RCA BPA-10 Installation, Operation & Maintenance Instructions Manual Download | Manualshive

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Summary of Contents for BPA-10

Page 1: ...www SteamPoweredRadio Com I I I I I I I I I I I I I I I I I I I I I I ANTENNA TUNING UNIT Type BPA 10 INSTALLATION OP RATION MAINTENANCE INSTRUCTIONS Printed in U S A 1B 30168 3 21 46 ...

Page 2: ...uning Procedure with R F Bridge Tuning Procedure without R F Bridge Final Check Remote Metering Equipment Maintenance Parts List ILLUSTRATIONS Figure 2 1 Type BPA 10 Antenna Tuning Unit Exterior View 2 Simplified Circuit Diagram K 861732 3 Coupling Circuit and Tuning Unit Network K 861757 4 Antenna Tuning Unit Interior View 5 Antenna Tunin g Unit S hematic M 428316 6 Antenna Tuning Unit Outline M ...

Page 3: ... the addition of a series capacitor and in a negative direction if operating from a line of lower impedance than the antenna resistance Monitoring Rectifier Output Impedance to operate into 20 000 ohm bridging load Output Level program level including bridging Joss At 5 10 kw output 9 vu At 1 kw output 15 vu Rectified current 75 ma d c maximum into a maximum of l 000 ohms Frequency Characteristic ...

Page 4: ...www SteamPoweredRadio Com 4 Figure 1 Type BPA 10 Antenna Tuning Unit Exterior View I I I I I I I I I I I ...

Page 5: ...at form or a steel angle cradle by means of the side flanges at the bottom of the housing Rear mounting strips also are provided to permit mounting the unit on two up right posts Dimensions are given in the outline drawing Figure 6 Care should be taken at installation to select a posi tion where the antenna lead will be as short as possible It is also important to insure adequate grounding by conn...

Page 6: ...gure 2 which shows a simplified circuit diagram the reactances are r1 cosP sin P X2 1 v i cos P Xa sin P sin p x 1 Line impedance Antenna resistance Phase shift through network It will be appreciated that choice of p near zero or 180 degrees leads to large values of reactance In all arms since sin p approaches zero for these values On the other hand if we take p 90 degrees these equations simplify...

Page 7: ...and the antenna re sistance and the antenna reoctonce wi ll hove been removed as a cause of loss In making these adjustments the line should be dis connected and_the impedance bridge connected across the input terminals to determine when the desired value of 60 ohms hos been obtained When measurements show that the input impedance of the tuner with the antenna connected is 60 ohms resistive the li...

Page 8: ...nergy for operation of a monitoring ampli fier The method of remote antenna current indication as outlined herein has been approved by the Federal Communications Commission The remote meter should require 25 to 50 ma direct current for full scale deflection and should have a scale corresponding to that of the antenna ammeter M 1 It should be equipped with a shunt adjusted so that the deflections o...

Page 9: ... Dwg No No No No K 891875 Ml Meter frequency determined See Ml 19465 See Ml 7444 C Rl Resistor 6 4 K 90 W 17899 K 890162 2 R2 Resistor IO K 90 W 17900 K 890162 3 R3 R5 Resistor 250 ohms 10 W 17901 K 891887 2 See Ml 7444 C R4 Resistor 125 ohms 10 W 17902 K 891887 1 69860 P 32221 532 69864 P 32220 683 SI Switch 250 V 30 amp 90038 K 890957 1 42335 P 722009 547 Tl Transformer 17897 K 900433 501 T 6115...

Page 10: ...0 3 C I M I S I L 3 Q 6 1 C 4 J 11 i e t 1t c 5 REMOTE ANT 8 r c 6 AMMETER AND c t INTERLOCK _ 1 RELAY LOCAT O IN I ie R 4 I I I I II I R 3 R 5 7 AUDIO OUTPUT TRANSM HOUSE l tgol __ _ I J 0 cO I 5 R I R 2 t M 4283 6 Z 3 L __________________ __________________ _________ J ...

Page 11: ... I OIi WW Q I 1 I n 0 II I I l t I IO I co l t r l3 N I N a _ 2 __ I _J N I I 0 xow 11 ot I ao ll N XO dW I t t t 6 r I f z ft I I I I 0 I I It I ffll O I I I I f I i1 1 J NO c ri I 0 I I Figure 6 Antenno Tuning Unit Outline 11 I ...

Page 12: ...www SteamPoweredRadio Com I I I I I I I I I I I I I I ...

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