Getting the most from your G4DDK VLNA - NTMS

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Getting the most from your G4DDK VLNA - NTMS

Getting the most from your G4DDK VLNA - NTMS

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More source inductance<br />

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R2<br />

0 Ohm<br />

MGF4919G ‘raised up’

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More source inductance G S S D R2 0 Ohm MGF4919G ‘raised up’

How’s s that Unfortunately, not unconditionally stable Open circuit input = strong oscillation around 1100MHz RW3BP suggested more source inductance

Page 1 and 2: Getting the most from your G4DDK VL
Page 3 and 4: WD5AGO 23cm pre-amp
Page 5 and 6: 23cm VLNA
Page 7 and 8: Gain results for 23cm VLNA 1 Gain s
Page 9: Initial attempts to improve perform
Page 13 and 14: Source, drain and L1/L2 for 23cm VL
Page 15 and 16: Tune up • Set bias as described i
Page 17 and 18: Improvement in performance - Noise
Page 19 and 20: And • Replacing R3 (51R) with a 3
Page 21 and 22: Noise figure bandwidth Noise figure
Page 23 and 24: 13cm VLNA2 • Improved noise figur
Page 25 and 26: 13cm VLNA2 Position of L1 and L2 fo
Page 27 and 28: 13cm VLNA2 Gain spread 13cm VLNA2 g
Page 29: Thank you! More information @ WWW.G