Technical kit information, last update 2017-04-10
© Copyright Juha Niinikoski OH2NLT and Matti Hohtola OH7SV.
Commercial use of this information is not allowed without a permission.

JUMA TRX2A All Band model boards

DDS board
Schematics Rev B
Layout top BW | Layout top Color | Layout bottom BW | Layout bottom Color
Part list Rev B
Top Picture | Bottom Picture
Notes | Construction gallery | Description | Adjustments
FILTER board
Schematics
Layout
Part list
Picture
Description
MAIN board
Schematics Rev B | Schematics Rev C
Layout Rev B | Layout Rev C
Part list Rev B | Part list Rev C
Picture of Rev B | Picture of Rev C
Description | Adjustments
POLYPHASE board (two boards needed)
Schematics
Layout
Part list
Picture top | Picture bottom
Description
All band PA board
Schematics
Layout top Rev A | Bottom Rev A | Layout top Rev B | Bottom Rev B
Part list Rev A | Part list Rev B
Picture 1 | Picture 2 | Picture 3 | Picture 4 | Drain current jumper
SWR transformer modification | SWR transformer installation
PA FETs 1 | PA FETs 2 | PA FETs 3 | PA FETs 4 | PA FETs 5
Adjustments with important note!
CONNECTOR board
Schematics
Layout top | Layout bottom
Part list
Top Picture | Bottom Picture
Notes
RF filter board for all bands
Schematics Rev A
Layout top | Layout bottom
Part list
Toroidal coils
Picture top | Picture BPF | Picture LPF | Picture bottom | Picture bottom right
Electromechanical parts
Part list
Flat cable dimensions
Power supply chassis socket | Power supply plug
| Mic instructions
All band construction
All band model internal pictures
Options

Spur elimation JUMA TRX2 SE Option.
For main board Rev B
juma-trx2-se-option-instruction.pdf

Enhanced roofing Filter JUMA FL2 Option
JUMA TRX2 Firmware updates

See the relase notes
Current firmware V 1.08 (hex file for upload) Save with mouse right button
Programming instructions
Software information for developers

CONSTRUCTION HINTS AND DETAILS
Tools for assembly
SMD soldering tips
Kit packet examples: Main | Main bags | Filter | Filter bags | Polyphase | Polyphase parts | Connector | Connector parts
DDS board voltage regulator mounting
Main board fixing to the side Al prifile
GND terminal on main board for easy measuring
Support on the cover for polyphase and filter modules
Speaker holes drawing
Ground a non ESD compatible soldering iron to the PCB GND to avoid break up of MOS components
Microphone wiring
Simple microphone construction instruction
Surplus mic enclosure examples 1 | examples 2
JUMA TRX2_ICD programming_cable.pdf

TROUBLESHOOTING HINTS
Main board DC voltage table
Filter board DC voltage table
SPI serial bus description

CUSTOMIZING TIPS
Customizing the AGC speed
Fold out feets
Cable for NUE-PSK Modem

MODIFICATIONS
Line input modification for digi modes (Main board Rev B only)

Other options
Option boards

Two band PA board

Link to JUMA-TRX2 main page