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NJQRP Sniffer circuit question

Discussion in 'Homebrew and Kit Projects' started by K4PP, Apr 8, 2012.

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  1. K4PP

    K4PP Ham Member QRZ Page

    I have collected parts to build a NJQRP sniffer

    I only have a 0-100uA meter, not a 0-200uA. Should I be concerned about this meter working with the circuit. Would it be worthwhile to modify R11 to limit current or place a resistor in parallel with the meter.

    Thanks for any input,

    Paul, K4PP
  2. KA5S

    KA5S Subscriber QRZ Page

    I don't see one on the schematic and you might not need it, but you can add a 1or 2 K ohm adjustable resistor in series with R11 to adjust instrument sensitivity, or just collapse the whip if the meter pegs out. Check out the instruction manual.

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