manualshive.com logo in svg

HAMTRONICS TD-3, Quick Start Manual, Page: 4 / 5

Share
Download
HAMTRONICS TD-3 Quick Start Manual Download Page 4

©1994 Hamtronics, Inc.; Hilton NY; USA.  All rights reserved.  Hamtronics is a registered trademark.    Revised: 1/31/00

- Page 4 -

C3-C4

.033 uF mylar

C5

.01 uF monolithic (103)

C6

2.2 uF electrolytic

C7

10 uF electrolytic

C8

47 uF electrolytic

C9-C14

0.15 uF polyester

C15

2.2 uF electrolytic

CR1

1N4148

Q1-Q3

2N3904 or 2N4124

R1-R3

47K

R4

20K or 22K pot (203, 223,
  or 22K)

R5

27K

R6

5K, 20-turn pot

R7

10K in series with 2.2K
  (frequency dependent,
  see text)

R8-R10

27K

R11

20K pot

R12

3.3K

R13

10K

U1

78L08 8Vdc regulator

U2

NE567P PLL Tone De-
    tector

Summary of Contents for TD-3

Page 1: ...a transmitter when required Some of the square wave audio tone signal from the phase lock oscillator in U2 is low pass filtered by R8 C13 and R9 C14 to provide a quasi sinewave tone signal This is am...

Page 2: ...T CIRCUIT Output terminal E2 is connected to the receiver circuit being switched Normally the unit is used to inhibit the repeater by grounding the COS signal from the receiver to the COR board in the...

Page 3: ...heck for response of the TD 3 is to monitor the COS voltage at the feedthrough cap on the receiver enclosure Since the response bandwidth range of tone frequencies which will be detected is proportion...

Page 4: ...2 uF electrolytic C7 10 uF electrolytic C8 47 uF electrolytic C9 C14 0 15 uF polyester C15 2 2 uF electrolytic CR1 1N4148 Q1 Q3 2N3904 or 2N4124 R1 R3 47K R4 20K or 22K pot 203 223 or 22K R5 27K R6 5...

Page 5: ...1994 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 1 31 00 Page 5...

Reviews:

No comments