100W PEP 420-450Mhz PUSH-PULL LINIER AMPLIFIER | Schematic Diagrams


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100W PEP 420-450Mhz PUSH-PULL LINIER AMPLIFIER

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rf amplifier 300x217 100W PEP 420 450Mhz PUSH PULL LINIER AMPLIFIERThis is 100 watt linear amplifier and may be built using two MRF309 transistors in push-pull, requiring only 16 watts drive from 420 to 450 MHz.

The 100 watt linear amplifier operating from a 28 volt supply, 8 dB of power gain is achieved along with excellent practical performance featuring: maximum input SWR of 2:1, harmonic suppression more than-63 dB below 100 watts output, efficiency greater than 40%, circuit stability with a 3:1 collector mismatch at all phase angles.

100 watt linear amplifier Parts list :Ti & T2 – Balun. Unbalanced to Balanced RG 58, I = 2.5″R1 : 1 k, 1/2 WR2 : 10 ohm 1/2 WR3 : 10 ohm 1/2WR4 : 5.6 ohm 1 WR5 : 5.6 ohm 1 WR6 :  2.7 ohm 1/4 WZ1 & Z3 : Microstrip – W = 200 mils, I = 1 8″Z2 & 24 : Microstrip – W = 200 mils, I = 300 milsZ5 & 26 : Microstrip – W = 150 mlls, I = 300 milsZ6 & Z8 : Microstrip – W = 150 mils, I = 1.4″RFC 1,4 : Ferroxcube Bead 56 590-65-38RFC 2,3 : 0,16 uH Cambion Molded CoilRFC5, 6 – 1 Turn #20 Enameled Wire Wound on 5/16″ BoltRFC7, 8 : VK200 20/48C1,3,4,5,7,8,11,15 : Underwood 40 pFC12,16 : Underwood 25 pFC13, 14, 22, 23 : Underwood 18 pFC9, 10, 18,20 : I uF TantalumC21, 24 : Underwood 10 pFC2, 6 : Arco 403C17.. 19 : Underwood J102. 1000 PF Feed ThruC25, 26 : 0,1 uF, Erus  Red CapL1 : 24 nH, #14 Wire, I = 1.2″L2 : 12 nH, #14 Wire, I= 0.6″L3 : 24 nH, #14 Wire, I = 1 2″Board : G10, cR : 5. t=0.062″ , I = 8.0″, W = 4.0″Q1 : 2N5192Q2 : 2N5194Q3 : MRF309Q4 :  MRF309D1 : 1N4001

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