The
components in this phase are marked with letter
T in
suffix.
For
schmematic diagram and component list refer to Assembly
manual which is enclosed with your kit.
Assembly of transmitter circuits
Schematic diagram
Click Picture
to Enlarge
Component placement
Click Picture
to Enlarge
Install inductors L1T and L2T.
Install integral circuits IC5T and C41T.
Install diodes D1T to D4T.
Install resistors R1T, R2T, R3T, R4T, R5T, R7T and R9T to R20T.
Install diodes D5T to D8T.
Install resistors R21T to R39T.
Install resistors R40T to R46T, R49T,
R50T and R51T.
Install USM capacitors C1T, C2T, C4T, C5T and C6T.
Install NPO capacitors C3T and C7T.
Install electrolytic capacitor C8T.
Install
integral circuits IC1T and IC2T.
Install transistors TR1T, TR2T, TR3T and TR4T.
Install electrolytic capacitors C9T and C14T.
Install
NPO capacitors C10T, C11T, C12T, C13T.
Install two pin header SV2PB.
Install relay RL1T.
Install
USM capacitors C15T, C16T, C17T, C18T and C19T.
Install NPO capacitors
C20T, C22T, C24T.
Install electrolytic capacitors C21T and C25T.
Install
integral circuits IC3T and IC4T.
Install USM capacitors C26T, C27T, C28T and C29T.
Install NPO
capacitors C23T, C35T, C37T, C38T, C39T and C42T.
Install electrolytic capacitors C30T, C31T,
C32T, C33T, C34T, C36T and C40T.
Install transistors TR5T, TR6T, TR7T and TR8T.
Install
jumper KS1T.
Install jumper wire to connect
R8S and RL1T.
Transmitter: Image rejection pre-adjustment
With
trimmer R9T, adjust the resistance between PIN1 of IC1T and PIN2 of IC2T to 5.6 kOhm.
Connect power supply.
Check the voltage on all pins
of IC1T to IC4T.
| pin |
voltage |
| 1
|
5.77 V |
| 2
|
5.77 V |
| 3
|
5.77 V |
| 4
|
0 V |
| 5
|
5.77 V |
| 6
|
5.77 V |
| 7
|
5.77 V |
| 8
|
10.85 V |
K6: cut 190mm of
two wire flat ribbon cable and install crimp connectors SV2PA and SV2PB as per photo.
Install K6.
This completes installation of components in phase 9.
Transmitting
Connect KP9 to sound card output.
Connect stereo audio cable between KP9 and sound card output,
connect USB cable and power up G59 board.
Sound card settings: under Mixer device - Audio output: Mute all except Master volume and Wave
In GSDR Setup-Sound Card: set output voltage to 0.50 V
Click on Start, select
20m band. Set LOSC to 14.020 MHz and VFO A on 14.030.
Click TUN (tune).
The red LED will light
and relays will click. You are now transmitting.
Check your transmitting
signal on external receiver tuned to 14.030 MHz. Check
also it's image on 14.010 MHz.
Fine tune trimmer R9T
for maximum image rejection. Turn not more than 1-2
turns either way.
Transmitter power output
is 10 mW. [ 0.01W]
Switch OFF TUN (RX mode). Disconnect sound card
cable from KP9.
Tune your external receiver to 14.020 MHz and
listen to G59 LOSC signal.
To null LOSC signal, fine tune trimmer R50T and
R51T.
Again, do not turn trimmer pot more than 1-2 turns
either way.
Next phase: Microphone preamplifier assembly
Block
Diagram | Phase
1: Power Supply | Phase
2: Microcontroller circuit | Phase
3: Local osciallator Si570 |
Phase 4: G59 USB connection | Phase
5: G59 Receiver assembly | Phase 6: G59 Input-Output HP-LP Filters |
Phase 7: Band pass filters and control logic
| Phase 8: CW monitor
| Phase 9: Transmitter circuits assembly |
Phase 10:
Microphone preamplifier
| Phase 11: Si570 Quasi oven circuit
| GBOX assembly
|
