Transmitter Tests; Figure 98. Location Of U9 And Pins Voltages To Check. In Receive Mode, Check, U9 Pins 11 (0V), 12 &13 - NORCAL NC2030 Manual

L15 - T37-6 16T #26 - 10" of wire
L16 - T37-6 18T #26 - 10" of wire
L17 - T37-6 17T #26 - 10" of wire
L18 - T37-6 13T #26 - 8" of wire
Common between both bands
Q13, Q14, Q16 - BS170 MOSFET PA transistors
Do not mount L14 at this point in time.
We want to test the transmit/receive switch before the
transmitter is actually fired up.

Transmitter Tests

Figure 98. Location of U9 and pins voltages to check. In receive mode, check, U9 pins 11 (0v), 12 &13 (2.9v).
First check U9 (shown above, upper left hand corner of the board) for the 0v on pin 11 and 2.9v on pins
12 and 13. These are digital logic levels, so they might not be exactly 0v or 2.9v.
Hook up a keyer paddle to the paddle jack and adjust the keyer cw speed pot to send a series of very low
speed dashes. Since L14 has not been connected yet, there will be no transmitter output, we just want to
make sure the transmit signals are working properly. When sending the low speed dashes, make sure
the voltages on pin 11, 12, and 13 toggle between 0 and 2.9v.
Norcal NC2030 v5 12-18-05
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