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A144-20T

Reddi-Match should be

pointed up and away

from mast!

Center mast 

between elements 

V4 and V5.

6

cushcraft

COAT WITH SILICONE GREASE

(DO NOT coat the center pin or socket!)

cushcraft

Mount the antenna to your mast using the mounting plate (70) and
the hardware provided per figure E.  Refer to figure F for the mount-
ing point.  Tighten the U-bolts taking care not to crush the boom.
See "MOUNTING" on page 1 concerning orientation of mast mount,
elements and Reddi-Match.

#3  - MAST MOUNT

KEY        P/N                     DISPLAY                         DESC                    SIZE               QTY

45

321045

ALUMINUM

1/2" x 1/2"

4

SPACER

(1.3 x 1.3 cm)

70

190070

FORMED

4" x 6"

1

MAST PLATE

(10.1 x 15.2 cm)

84

010084

SS LOCK

1/4"

4

WASHER

(.63 cm)

85

010085

SS HEX

1/4"

4

NUT

(.63 cm)

104

010104

SS FLAT

1/4"

4

WASHER

(.63 cm)

118

010118

SS HEX

5/16"

4

NUT

(.8 cm)

119

010119

SS LOCK

5/16"

4

WASHER

(.8 cm)

326

290326

DANGER

1

LABEL

401

010401

SS

3" x 1-3/4"

2

U-BOLT

(7.6 x 4.4 cm)

404

010404

SS

3-1/4" x 2-7/16"

2

U-BOLT

(8.3 x 6.2 cm)

FIGURE E

115

050115

CONN

2

BOOT

116

240116

SILICONE

2

PACKAGE

KEY        P/N                     DISPLAY                         DESC                         SIZE                  QTY

SILICONE GREASE

cushcraft

#4 - FEEDLINE

This antenna is designed for use
with 50 Ohm coaxial cable termi-

nated with a PL-259 connector.
Any length of feedline can be
used with your A144-20T.  The

shortest length of cable will have

the least loss.  Two connector boots are

included for use with your new antenna.  Slide the

boot over the cable before attaching your PL-259 (figure

F).  Spread silicone on the outer threads of the Reddi-Match and

PL-259 connector.  DO NOT COAT THE CENTER PINS OF THE PL-

259.  Attach the connector to the Reddi-Match.  Apply the remaining silicone

to the outside of the connector.  Slip the vinyl boot over the connector and
against the mast bracket for a weather tight connection.  Use electrical tape to
secure coax to boom and mast as shown in Figure F.

MAST

85

104

404

401

401

70

326

BA

84

45

118

119

118

119

BOOM

FIGURE F

Summary of Contents for A144-20T

Page 1: ...951452 5 97 C O R P O R A T I O N ASSEMBLY AND INSTALLATION A144 20T 2 METER TWIST YAGI ANTENNA 144 148 MHz Downloaded by RadioAmateur EU ...

Page 2: ... will provide the best service and longest life Often it is desirable to mount several antennas ononemast Tokeeppossibleinteractiontominimum placeyourantennasasfarapartasyoucan TheA144 20Ttransmitsandreceiveshorizontal and vertical polarization Vertical polarization is normally for FM and packet while horizontal polarization is normally for SSB and CW SYSTEM GROUNDING Direct grounding of the anten...

Page 3: ...m white plastic cap 2 326 290326 Danger label 1 401 010401 3 x 1 3 4 7 6 x 4 4 cm stainless steel U bolt 2 2 MASTER PARTS LIST KEY PART DESCRIPTION QUANTITY KEY PART DESCRIPTION QUANTITY 404 010404 3 1 4 x 2 7 16 8 3 x 6 2 cm stainless steel U bolt 2 410 030410 1 2 5 cm stainless steel worm clamp 2 921 200921 Reddi Match clamp 4 941 360941 8 aluminum flat washer 4 BA 1 x 48 2 5 x 122 cm aluminum t...

Page 4: ...rd the center of the boom Assemble the Reddi Match components RR PT RT and 251 Set them aside for the moment Loosely attach the Reddi Match straps 921 to the driven elements H2 V2 as shown Slide the Reddi Match assembly through the Reddi Match straps and secure the rod RR to the connector Use washer 41 and nut 11 Next slide the poly tube PT to the flattened end of the rod Figure C 2 Set the dimens...

Page 5: ... and tighten the worm clamps Push the end caps 61 onto the ends of the boom KEY P N DISPLAY DESC SIZE QTY FIGURE B 6 5 16 16 cm 1 7 16 3 65 cm 12 11 16 32 2 cm 17 13 16 45 2 cm BA BC BA BB BC 410 61 410 61 12 7 16 31 6 cm 1 7 16 3 65 cm BB 11 27 9 cm Make a mark here Make a mark here 5 12 7 cm 20 3 8 51 75 cm 15 1 8 38 42 cm 132 335 3 cm FRONT BACK FIGURE A 15 38 1 cm 16 3 8 41 6 cm FRONT BACK Vie...

Page 6: ...1 010401 SS 3 x 1 3 4 2 U BOLT 7 6 x 4 4 cm 404 010404 SS 3 1 4 x 2 7 16 2 U BOLT 8 3 x 6 2 cm FIGURE E 115 050115 CONN 2 BOOT 116 240116 SILICONE 2 PACKAGE KEY P N DISPLAY DESC SIZE QTY SILICONE GREASE cushcraft 4 FEEDLINE This antenna is designed for use with 50 Ohm coaxial cable termi nated with a PL 259 connector Any length of feedline can be used with your A144 20T The shortest length of cabl...

Page 7: ...clusions or limitations of incidental or consequential damages so the above limitation and exclusion may not apply to you This warranty gives you specific legal rights and you mayalsohaveotherrightswhichvaryfromstatetostate This warrantydoesnotextendtoanyproductswhichhavebeensubjecttomisuse neglect accidentorimproper installation Any repairs or alterations outside of the Cushcraft factory will nul...

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