Summary of Contents for BTF-5E1

Page 1: ...edRadio Com TO BE INSERTED IN IB 8027531 1 00 3LJD Broadcast Equipment FM Transmitter Power Conversion Kit BTF 5E1 to BTF 20E1 ES 560643A for use with RCA BTF 5E1 transmitters shipped prior to October 1972 18 8027981 ...

Page 2: ...s based upon receipt of these items hem 1 2 3 4 5 6 7 Quantity 1 1 1 1 Description Power Determining Kit Blower Plate Transformer Harmonic Filler Blower Mounting Kit Power Supply HV Rectifier Reference Ml 560508 Ml 560347 2 Ml 34507 Ml 27967 1 or Ml 27967 2 Ml 560518 Ml 560342 1 Mt 560340 1 TRANSMI TTER MODIFICATION WARNING Always discharge and ground circuits prior to touching them to avoid perso...

Page 3: ...ed must be replaced with their high power counterparts from the Power Determining Kit To remove 1Z5 open left hand back door and remove panel above plate resistors 1R25 1R26 and 1R27 figure 14 Be careful not to damage diodes when removing 1Z5 because diodes are loose in their sockets when the DC output connectors are removed a Install reflectometer 1Z5 iMl 560510A Item 8 in output transmission lin...

Page 4: ...C102 Connections b1 tween 1XV101 and 1XV 103 are made by means of three jumper wires which are supplied connected to the 1XV103 socket assembly Refer to Wiring Diagram figure 39 and connect jumpers as follows Wire 57 C134 to C129 Wire 58 C132 to C139 Wire 59 C131 to C128 Note that socket assembly for IXV103 Item 15 includes a clamp assembly used for connection to the anode of driver tube IV 103 Re...

Page 5: ...mperature changes may lead to condensation The alternate pressurized filter M l 56 1507 permits filter mounting outdoors 01 indoors on the antenna side of the gas stop When installing the filter keep in mind the clearances necessary for the various size transmission line inner and outer conductors A clearance of 1 8 is required at each joint for all miter conductors and for 1 5 8 line inner conduc...

Page 6: ...supply cover raised use an phmmeter to assure that 2S4 grounds the high voltage positive terminal 27 Equipment Connections a Make necessary connections between transmitter cabinet and power supply cabinet referring to figures 38 39 of the instruction book and Table 1 of this addendum Use original labeled wires for these connections TABLE 1 TRANSMITTER POWER SUPPLY INTERCONNECTIONS F om Power Suppl...

Page 7: ... POWER LOWER pushbutton to reduce power output considerably from last operating value Apply plate voltage Tune transmitter and adjust power as described in BTF 20E1 instruction book IB 8027531 1 33 PA Saturation If problems are experienced with AM noise the PA stage may not be receiving enough drive to saturate The grid current of this stage should be 80 mils or more and could be as high as 250 mi...

Page 8: ...www SteamPoweredRadio Com RCII Broadcast Equipment Commun1cat1ons Systems Division Front and Cooper Streets Camden New Jersey U S A 08102 ...

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