULL control on the RF amplifier output circuit board adjusts the directivity of the reflected power directional coupler. Potentiometer R208 is adjusted as follows. Procedure. To adjust reflected power null control R208, proceed as follows: WARNING DISCONNECT THE PRIMARY POWER TO THE IPA UNIT BEFORE PROCEEDING. WARNING ©2012 Broadcast Electronics...
Page 61 DISCONNECT THE PRIMARY POWER TO THE IPA UNIT B E F O R E PROCEEDING. WARNING G. Disconnect the IPA unit primary power. H. Remove all test equipment and replace the access hole plug and IPA unit top-cover. ©2012 Broadcast Electronics...
Page 63: Troubleshooting
1) exchange a defective module for a reconditioned FM-250C IPA power amplifier module or 2) obtain an FM-250C IPA power amplifier module on loan during the repair of the defective module. Terms of the program are available from the Broadcast Electronics Technical Services Department.
Page 64 After the problem is isolated and power is totally de-energized, refer to the schematic diagrams and the theory of operation to facilitate in problem resolution. The defective circuitry may be repaired locally or the circuit board may be returned to Broadcast Electronics for repair or replacement. Table 8-2. POWER SUPPLY CIRCUIT BOARD TROUBLESHOOTING...
Page 65 1. Check D30, D31, D32, and U12. NO OVER VOLTAGE SHUTDOWN 1. Check U8. NO OVER CURRENT SHUTDOWN ©2012 Broadcast Electronics...
Page 67: Rf Amplifier Removal And Installation
To install the RF amplifier assembly after repairs have been completed, proceed as follows: WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING A. Disconnect the primary power from the IPA unit. B. Follow the REMOVAL PROCEDURE in reverse order. ©2012 Broadcast Electronics...
Page 68: Power Supply Removal Procedure
To install the power supply circuit board after repairs have been completed, proceed as follows: WARNING DISCONNECT IPA UNIT PRIMARY POWER BEFORE PROCEEDING. WARNING A. Disconnect the primary power to the IPA unit. B. Follow the REMOVAL PROCEDURE in reverse order. ©2012 Broadcast Electronics...
Page 70: Be Part Numbers
BE Part Numbers This section provides parts lists for the FM-250C IPA unit. The parts lists provide descriptions and part numbers of electrical components, assemblies, and selected mechanical parts required for maintenance. Each parts list entry in this section is indexed by reference designators appearing on the applicable schematic diagrams.
Page 71 421-4008 4-40 KEP NUT 421-6001 6-32 S.S. HEX THIN NUT 421-6008 6-32 KEP NUT 422-6106 SCREW,SEMS 6-32 X 3/8 PAN PH. ST." 422-6107 SCREW,SEMS 6-32 X 7/16 PAN PH.ST." 423-1001 1/4 FLAT .500 X .255 X .050 ©2012 Broadcast Electronics...
Page 72 1.25 469-0366-2 STRIP,RFI SHIELD 4.25 ..2 469-0366 FINGER STOCK (NOTE!!!!!) 4.25 471-0584-100 COVER,TOP,FM250C/E 471-0795 SHIELD,FRONT PANEL PCB,FX-50 ..2 471-0795-009 SHLD,FRT PNL PCB,FX-50,UNSCRND 471-0954-600 PANEL,STATUS,FM-250C IPA 471-2500-601 PANEL, REAR, 250W IPA, NEW VERSION ..2 471-2500-009 PANEL,REAR,(UNSCREENED)FM-250C 471-2501-100 CHASSIS,FM-250C/E ©2012 Broadcast Electronics...
Page 73 C32, C33, C51, C53, ..2 023-1084 CAP,LYTIC,100MFD,35V,STDUP,RAD C46, C47, C48, C49 ..2 030-3353 CAP,POLY FILM,.033UF,200V,10% ..2 040-5013 CAP,MICA,50PF,500V,5% ..2 042-3922 CAP,MICA,390PF,100V,5% C7, C16, C23, C25 ..2 100-1013 RES,1 OHM,1/4W,5% R113, R114 ..2 100-1041 RES,1K OHM,1/4W,1% R16, R44, R47, R51 ©2012 Broadcast Electronics...
Page 74 R61, R62 ..2 103-4951 RES,49.9K OHM,1/4W,1%,METAL ..2 103-5112 RES,51.1 OHM,1/4W,1%,METAL ..2 103-6193 RES,619 OHM,1/4W,1%,METAL R72, R73, R74 ..2 103-6343 RES,634 OHM,1/4W,1%,METAL ..2 103-6984 RES,6.98K OHM,1/4W,1%,METAL ..2 103-7503 RES,750 OHM,1/4W,1%,METAL ..2 177-1054 RES,TRMR,10K,VERT ADJ ..2 200-4742 DIODE,ZENER,1N4742A D18, D19 ©2012 Broadcast Electronics...
Page 75 ..2 402-0000 TY-RAP ..2 413-0106 TERM,TEST POINT,OVAL,RED E1, TP1, TP2, TP6, TP7, TP3, TP4 ..2 417-0172 SKT, 20 PIN SINGLE ROW,SAMTEC ..2 417-0200 CONN,HEADER 20 PIN ..2 417-0804 SOCKET,8-PIN DIP,BURNDY ..2 417-1404 SOCKET,14-PIN DIP XU3, XU6, XU13 ©2012 Broadcast Electronics...
Page 76 ..2 003-4743 CAP,CER MNLY,.47uF,50V,10% C61, C62 ..2 020-1026 CAP,LYTIC,1000UF,35,RADIAL C5, C6, C7, C10, ..2 020-2273 CAP,LYTIC,22UF,35V,RADIAL C21, ..2 020-4785 CAP,LYTIC,470UF,100V,20%,STDUP C2, C3, C28, C29, C50, C51, ..2 020-4795 CAP,LYTIC,4700UF,100V,20%,SNAP MT C1, C26, C27, C33, C34, C35, C36, ©2012 Broadcast Electronics...
Page 77 103-1404 RES,1.40K OHM,1/4W,1%,METAL R71, R72, ..2 103-1693 RES,169 OHM,1/4W,1%,METAL R92, ..2 103-2054 RES,2.05K OHM,1/4W,1%,METAL R91, ..2 103-2211 RES,22.1K OHM,1/4W,1%,METAL R4, R64, ..2 103-2212 RES,22.1 OHM,1/4W,1%,METAL R33, R93 ..2 103-2494 RES,2.49K OHM,1/4W,1%,METAL R36, R39, R44, R45, R46, R27 ©2012 Broadcast Electronics...
Page 78 RES,.005 OHM,5W,3%,WW R35, R58, R69, ..2 140-0006 VARISTOR,V130LA10A,GE MOV1, ..2 177-2035 RES,TRMR,200 OHM,25T TOP ADJ R65, ..2 177-2045 RES,TRMR,2K,10T,TOP ADJ 3299W ..2 200-0015 DIODE,ZENER,15V,1W,1N4744A ..2 200-0024 DIODE,ZENER,24V,1W,5%,1N4749A D30, ..2 200-0027 DIODE,ZENER,1N4750A,27V D31, ..2 200-1620 DIODE,FAST RECOVERY,16JPF20 D17, ©2012 Broadcast Electronics...
Page 79 ..2 227-2125 IC,IR2125 HIGH SIDE DRVR, 500V ..2 228-3525 IC,SG3525AN,PWM CONTROL ..2 229-0111 IC,AC INPUT OPTO-ISOLATOR U11, U12, ..2 229-0336 IC,VOLT REF DIODE LM336Z-2.5 ..2 230-0015 RECT,SILC,MR2406 D12, D13 ..2 230-0020 RECT,ULTRAFAST,MUR820 8A 200V TO220 D2, D3, ©2012 Broadcast Electronics...
Page 80 TERM,TEST POINT,OVAL,RED TP1, TP2, TP3, TP4, TP5, TP6 ..2 417-0230 CONN,20-PIN,MR SERIES,PCB,AMP J20, ..2 417-0370 CONN,MALE,PCB MT,PLB127690 (NOTE) J11, ..2 417-0600 SKT,IC 6 PIN XU11, XU12, ..2 417-0804 SOCKET,8-PIN DIP,BURNDY XU7, XU8, XU9, ..2 417-1604 SKT,16-PIN,DIP XU6, ©2012 Broadcast Electronics...
Page 81 Sil Pad TO220 .75x.5" ADHSV Berquist 3223- 07AC-58" 919-0430-600 ASSY,PCB FM250 IPA POWER CONTROL ..2 003-1054 CAP,CER,MNLY,.1uF,50V,20% C1, C2, C4, C5, C6, C7, C9, C10, C11, C12, C14, C15, C16, C19, C23, C27, C29, C30, C31 ..2 003-4743 CAP,CER MNLY,.47uF,50V,10% ©2012 Broadcast Electronics...
Page 82 ..2 103-2054 RES,2.05K OHM,1/4W,1%,METAL ..2 103-2241 RES,2.21K OHM,1/4W,1%,METAL ..2 103-2495 RES,24.9K OHM,1/4W,1%,METAL R15, R32, R50 ..2 103-3014 RES,3.01K OHM,1/4W,1%,METAL R6, R27, R39, R89 ..2 103-3325 RES,33.2K OHM,1/4W,1%,METAL ..2 103-3405 RES,34K OHM,1/4W,1%,METAL ..2 103-4024 RES,4.02K OHM,1/4W,1%,METAL R62, R68 ©2012 Broadcast Electronics...
Page 83 DIODE,1N4148 D1, D2, D4, D5, D8, D10, D13 ..2 210-3906 2N3906 PNP 40V 2A .35W 250MHZ ..2 210-7000 TSTR,2N7000,MOSFET ..2 211-3904 TSTR,2N3904 ..2 220-3183 IC,CA3183 5 TRANS ARRAY NPN U3, U4 ..2 221-0074 AMP,OP,BIFET TLO74CW U1, U2 ©2012 Broadcast Electronics...
Page 84 100-1041 RES,1K OHM,1/4W,1% R302, R306, R307, ..2 100-1051 RES,10K OHM,1/4W,1% R303, ..2 103-5112 RES,51.1 OHM,1/4W,1%,METAL R310, R311 ..2 103-8254 RES,8.25K OHM,1/4W,1%,METAL R304, R305, ..2 130-2423 RES,240 OHM,2W,5% R301 ..2 201-0027 ZENER VOLTAGE SUPPRESSOR,+/-27V D302, D303, D304, D305 ©2012 Broadcast Electronics...
Page 85 HSNG,20 POS MOD IV 3-87499-7 ..2 417-0123 HSNG,16 POS MOD IV 2-87499-9 ..2 417-0148 HSNG,10 POS MOD 1V 1-87499-7 ..2 417-0175 CONN, HOUSING, 20 PIN ..2 417-0224 KEYING PLUG MOD IV 87077 AMP ..2 417-0371 CONN,FEM,PLB12F0000,POSITRONIC ..2 417-0372 CONTACT,CONN,FC112N2 ©2012 Broadcast Electronics...
Page 86 008-1033 CAP,FEEDTHRU,1000PF,20%,500V ..2 009-1513 CAP,CER CHIP,15PF,500V,5% ..2 009-4723 CAP,CER CHIP,470PF,200V,5% ..2 130-3333 RES,330 OHM,2W,5% ..2 210-0151 TSTR,RF PWR MOSFET,MRF-151G ..2 213-6198 TSTR,RF PWR,2N6198 ..2 360-0003 FERRITE BEAD,.291 DIA ..2 370-0052 XFMR,RF AMP OUTPUT,FM-3C ..2 370-0721 INPUT TRANSFORMER ©2012 Broadcast Electronics...
Page 87 423-0005 #10 LOCK SPLIT (BRONZE) ..2 423-1012 #4 LOCK INT TOOTH (BRONZE) ..2 423-6002 #6 LOCK SPLIT ..2 423-6004 #6 LOCK SPLIT (BRONZE) ..2 423-6011 #6 FLAT .310 X .160 X .030 ..2 423-8005 #8 LOCK SPLIT ©2012 Broadcast Electronics...
Page 88 C5, C6, C7, C8, C15, ..3 046-0003 CAP,MICA,RF,80PF,350V,10% C13, C14 ..3 046-0005 CAP,MICA,150PF,350V,10% ..3 046-0022 CAP,MICA,RF,22PF ..3 100-1051 RES,10K OHM,1/4W,1% R4, R2 ..3 100-1231 RES,121 OHM,1/4W,1% ..3 100-2041 RES,2K OHM,1/4W,1% R5, R12 ..3 103-1021 RES,10 OHM,1/4W,1%,METAL R28, R14 ©2012 Broadcast Electronics...
Page 89 CAP,METAL FEED,1000PF,350V,10% ..3 101-2243 RES,CHIP,2.2K OHM,1/4W,5% R15, R16, R17, ..3 111-2223 RES,CHIP,22 OHM,1W,5% R18, R19, R20, R21, ..3 130-1023 RES,10 OHM,2W,5% R29, ..3 220-0035 IC,LM35DZ CELSIUS TEMP SENSOR ..3 360-0146 CHOKE,RF AMP DECOUPLING,FM-1C ..4 640-1400 WIRE,14GA,MAGNET 0.04 ©2012 Broadcast Electronics...
Page 90 DIODE,HOT CARRIER D201, D202, D203, ..3 360-0145 COIL,L1,FM-1C LPF (SBCM) L204, ..4 640-1200 WIRE,12GA,MAGNET 0.035 ..3 360-0147 COIL,3.5 TURNS,LPF,FM100C (SBCM) L203, ..4 601-0111 12 AWGBUSS .080 FLOOR STOCK FT 0.45 ..3 360-0148 COIL,4.5 TURNS,LPF,FM100C (SBCM) L202, L201, ©2012 Broadcast Electronics...
Page 91 417-0176 CONN,20 PIN FEM,AMP 1-350245-9 P15, P20, ..3 418-0026 PLUG,KEYING 350591-1 AMP ..3 418-0034 PLUG,BNC DUAL CRIMP 1-227079-6 ..3 418-0670 HOUSING,CONN,6PIN FEM ..3 601-1604 WIRE,AWG16, 19/29 YEL 0.75 ..3 601-1800 WIRE,AWG18 19/30 BLK ..3 601-2209 WIRE,AWG22,7/30 WHT ©2012 Broadcast Electronics...
Page 92: 10 Rf Technical Services Contact Information
701-0005 ANTISTATIC ZIPLOC BAG 4X6 4MIL 10 RF Technical Services Contact Information RF Technical Services - Telephone: (217) 224-9617 E-Mail: rfservice@bdcast.com Fax: (217) 224-6528 web: www.bdcast.com 11 Drawings The following pages present the FM-250C IPA unit drawings. ©2012 Broadcast Electronics...

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