Getting the most from your G4DDK VLNA - NTMS

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Curing any unwanted oscillation Note the two pieces of absorber material
Tune up • Set bias as described in the VLNA document • Connect 50 ohm SMA termination to input • Connect output to a spectrum analyser set to cover 100MHz to 2GHz • Reference to 0dBm • Power up the preamp
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 and 10: Initial attempts to improve perform
Page 11 and 12: How’s s that Unfortunately, not u
Page 13: Source, drain and L1/L2 for 23cm VL
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

Getting the most from your G4DDK VLNA - NTMS

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