Single Conversion LF Upconverter - G4JNT

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Figure 4 Sideband isolation at 1500Hz improved by fine adjustment ofamplitude balance. (No noise signal)Figure 5 - The finished thing!G4JNT Direct LF Upconverter Page 7

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Figure 2 - AF Drive Broadband noise source + 1.5kHz toneAll-pass network optimised for 1.0kHz and 1.5kHzCentre Freq 502kHzFigure 3 Centre Freq 137kHz , adjusted all-pass networkG4JNT Direct LF Upconverter Page 6

Page 1 and 2: Single Conversion LF Upconverter An
Page 4 and 5: ejection of -40dBc, which at LF wil
Page 8 and 9: AppendixNew Improved version with D
Page 10 and 11: LF Upconverter PCB mounted above th
Page 12: G4JNT Direct LF Upconverter Page 12

Single Conversion LF Upconverter - G4JNT

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