Elecraft 2T-Gen - Manual

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L E C R A F T
2T-gen 2-Tone
T E S T O S C I L L A T O R
R e v B , M a r c h 1 0 , 2 0 1 0
Introduction
The Elecraft 2T-gen is a 2-Tone test oscillator that can be used to make distortion measurements on SSB
transmitters and amplifiers. The 2T-gen is battery operated and provides sufficient output level to be
connected directly to the microphone connector of almost any transceiver.
Specifications
AF Output Level
200 mV max, adjustable, female RCA connector
Frequency 700 Hz and 1900 Hz
Harmonic Distortion -55 dB typical
Current Drain
About 3mA from on-board 9-V battery
Size PC board: 3.5"L x 2.4"W; 1.0"H
Parts Inventory
R2,R6
(2) Res, 8.25 k 1% (gry, red, grn, brn, brn), E500176
R3,R9 (2) Res, 3.3k 5% (org,org,red), E500017
R5,R11 (2) Res, 1M 5% (brn,blk,grn), E500024
R4,R10 (2) Res, 100k 5% (brn,blk,yel), E500006
R1, R7 (2) Res, 6.8k 5% (blu,gray,red), E500115
R8,R12 (2) Res, 22.6k 1% ( red, red, blu, red, brn), E500175
R13, R14 (2) Res, 10 k 5% (brn, blk, org), E500015
R15,R16,R17,R18 (4) Res, 22K 5%, (red,red,org), E500090
R20 (1) Res., 47K 5% (yel,vio,org), E500067
C1, C3,C5,C7 (4) Mono Cap, 0.22uF (224), E530079
C2,C4,C6,C8 (4) Poly Cap, 0.01UF (103), E530009
C9, C10 (2) Electrolytic Cap, 22 µF E530143
D1 (1) Red LED, round, E570025
R19,R21 (2) 10k Pot, E520005
S1 (1) Miniature slide switch, E640009
JP1, JP2 (2) 3-pin header, E620053
J1 (1) RCA Connector, E620057
U1, U2 (2) LMC6842AIN, E600011
Q1,Q3 (2) Transistor, 2N3904, E580017
Q2,Q4 (2) Transistor, 2N7000, E580002 (1) 2T-gen Printed Circuit Board, E100256
(4) Self-adhesive mounting feet, E700024
(2) 2-pin jumper block, E620055
(2) 4-40x5/16 machine screws, E700077
(2) #4 internal tooth lockwashers, E700010
(2) 4-40 machine nuts, E700011
(1) Battery Holder, E980074