YAESU FT-227RA User guide

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y AESU MODEL FT -227RA

The FT-227RA is an adaptation of the FT-227R which provides expanded memory capability as well as scanning
capability. The scanner will search for a busy or clear channel, as desired, or will scan indefinitely until halted by
a press of the microphone PTT switch.

The foliowing changes in the FT -227R Instruction Manual should be observed. Apart from these changes, operation
is identical to that of the FT -227R.

1.

All references to "FT-227R" should read "FT-227RA".

2.

The microphone supplied with the FT -227RA contains up/down scanner cøntrols. The microphone plug and jack
in the FT -227RA contain 6 pins, compared to 4 pins for the FT -227R.

3.

The FT-227RA FUNCTION switch has memory positions M1, M2, M3, and M4, as shown. Also on the FUNCTION
switch are :!:600kHz repeater positions.

4

The bottom of the cabinet contains the HI/LOW RF output switch, as well as the BUSY-MAN-CLEAR scanning
select switch.

5.

Page 18, "PLL CONTROL SECTION", should have its first paragraph modified to read: "The optical coupling
system utilizes two photo-interruptors 02 and 03 (both ON-1105) to generate two signaloutputs which are
amplified by 04 and 05 (both 2SC1815Y) and applied to the PLL control unit.

The FT -227RA block diagram, schematic diagram, and parts list should be referred to for correct information.

6.

FT-227RA OPERATION

For scanner operation, proceed as foliows. Place the BUSY-MAN-CLEAR switch in the MAN position, and the MR
switch should be OFF. Pressing the UP button for an instant will cause a shift of 10kHz upwards. Holding the UP
button down for more than Y2 second will initiate scanning higher in frequency. Press the UP button once again to halt
the scan at the desired frequency.

Pressing the DN switch in the same manner will cause scanning toward a lower frequency.

Placing the scanning select switch in the BUSY position will cause the scan to be halted whenever the squelch is tripped

by a signal on the frequency being scanned. Placing the switch in the CLEAR position will cause the scan to be halted
when the receiver is muted (no signal present). When the optional tone squelch is used, the scan will be halted according
to the condition of the~squelch, not the tone squelch.

For memory operation, proceed as foliows. Memory channels M1 - M3 are for simplex operation only. With the MR
switch OF F, dial in the desired frequency, press M, and then the frequency will be store d in the channel selected by the
FUNCTION switch. For instant return to the simplex frequency, press MR.

Memory channel M4 can be used for repeater operation. Store the repeater UPLINK (input) frequency in channel M4,
then rota.te the dial to the repeater downlink frequency. With the M R switch OFF, you will now be transmitting on
the memorized frequency, and receiving on the dial frequency. Pressing the M R button puts you on the memorized
frequency for both transmit and receive.

The ::!:600kHz positions of the FUNCTION switch are used only for securing repeater offset onthe dial frequencies.

For selection of 10 watts or 1 watt of AF output, place the HI/LOW switch in the HI or LOW position, respectively

1

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DENMARK

MAIN UNIT
TRANSMITTER

SECTION

MAIN UNIT SECTION

-RECEIVER
RED WIRE MUST BE GUT

-WHEN TONE SQUELCH UNIT
IS INST ALLED.

TONE SQUELCH UNIT

--C WHEN INSTALLED)

TONE BURST

SECTION

--~-

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PLL CONTROL

UNIT

PLL CONTROL UNIT

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FT -227RA PARTS LIST

-

Symbol Number

05-7 Q4,5 .
Dl

D2 RESISTOR Q2,3 R2 Carbon film

RI "" ." 8200
R6 ~' " 5.6KO Rll,l Carbon film;-
R7 .i 1 , """ .

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TRANSISTOR

22402353 ~.;n~35

DIODE

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21090130
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RFSISTOR I ?QnQnmd

(1143100
41143821
41143562
42124220

Description

5ilicO!l 151555

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Zener' WZO50

C.r""" film

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CompositionMW GK 220

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Symbol Number

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Par'is-

Number

O18500AZ l-p\1oto interrupter IJOard-

Ull!:lUUJ\L I wlth Components

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22318154

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TRANSISTOR

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PHOTO INTERRUPTER

r;..rMn filmr;..rMn film

Description

2.c;~1a'5Y

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FT-227RA PARTS LIST

Symbol Number

PB-1893

'iji04".;'!"

Q701

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,

Q712

Q702.703..707~
Q708
Q709-711

Q705.706
Q713-715 '.-

707

D701-737

R714

R106.109
R101.119.728.729

R732.738.741.746 ,

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R701.716.717 !

R735

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R703.722

-

R702.705.730.731
R733.737.744
R708.710-713.723
R724.726.727.742

R720.734
R744 'o..

R704.718

;..

R715

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C704,713,722,724

C703,705,710

C714,715,720

-

C706-708,716,719
C721

C702
C723

C711,712,713

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C709,717

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Number .

018930AZ onents

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4\n518930 P.C. Board

IC . TRANSI STOR

25000114 IC MC14011B

25000113 + MC14013B

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25000178 ,; + MC14069B

25000093 +c,; MC14081B

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25000091 :' MC14510B

25000192 +' CD4039AE

22318154 ...C,..,c.. 2SCI815Y

21015550

40143472
40143682
40143103

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41143103
40143223
41143333

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I 40143104

41143104

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40143224

41143224
40143474
42144275

30820102
3082(1)03
36825102

36825103

36825223
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36526225
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MSM561 MC 140498

MC140088 MC145108
MC140288 MC145118
MC140428 MC145198

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Q308 (,uPD857C) PROGRAMMABLE mVIDER CODE

Q308 PROGRAMMABLE INPUT PIN-+

P IJ 305
p IJ304

FREQUENCY

!

00

144.

4.

01

4.

02

4.

03
04

4.

4.

05

4.

06

4.

07

4.

08
/)!j

4._-

144.10

4.11

4.12

4.13

4.14

4.15

4.16

4.17

4.18

4.19

144.20

4.30

4.40

4.50

4.60

4.70

4.80

4.90

145.00

145.01

145.02

145.03

145.04

145.05

145.06

145.07

145.08

145.09

145.10

145.20

145.30

145.40

145.50

145.60

145.70

145.80

145.90

146.00

147.00

147.99

mAL

DISPLA y

~

4.000

4.010

4.020

4.030

4.040

4.050

4.060

4.070

4.080

4.090

4.100

4.110

4.120

4.130

4.140

4.150

4.160

4.170

4.180

4.190

4.200

4.300

4.400

4.500

4.600

4.700

4.800

4.900

5.000

5.010

5.020

5.030

5.040

5.050

5.060

5.070

5.080

5.090

5.100

5.200

5.300

5.400

5.500

5.600

5.700

5.800

5.900

6.000

7.000

7.990

PROGRAMMABLE

-+

-+

IDIVmE~ RATIO

1/100

1/101
1/102
1/103
1/104
1/105

1/106
1/107
1/108
1/109
1/110
1/111
1/112
1/113
1/114

1/115

1/116

1/117
1/118
1/119
1/120
1/130
1/140
1/150
1/160
1/170
1/180
1/190
1/200
1/201
1/202
1/203
1/204
1/205
1/206
1/207
1/208

1/209
1/210
1/220
1/230
1/240
1/250
1/260
1/270
1/280
1/290
1/300

1/400
1/499

-

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1

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* 1 HIGH LEVEL (5V)
* D LOW LEVEL (DV)

36

ADDENDUM TO FT-227R INSTRUCTION MANUAL

Th.is transceiver has been mod.if.ied .in arder to make the tone

access feature for repeater operation more convenient for
repeater operation .in your area. The follow.ing changes is
operat.ion of your unit should be noted.

l. The TONE SO feature has been eliminated.

2. The TONE BURST feature has been changed. The necessary tone
for accessing repeaters is now provided through the front

panel CALL button. pressing this button activates the

transce.iver PTT relay and transmits a tone of 1750 Hz for

as long as the button is depressed.

3. The rear panel BURST ON-OFF switch has been removed. The
CALL feature is always in operation.

4. As in the or,iginal model, the audio frequency of the tone

may be adjusted by varying VR207.

455kHz

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