The pictures below show oscilloscope traces for gas mixture 50/50 Ar/CO2, all are shaper output.
Preamp 4 is described in GlueX-doc-1364, table 2, row 2; Preamp 3 is described in row 1.
2000V, 55Fe source
preamp 4, 55Fe, 50/50 Ar/CO2, 2000V
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preamp 3, 55Fe, 50/50 Ar/CO2, 2000V
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old preamp, 55Fe, 50/50 Ar/CO2, 2000V
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2000V, Cosmic rays
preamp 4, cosmic rays, 50/50 Ar/CO2, 2000V
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preamp 3, cosmic rays, 50/50 Ar/CO2, 2000V
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old preamp, cosmic rays, 50/50 Ar/CO2, 2000V
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2100V, 55Fe source
preamp 4, 55Fe, 50/50 Ar/CO2, 2100V
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preamp 3, 55Fe, 50/50 Ar/CO2, 2100V
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old preamp, 55Fe, 50/50 Ar/CO2, 2100V
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As above, for longer
preamp 4, 55Fe, 50/50 Ar/CO2, 2100V
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preamp 3, 55Fe, 50/50 Ar/CO2, 2100V
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old preamp, 55Fe, 50/50 Ar/CO2, 2100V
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2100V, Cosmic rays
preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V
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preamp 3, cosmic rays, 50/50 Ar/CO2, 2100V
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old preamp, cosmic rays, 50/50 Ar/CO2, 2100V
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As above, for longer
preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V
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preamp 3, cosmic rays, 50/50 Ar/CO2, 2100V
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old preamp, cosmic rays, 50/50 Ar/CO2, 2100V
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2200V, 55Fe source
preamp 4, 55Fe, 50/50 Ar/CO2, 2200V
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preamp 3, 55Fe, 50/50 Ar/CO2, 2200V
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As above, for longer
preamp 4, 55Fe, 50/50 Ar/CO2, 2200V
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2200V, Cosmic rays
preamp 4, cosmic rays, 50/50 Ar/CO2, 2200V
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As above, for longer
preamp 4, cosmic rays, 50/50 Ar/CO2, 2200V
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