(S) MOTOROLA MRF 238 Advance Information | The RF Line 30. W 160 MHz RF POWER TRANSISTOR NPN SILICON NPN SILICON RF POWER TRANSISTOR . .. designed for 13.6 Volt VHF large-signal amplifier applications in industrial and commercial FM equipment operating to 175 MHz. Ideally suited for marine radio applications. @ Specified 13.6 Volt, 160 MHz Characteristics Output Power = 30 Watts Minimum Gain = 9.0 dB Efficiency = 60% FT evl lr o [ J \ 4 | MAXIMUM RATINGS (hele Rating Symbol Value Unit . to Collector-Emitter Voitege VcEO 18 Vde NY EL tM Collector Base Voltage Voeo 36 Vide es Emitter-Bese Voltsge VEBO 40 Vide Collector Current Continuous Ic 4.0 Adc Soiie emiTTER Tow! Device Dissipetion @ Tc = 26C Pp 65 Watts 2. BASE Derate Above 25C 0.37 wc See EETOR Storage Temperature Range Totg, -65 to +200 C Stud Torque (1) = 65 In. Lb. {1} For Repeated Assembly use 5 In. Lb. This is advance information and specifications are subject to change without notice. 9-42MRF238 ELECTRICAL CHARACTERISTICS (Tc = 25C unless otherwise noted.) [ Characteristic | Symbot [| Min [| Typ | Mex | Umit OFF CHARACTERISTICS Coltector-Emitter Breakdown Voltage BVcEO 18 - - Vde (1 = 100 mAdc, Ig = 0) Collector-Base Breakdown Voltage BVcBO 3% - - Vde (ig = 15 mAde, ig = 0} Emitter-Base Breakdown Voltage 8VEBRO 4.0 = - Vde (1g = 5.0 mAdc, Ic = 0) ON CHARACTERISTICS DC Current Gain hee 5.0 _ - ~ (ig = 1.0 Adc, Vcg = 5.0 Vde) DYNAMIC CHARACTERISTICS Output Capacitance Cop - 110 130 eF (Veg = 15 Vde, tg = 0, f = 1.0 MHz) FUNCTIONAL TEST (Figure 1) Common-Emitter Amplifier Power Gain Gpe 9.0 10 - dB (Veg = 13.6 Vac, Pout = 30 W, Ic (max) = 4.0 Ade, f = 160 MHz) Collector Efficiency n 60 - - % {Voc * 13.6 Vie, Pout * 30 W, Ic (max) = 4.0 Adc, f = 160 MHz) FIGURE 1 160 MHz TEST CIRCUIT SCHEMATIC RFC3 cro cit O+ =o . 7 RCc8 -7ANCS +13.6 Vde o- Ls Cc? LN IE RF Output RF input 7 ce C1 200 pF, 350 Vdc, UNELCO C2 100 pF, 350 Vde, UNELCO C3 40 pF, 360 Vdc, UNELCO C4,C5 80 pF, 350. Vdc, UNELCO C6 1.020 pF, 40z. ARCO Trimmer C7 100 pF 350 Vdc, UNELCO CB 0.1 uF ERIE Disc Ceramic C8 0.1 uF TANTALUM C10,C11 680 pF ALLEN BRAOLEY Feedthru RFC1 0.15 WH Molded Choke Bead FERROXCUGE Bead RFC3 FERROXCUBE Choke, VK 200-48 RFC2 10 Turns, #18 AWG on 470 Ohm, 1 Watt Resistor u1 2 L3 4 3.3 x 0.2m AIRLINE Inductor 1.0 x 0.2cm AIRLINE Inductor 1.2 x 0.6 cm Grass Pad 1.2 x 0.6 cm Brass Pad and 2.0 x 0.2cm AIRLINE Inductor Board: G0, , = 6, t= 62 mils 2 sided, 2 oz. Clad Connectors: Type N 9-43MRF238 FIGURE 2 OUTPUT POWER versus INPUT POWER FIGURE 3 OUTPUT POWER versus FREQUENCY 40 _ = 3 Vcc = 13.6 Vde e Pin = 3.0W < <3 = = e = 32 s : 2 2 30 e e 2 = 2 EB E 2 > o 26 = 24 22 20 Pin, INPUT POWER (WATTS) f, FREQUENCY (MHz} FIGURE 4 OUTPUT POWER versus SUPPLY VOLTAGE FIGURE 6 SERIES EQUIVALENT IMPEDANCE 38 6 _ t= 160 MHz e 34 pi, = 3.0 Watts = 32 z= 5 37 = 2 2 EL = 26 = > = 4 S27 2 20 18 15 Vcc, SUPPLY VOLTAGE (VOLTS) (HW) LNINOdWOD JONVLSIS3y 20% t seo Larne aud TYPICAL IMPEDANCES Zin 0.83 - j0.50 Zou 2.18 + j0.72 Ce Ne NOR NOTE: Reactive components are highty dependent upon Cireuit grounding. Chart is intended to show reletive x positions of input and output and the general locus of PPR RIK NSN NA 9-44