Elecraft 2T-Gen - Manual (Page 2)

2
Assembly

Sort the resistors by value. Some of the color bands may be hard to read; use a magnifying glass if necessary. A
Digital Multimeter (DMM) should be used to confirm the values.

Orient the printed circuit board with the silk-screened side up and the title “2T-gen” at the upper left.

Install the following resistors in their indicated positions, starting at the top of the PC board and working down
and right. (Complete the left column, below, then the right column.)
__ R10, 100k, 5% (brn,blk,yel)
__ R16, 22k, 5% (red,red,org)
__ R11, 1M, 5% (brn,blk, grn)
__ R8, 22.6k, 1% (red, red, blu, red, brn)
__ R7, 6.8k, 5% (blu,gry,red)
__ R9, 3.3k,5% (org,org,red)
__ R12, 22.6k, 1% (red, red, blu, red, brn)
__ R15, 22k, 5% (red,red,org)
__ R14, 10 k, 5% (brn, blk, org)
__ R17, 22k, 5% (red,red,org)
__ R5, 1M, 5% (brn,blk, grn)
__ R18, 22 k, 5% (red,red,org)
__ R13, 10 k, 5% (brn, blk, org)
__ R2, 8.25k, 1% (gry,red,grn,brn,brn)
__ R1, 6.8k, 5% (blu,gry,red)
__ R3, 3.3k,5% (org,org,red)
__ R6, 8.25k, 1% (gry,red,grn,brn,brn)
__ R20, 47 k, 5% yel,vio, org)
__ R4, 100k, 5% (brn,blk,yel)

Install the mono ceramic capacitors listed below:
__ C7, .22µF (224) __ C5, .22µF (224) __ C3, .22µF (224) __ C1, .22µF( 224)

Install the poly capacitors listed below:
__ C6, .01µF (103) __ C8, .01µF (103) __ C2, .01µF (103) __ C4, .01µF (103)

Install the electrolytic capacitors listed below, Insert the long lead into the square pad.
__ C10, 22uF 25 V __C9, 22uF 25 V

Install the Red LED at D1. Insert the long lead into the square pad.

Install R19, a 10k (103) pot, on the left edge of the board as shown by its outline.

Install R21, a 10k (103) pot, on the left edge of the board as shown by its outline.

Install J1, the RCA connector, on the left edge of the board as shown by its outline.

Install switch S1, on the left edge of the board as shown by its outline.

Install the headers, JP1 and JP2 near the top and bottom edge of the board.

Install U1 and U2 in their indicated positions. Align the notch in the top of the package with the outline on the
printed circuit board.

Install Q1, Q2, Q3, and Q4 in their indicated positions. Align the flat side of the package with the outline on the
printed circuit board.

Install the jumper blocks on the pins marked “T” on JP1 and JP2.

Install the battery holder at BT1. Use 4-40 hardware

Install 4 mounting feet on the back side of the board as shown in the photo on page 7.