Vectronics VEC-1120K - Manual (Page 26)

VEC-1120K/1130K/1140K/1180K Instruction Manual
24
! ! 3. Connect a speaker or headphones to jack J2 on the receiver.
! ! 4. Set the receiver gain fully CW (clockwise) and the tuning knob fully
CCW (counter clockwise).
! ! 5. Select a tuning tool that properly fits coil L1. The 20 meter kit
requires a hex type alignment tool. The other kits require a small
blade type tool that matches the slot in the coil core. Or, a jeweler’s
screwdriver may be used.
! ! 6. Set coil L1 tuning core to the top of the coil form.
! ! 7. Connect a fresh 9-volt alkaline battery to the receiver, and turn it on
using the push-action power switch.
! ! 8. Carefully adjust the core in coil L1 until the generator signal is heard.
Set the coil for zero beat. Note that metal alignment tools will cause
some frequency shift, and interact with the tuning when removed or
inserted into the coil. You will have to adjust the coil in small
increments, and observe the point where the proper frequency is
reached when the tool is removed.
Important Note: Allow at least a 10-kHz tuning overlap on the band edges to
compensate for aging and long-term drifting.
Using a companion QRP transmitter:
! ! 1. Connect the QRP transmitter to a dummy load. The QRP transmitter
should be located near the VEC-11xx direct conversion receiver.
! ! 2. Connect a speaker or headphones to jack J2 on the receiver.
! ! 3. Set the receiver gain fully CW (clockwise) and the tuning knob to a
dial position that corresponds to the transmitter frequency.
! ! 4. Select a tuning tool that properly fits coil L1. The 20 meter kit
requires a hex type alignment tool. The other kits require a small
blade type tool that matches the slot in the coil core, or use a small
jeweler’s screwdriver.
! ! 5. Set coil L1 tuning core to the top of the coil form.
! ! 6. Connect a fresh 9-volt alkaline battery to the receiver, and turn it on
using the push-action power switch.
! ! 7. Key the QRP transmitter so it is producing a carrier.
! ! 8. Carefully adjust the core in coil L1 until the QRP transmitter signal is
heard. Set the coil for zero beat. Note that metal alignment tools will
cause some frequency shift, and interact with the tuning when removed