■ FIGURE 6.
regenerative SW radio?
QI believe you missed modifying the two amplifiers I originally attached to my email you
answered in the October 12 issue.
AThis is a terrible design; there is no control over the collector current.
Every time you build it, the
value of the 10K resistor will
have to be adjusted.
A 2N2907 PNP silicon
transistor can be dropped
right in. Replace the 10K
resistor with a 25K rheostat,
and adjust with a 1 kHz signal
such that the output signal is
rail to rail without clipping. If you
want to use an NPN, 2N2222 will
Remember! Send any
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