Connections to front-end module flying lead

There are actually two bulkhead mounted sockets - one to feed the 408MHz module, the other to feed the 1420MHz module. The colour coding matches that of the Focus box flying leads.

 

Pin

Colour

'blue' plug (1420MHz)

'yellow'plug (408MHz)

1

red

 +ve thermostat op-amp rail

Pre-amp connection

2

blue

 -ve thermostat rail

Pre-amp connection

3

green

 Base-plate temp. monitor

Pre-amp connection

4

yellow

 Base-plate temp. monitor

Post-amp +ve supply

5

white

 Sma flying lead inner

Post-amp -ve supply (chassis)

6

black

No through connection 

Same as pin 4

7

brown

nc 

No through connection 

8

mauve

reg 

Base-plate temp. monitor

9

orange

reg

Base-plate temp. monitor 

10

pink

 Sma flying lead outer/chassis

No through connection

11

turquoise

 -15v post-amp supply

 +ve thermostat op-amp rail

12

grey

 Same as 11

 -ve thermostat rail