TWO METER
AMATEUR TRANSCEIVER

MODEL HR- 2A
INSTRUCTION MANUAL

UNPACKING

1 – Transceiver Unit
1-DC Power Cord
1 – Mobile Mounting Bracket
1 – Security Bracket
I – Instruction Manual
1 – Warranty Card
To be filled out and returned to:
Regency Electronics, Inc.
7900 Pendleton Pike
Indianapolis, Indiana 46226
MAINTENANCE
It is recommended that the services of a qualified electronic technician be used for troubleshooting.
2. A mobile mounting bracket for easy installation in a car or truck.
3. A plug-in high impedance microphone with a right angle connector .

SPE CIFICA TIO NS

RECEIVER
Frequency Range…………………….. 144-148 MHz
Sensitivity. . . . . . . . .  . .  0.35v (nom.) 20 DB Quieting
Selectivity ……………….. 6 DB Down ±16 KHz 50 DB Down ± 32 KHz
Image Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 DB
Spurious Rejections. . . . . . .  . . . . . . . . . .  . . . . . .. 60 DB
Modulation Acceptance. . . . . . . .  . . . ± 15 KHz
Audio Output (3-40 Speaker)…….. 3 Watts 10% Distortion 5 Watts Maximum
Squelch System. . . . . . . . All Electronic Noise Compensated Channels. . . . . . . . . . . . 6 Crystal Controlled with provision for adding an additional 6 channels
I. F. Frequencies .••…•………… 10. 7 MHz & 455 KHz
TRANSMITTER
Frequency Range…………………….. 144-148 MHz
Power Output ….•…•……. 15 Watts (min.) @ 13. 6 voe
Power Bandwidth ………..•.. 15 Watts from 144-148 MHz
Harmonic and Spurious Emissions ……• 55 DB, or more, below carrier
Modulation. • • • • • . • • • • • • . . . • • . • • • • Phase Modulation with automatic deviation limiting
Deviation .•………..•. Automatic Limiting with internal adjustments from 0-15 KHz deviation
Mike Pre-Amp FET Input with internal level control
Microphone Plug-in hand held, high Z Ceramic supplied
Channels. . . . . . . . . . . . . 6 Crystal controlled with individual trimmer capacitors for Frequency netting
Power Amp Protection…… SWR Bridge Limiting Circuits
POWER
Power Requirements……………..13 .6 Volts (nominal)
Receive (Squelched) 180 MA.
Receive (Max. audio output) 800 MA.
Transmit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 9 Amps (max.)
Fuse Size…………. . . . . . . . . . . . . . . . . . . . . 4 Amp. 3AG
SEMICONDUCTORS
Integrated Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Silicon Transistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Silicon BET Power Transistors…………………… 2
Zener Diodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Varicap Diodes 2
Signal Diodes. . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Field Effect Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION

Mobile 12 VOC Installation
The HR-2 transceiver may be used in any car, truck, boat, etc. that has a 12 VOC negative ground system. The red lead with the fuse holder must be connected to the posi­ tive terminal side of the battery. The black lead should be connected to the chassis or negative terminal of the battery.
For a quick and easier mobile installation, an accessory 12 VDC power cord with a cigarette lighter plug (Regency MA -0) can be used. In this case, the unit can be operated
on the front seat of the vehicle.
A “mobile” antenna with a UHF (PL-259) plug on the coax cable is required for good two-way communications.

OPERATION

Volume Control/Off-On Switch
This control varies the audio output level for the inter ­ nal speaker. It also varies the level of audio present at the external speaker connection. Clockwise rotation of this con­trol turns the receiver on and increases the volume.
Squelch Control
This control eliminates background noise in the ab­ sence of a signal. Full clockwise rotation removes all squelch action. Turning this control counter -clockwise un – til the noise disappears permits the receiver to be “quiet” until an actual signal is received. Even if the squelch con ­ trol is set fully counter -clockwise, the receiver will still operate properly and not be locked-out or prevented from receiving a signal.
Channel Selector
This is bascially a twelve -position switch which en­ ables the operator to select any one of twelve crystal -con­ trolled transmit-receive channels. However, only the first six positions, numbered 1 through 6, are factory wired for typical simplex or paired frequency operation. For exam­ ple, channel l connects receive crystal No. 1 and transmit crystal No. 1 to their respective oscillator circuits. The last six positions, lettered A through F, are not factory wired. However, by adding jumpers to appropriate points on the switch decks, See Figures I & II, Page 12, these six positions can provide the operator with the capa ­ bility of reusing the first six crystal pairs in a different paired arrangement. For example, receive crystal No. l could be paired with transmit crystal No. 2 when the switch is on channel A. In other words, position A through F pro­ vide the operator with the necessary flexibility to keep the number of required crystals to a minimum.
Crystal Specifications
Due to the numerous frequencies or channels involved, only one pair of crystals are installed by the factory. Min­ ature, plug-in crystals are simply installed by inserting them in the receptacles on the circuit board. Because of the accuracy required, Shepherd Industries’ crystals are recom­ mended. They are usually available at the source from which the radio was purchased. Specify exact frequency. If desired, the crystals may be purchased from other manufacturers. The following information must be included in the order .
Receive Crystal:

1. 2. Frequency tolerance of .001%
2. 3rd overtone
3. Series resonance — 250 Hz
4. Maximum equivalent series resisance: 35 Ohms
5. Drive level: 2 MW
6. Holder: HC-25/U

Transmit Crystal:

1. **

**

2. Fundamental mode
3. Load capacity: 32 PF
4. Maximum series resistance: 40 Ohms
5. Drive level: 2 MW
6. Holder: HC-25/U 0
7. Frequency tolerance: At 25 C, .001% 0
   From -10 + 60C, .0015%
   

Crystal Installation:
Prior to installing a crystal, the transceiver’s cover should be removed. To remove the cover, unscrew the two large bolts located at the sides of the unit. The cover may tlten be slipped off by sliding it toward the rear of the unit. Next, the speaker should be removed. Unscrew the two small metal screws (one located on each side) holding the speaker brackets in place. Then carefully place the speaker assembly along side of the unit.
Insert the crystal, or crystals, in the proper socket pins as indicated on the crystal location drawing. (See page 11). The number by each pair of sockets matches the dial and channel block designation. For each transmit crystal, there is a variable capacitor that can be used for adjusting each transmit crystal to the exact frequency. This adjust ­ ment should be made with a frequency counter or by utiliz­ ing a receiver which is known to be “on frequency”.
The channel, or frequency, blocks on the front panel will accept 1/4″ wide embossing tape with up to 7 digits, letters, or other characters. These blocks can be used for identifying the channel frequencies installed in the unit. Reinstall the speaker and carefully reinstall the cover. The unit is shipped from the factory with the transmit and receive crystals for 146. 94 MHz installed in position One.
ILLUSTRATION #1

An example of typical transmit-receive combinations, utilizing the minimum number of crystals, will be demon­ strated. Suppose the following TRANSMIT -RECEIVE combina tions are to be set up in the HR-2.

CHANNEL SELECTOR POSITION NUMBER| TRANSMIT FREQUENCY
(MHz)| RECEIVE FREQUENCY (MHz)
---|---|---
l| 146. 94| 146. 94
2| 146.16| 146. 76
3| 146.22| 146. 82
4| 146. 28| 146.88
5| 146. 34| 146. 76
6| 146.46| 146.88
A| 146 .28| 146. 76
B| 146 .28| 146. 94
C| 146 .34| 146.82
D| 146. 34| 146. 88
E| 146. 34| 146. 94
F| 146.46| 146.94

Install the following proper transmit and receive crys­ tals in the appropriate crystal positions. See the crystal location and adjustment diagram, Page 11.

TRANSMIT CRYSTAL
146.94
146.16
146. 22
146 .28
146 .34
146.46| INITIAL POSITION
l
2
3
4
5
6| RECEIVE CRYSTAL
146. 94
146. 76
146. 82
146.88| INITIAL POSITION
l
2
3
4
---|---|---|---
TRANSMIT
CRYSTAL
146.94
146.16
146.22
146 .28
146. 34
146 .46| TOTAL
POSITIONS
l
2
3
4-A – B
5-C-D-E
6 – F| RECEIVE
CRYSTAL
146.94
146. 76
146.82
146.88| TOTAL
POSITIONS
1-B-E -F
2-5-A
3-C
4 -6 -D
---|---|---|---

This illustration is shown to demonstrate the extreme versatility incorporated in your HR-2. With the example shown, your HR-2 would be capable of working more than 250 of the single band repeaters as listed in a recently pub­ lished directory. Only 3 additional Receive crystals and 5 Transmit crystals are required plus, of course, the neces­ sary jumpers to reuse the crystals as indicated.
NOTE: Adding a jumper or jumpers, will slightly lower the transmit crystal frequency. Adjust the associated trimmer capacitor on the transmitter board for correction. Connect the following jumpers on the copper side of the receive switch deck #500-753 as illustrated in Figure I, Page 12. Insulated 22 or 24 gauge wire should be used to avoid shorts.

Position 1 to Position F
Position F to Position E
Position E to Position B
Position 2 to Position 5
Position 2 to Position A
Position 3 to Position C
Position 4 to Position 6
Position 6 to Position D

Connect the following jumpers on the copper side of the transmit switch deck

500-83l as illustrated in Figure II, Page 12.

Position 4 to Position A
Position A to Position B
Position 5 to Position D
Position D to Position C
Position D to Position E
Position 6 to Position F

SIDE VIEW SHOWING SECURITY BRACKET INSTALL A TION
CRYSTAL LOCATION AND ADJUSTMENT DIAGRAM

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