HAMTRONICS HS Owner's manual

HAMTRONICS
Brand
HAMTRONICS
Model
HS
Type
Owner's manual

HAMTRONICS HS is a versatile device that allows you to modify your TA51 and TA451 transmitters for 9600 baud data operation with the MO-96 modem. With this device, you can enjoy the following benefits:

  • High-speed data transmission: Transmit data at speeds of up to 9600 baud, enabling efficient and reliable communication.
  • Packet radio networking: Utilize the MO-96 modem for packet radio networking, allowing you to connect with other devices and participate in data exchanges.
  • Frequency modulation (FSK): Modulate your transmitted data using FSK, ensuring clear and robust signal transmission.

HAMTRONICS HS is a versatile device that allows you to modify your TA51 and TA451 transmitters for 9600 baud data operation with the MO-96 modem. With this device, you can enjoy the following benefits:

  • High-speed data transmission: Transmit data at speeds of up to 9600 baud, enabling efficient and reliable communication.
  • Packet radio networking: Utilize the MO-96 modem for packet radio networking, allowing you to connect with other devices and participate in data exchanges.
  • Frequency modulation (FSK): Modulate your transmitted data using FSK, ensuring clear and robust signal transmission.
©1994 Hamtronics, Inc.; Hilton NY; USA. All ri
g
hts reserved. Hamtronics is a re
g
istered trademark. Revised: 3/12/03 - Pa
g
e 1 -
GENERAL INFORMATION.
This sheet provides information on
modifications to the vhf and uhf
transmitters for use with the MO-96
Packet Radio Networking Modem for
9600 baud fsk data transmission. It
is intended to give specific information
on parts changes and alignment de-
tails peculiar to these versions of the
transmitter, and it should be used
along with information in the regular
manuals for the transmitter and re-
ceiver. General system information,
interconnections, etc. are contained in
the MO-96 manual along with infor-
mation on construction and alignment
of the M0-96 unit.
PARTS INCLUDED.
1 each:
1 uF electrolytic capacitor
MV2111 varicap diode
6.8K resistor
47K resistor
TA-451 TRANSMITTER
MODIFICATIONS.
If you are building a kit, please
mark the parts list with the following
changes before beginning construc-
tion and use the attached parts loca-
tion view in place of the one which
comes with the kit. If you ordered a
wired unit, these changes have al-
ready been made.
a. Remove C12, and C13 from the
standard unit, and replace C12 with
varicap diode MV2111, orienting with
anode to ground. (If you have any
trouble reading the diode symbol, use
an ohmmeter to determine polarity.)
b. Solder one lead of a 47K resistor
to one "hot" pad normally used by
C13. Leave the other end free and
trim it to about 1/4 inch to allow a
wire to be soldered to it as a connec-
tion from the MO-96 or other source
of data used to modulate the trans-
mitter.
c. Change value of C60 (TA51) or
C18 (TA451) to 1 uF. Observe polarity.
d. Remove R23 (TA51) or R17
(TA451) to break the normal audio
path to the modulator.
e. Remove C21 (TA51) or C23
(TA451). It is not used.
f. If voice audio will not be used,
set deviation pot fully counterclock-
wise. This is R20 (TA51) or R15
(TA451).
ALIGNMENT.
Refer to the manuals for the exciter
and the MO-96 Modem for proper
alignment procedures. It is impor-
tant, if you align the units without
connecting to the modem, that proper
bias voltage must be applied to the
varicap diode circuits in the exciter or
off-frequency operation will result.
For simple testing purposes, a +4Vdc
bias can be connected until final fre-
quency alignment is required.
HAMTRONICS
®
KIT TO MODIFY TA51 & TA451
FOR 9600 BAUD DATA OPERATION WITH MO-96 MODEM
  • Page 1 1

HAMTRONICS HS Owner's manual

HAMTRONICS
Brand
HAMTRONICS
Model
HS
Type
Owner's manual

HAMTRONICS HS is a versatile device that allows you to modify your TA51 and TA451 transmitters for 9600 baud data operation with the MO-96 modem. With this device, you can enjoy the following benefits:

  • High-speed data transmission: Transmit data at speeds of up to 9600 baud, enabling efficient and reliable communication.
  • Packet radio networking: Utilize the MO-96 modem for packet radio networking, allowing you to connect with other devices and participate in data exchanges.
  • Frequency modulation (FSK): Modulate your transmitted data using FSK, ensuring clear and robust signal transmission.
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