Lafayette hb 525 e owners manual

Page 1

SPECIFICATIONS

RECEIVER

CIRCUIT TYPE ...................... Dual conversion superheterodynea Crystal frequency
synthesizer provides 23 crystal controlled transmit
and receive channels. Delta tuning of :2 KHz on
each channel plus mechanical filter.

SENSITIVITY ......................... 0.5;1V for 10 db S/N to N ratio at 30% at 1000 Hz
modulation.

SELECTIVITY ......................... 6 db down at t2.5 KHZ: 45 db down at :8 KHZ.

INTERMEDIATE FREQUENCY ............. lst IF: 11275 MHz. 2nd IF: 455 KHz.

AUDIO OUTPUT ....................... 2,7 watts into ext. spkr. jack

AUXILIARY CIRCUITS .................. Series gate noise limiter. Variable squelch, PA. EX.,

S/P-RF meter.
TRANSMITTER

FINAL STAGE D.C POWER INPUT .......... 5 watts maximum.

RANGE BOOST ........................ Yields high average modulation at average voice
levels.

CARRIER DEVIATION ................... Exceeds FCC requirements.

HARMONICS SUPPRESSION ............... Exceeds FCC requirements.

ANTENNA MATCHING .................. Nominal 500 (may be used with 30-1009 antennas).

SEMI-CONDUCTORS

TRANSISTORS ........................ TRI~TR3: ZSCFII Silicon Planar
TR4~TR6z 25CF5 Silicon Planar
TR7: 2SCF6 Epitaxial Silicon Planar
TRS: ZSCFS Epitaxial Silicon Planar
TR9: ZSCFZ Silicon Planar
TR10~TR13, 17: 2SCFII Silicon Planar
TRI4: ZSBFl Germanium
TRIS: ZSDFI Germanium
TR16: ZSBFIA Germanium
TRIS, 19: ZSBFS Germanium

DIODES ............................. DI: 151555 Silicon
D2-D5, 7, 8, 10: 1334 Germanium
D6: RD-9A Zener
D9: VO~6C Silicon

GENERAL

POWER SUPPLY ...................... 12.6 volts DC, negative or positive ground

(with internal switching).

ACCESSORIES ......................... l) Push-to-talk dynamic microphone.
2) DC power cable (1.5 amp fused).
3) Mobile mounting bracket.

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Page 2

GENERAL INSTRUCTIONS

The Lafayette HB-525 E Transceiver is a combination transmitter and receiver designed for use in
Class D" operation in the 27 MHZ Citizens Radio service. It is designed to meet the Federal
Communications Commission requirements applicable to equipment operating in this service
under class D emission, and not to be used for any other purpose. Part 95 of the FCC
regulations defines operation in this service and the licensee is required to read and understand
these regulations prior to operating a CB transmitter. Copies of Manual VI (covering the FCC
regulations for the Citizens Band Radio Service) includes Part 95 and are available for $1.25 from
the Superintendent of Documents, U. S Government Printing Office, Washington, D. C. A
station license may be obtained by submitting a properly completed Station License Application,
Form 505, as directed.

It is illegal to operate the transmitter section of this transceiver prior to receiving a valid station
license and call sign. A properly completed Identification Card FCC Form 452-C must be
attached to the transmitter.

The unit will provide economical and reliable two-way radio communication in its intended
application if installed and operated in accordance with instructions contained herein.

GENERAL DESCRIPTION

The HB-525E is an extremely compact all-transistor 2-way radio providing 23 crystaLcontrolled
transmit and receive channels in the 27 MHz Citizens Band.

Designed and built for reliable, trouble-free performance, the HB-525 E uses rugged, heat-resistant
transistors in all critical areas. Current drain on 12 volts DC is exceptionally low, permitting
continuous mobile operation for long periods of time. . . even with the automobiles motor
switched off.

The HB-525E is designed to operate from 12 volt DC (positive or negative ground), but may also
be operated from 105-120 volts 50/60 Hz AC when used with the optional solid-state AC power
supply unit Model HB-502. The transceiver may also be operated from a 6 volt DC source when
used with the optional DC converter unit, Model HB-SOS.

RECEIVER

The receiver is a highly sensitive and selective double-conversion superheterodyne incorporating a
high-quality Mechanical Filter in the 455 KHz IF section for high adjacent channel rejection, The
receiver may be operated on any channel in the Citizens Band by means ofa front panel selector
switch. A squelch control is incorporated which can be used to quiet the receiver when no
signal is being received and, being variable, can be adjusted for varying degrees of sensitivity to
signals. Also included is a fullAtime Automatic Noise Limiter which materially reduces ignition
noise and other undesirable noise interference, and an S/P-RF meter for indicating strength of
received signal (s).

The internal audio stage amplifier and speaker may be used for AUX operation in conjunction
with an external source through the EX jack.