, li ne. 20 stern ave. springfield, new jersey 07081 u.s.a. telephone: (973) 376-2922 (212) 227-6005 fax: (973) 376-8960 the rf line npn silicon rf power transistors . . . designed for power amplifier applications in industrial, com- mercial and amateur radio equ ipment to 30 mhz. ? specified 12.5 volt, 30 mhz characteristics - output power = 50 watts minimum gain = 1 1 db efficiency = 50% maximum ratings raimf^ syitfeal value unit colllctor-e miner voltege v -f iftsllt i figure 1 30 mhz test circuit schematic 1 a i a ? u-1! ci, c3. c4 c5, cs ? e ce? 1000 ri-toon li ?0 15 p l2 ? ferw l3 ? 3 tuf l5-ferr inpuvoutpu bo*rd-gi ll j t cs i ^ cs c7 i; a c? 13.1 v? "tt! ? ' j"j c4 # l' lit ^t '" ^ cz ik i 10 pf. arco 424 - 170- 780 pf. arco 4?9 rie 0.1 ilf a 100 v red caps pf unelco. 350 v? 35 vdc . 2.0 vv carbon n molded choke miller 3xcube. vk200 20 4b is. #14 bare tinned wire. 0.3* (0.791 1.d x 0.38" 10.971 long u. #20 enamel wire. close wound on r1 3xcube #56-570-is/3b. 9 ferrile beads, on r long #20 wire t connectors ? type n a? teflon mounted on t v ? 4" ? 2" 5eezak bo. MRF450 MRF450a sow -30 mhz rf power transistors npn silicon ^rpsr\ /^^*~a?2=^ ( \ \s/\s >v^l i ? l ~ ..i,.. )._ i <&& ^== ^mshff sm*r i i*s _xi !? di;^ ' j oil 1-1 ; j w ^ cas t 21 1-07 l-* , ml .ul _,__.,_ ; i m _^ mrmoo pi ftft _?( ! r'u.~1qr"4 j -u xjl_j ^^^^""^i l t /?? ', \ ?om x-n^,^^,^-^ oeaisortcwcto w ff % . ~ snui -|- "i:.? m'oina "i"4j^? ifu^in ' ? i " *o?un?i ; jj ,, a ???? mrf460a hi?*t? .) . '? ' i thriion wot ??_ hii MRF450, MRF450a electrical characteristics |tc = 2sc unte.soinerum nond.1 ch*ract?ri*tie symbol i ?"" off characteristics collector emitter breakdown voltage flc = 100madc. ib = 0) collector-emitter breakdown voltage "c ? 20madc. vbe =01 col lector- bale breakdown voltage ilc ? 20madc. if - 01 emitter base breakdown volta?e iie - lomadc, lc - 01 on characteristics dc current gain (1c - voadc. vce ? 5.0 vdc) dynamic characteristics output caoacitance ivcb- 15 vd. ie -o.i- 1.0 mhi) vcbriceo v(bpices vibricbo v(briebo hfe cob 20 40 40 4.0 10 - ~ ~ " ~ - ~ - - ~ ~ - vdc vdc vdc vac - 200 r pf functional tests (figura 1) commcn-emitier amplifier powvar gain ivcc= 13.6 vdc, poui- sow. lclm?xl -6.13adc.f-30mh:) collector efficiency 'v^c =136 vdt. pout - sow, lf;(frtax) = 6.13 adc. f = 30 mhz) sent! equivalent input intpedance ivcc- 13.6 vdc. poul. 50w:f-30mhz) ssribs equivalent output impedance ivcc- 13.6 vdc. p0ul- sow, f = 30mhz) gpe i) ~i 2out 11 50 ~ " 15 * 1 56j8ft 174-) 50 ? _ " " ds % ohmt ohm, figure z-input power varwi output power figure 3 - outtut power "araji supply voltage '5 20 25 3,0 3.5 40 45 50 f,n, input power ivvattsl 90 ? m q? 0 . ? ? ^^ ^ ^ <** fir, f ^^^ = 3.5 w - 30 mm i 8.0 so 10 11 12 13 14 vcc. supply voltagt ivolts]
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