The
Rockless QRP
Circuit Board Interconnection and Jumpers
(Last Update:
The above drawing is a composite of the two jumpers used
on the main
board,
plus interconnections between the Vfo and
power, switches and jacks. This may be helpful to Rockless Builders in
their
final assembly stages of their Rockless.
Note the following points:
1. All colored lines go from
one end to the other. There are no
intermediate connections to board points
the colored wires cross.
2. On the key jack you may
need to reverse the tip and ring connections
if your paddle works backwards – ie it send
dits in place of dahs”
3. The solder hole where the
VFO gets power is marked on the board “osc”.
4. Note that two terminals of
the volume control are connected together
to present a variable resistance across
terminal 6 and 7 of U2 the audio
amplifier chip. Test for minimum resistance when fully
counter clockwise.
The 1 megohm resistance will be measured
when turned fully clockwise.
The 1 megohm fixed resistor normally connected to these points is
omitted.