Ten-Tec SSB-CW-AM Instruction Manual page 81

6B. Shielded First Mixer Section
This circuitry will be enclosed within a shield just like the VCO's.
Therefore, careful attention to correct parts selection is especially
important. Figure 6.2 is provided for your convenience. The
complete Phase 6.0 parts placement drawing is on page 58.
Figure 6.2
6-20. Install the 100 ohm trimmer potentiometer R70.
Be careful not to damage the mounting legs when inserting.
Correctly installed, it is normal to have some space between the
the board and the base of the trimmer.
6-21 . Install the shielded adjustable coil T6, similar in style
but larger than the 455 kHz transformers installed in Phase 4.0.
6-22. Install T9, a pre-assembled trifilar balun transformer,
with SIX pins, (identical to T4 and T5 installed in Phase 5.0).
Notice carefully which end of the plastic base has the two
copper-colored primary wires coming from the ferrite core over
the base to two pins. This transformer must be installed with
this primary end nearest trimmer R70 as indicated by the notches
in the board silkscreen and Figure 6.2.
6-23. Install resistor R57, 220 ohms (red-red-brown).
1254 - Assembly - 60