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Elecraft 2T-Gen User Manual

2t-gen 2-tone, Introduction, Specifications

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1

E

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