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Automatic 6-Band
Bandpass Filter
DXE-419
DXE-419-INS Revision 3
© DX Engineering 2020
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200
Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com
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Introduction
The DXE-419 Automatic 6-Band Bandpass Filter is designed to interface between your transceiver and
amplifier or antenna and provide bandpass specific filtering. This automatic filter uses discrete inputs from a
band decoder to switch in the proper band pass filter for the band you have selected. The unit is capable of
handling 100 watts (under 2:1 SWR) on 160, 80, 40, 20 15 and 10 meters. The DXE-419 is in by-pass mode
with no DC connected, or with the DC power connected but not turned on. Band selection can be automated
with the use of a band decoder.
Features
Power handling 100 watts with a 2:1 or better SWR
Typical insertion loss is less than 0.5 dB
Soft touch front panel push button controls
LED indicators show DC power status and band selection
Band selection can be Automatic or Manual
DB-9 Connection on rear panel for external band decoder input
DC power off provides a by-pass mode for the unit
2.1 mm power input jack requires +13.8 VDC, 300 ma (min).
SO-239 connectors for connection to radio and amplifier/antenna
Heavy duty chassis construction with rubber feet
8-14” High x 6-5/8” Wide x 10-1/4” Depth
Front Panel
PWR When DC power is connected to the rear of the unit,
but the unit is not turned on, the PWR LED will be
RED and the unit is in bypass mode. If the unit is
turned off, or if the DC power to the unit is removed,
the unit will also be in bypass mode.
When the PWR button is pushed once, the PWR LED
will change from RED to GREEN.
MANU Pressing the MANU button will switch the unit into
Manual Mode. MANU Led will light up RED. Filter
selection is determined by which BAND switch is
pressed. The selected BAND LED will light up RED.
AUTO Pressing the AUTO button will switch the unit into
the Automatic Mode to be used with an external band
decoder inputs. Auto LED will light up RED. The bandpass filter will be selected by the
customer’s external band decoder input signal to the unit via the DB-9 input on the rear of the unit.
BAND 160, 80, 40, 20, 15, 10
In AUTO mode, the external band decoder will select a band and that band’s LED will light up
In Manual Mode, pressing one of the six BAND buttons will cause that button’s RED LED to turn
RED.
on indicating the band that has been selected.
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Rear Panel Connections
Parameter
Insertion
Loss
SWR
Out of Band Attenuation (typical)
Bypass
<0.1 dB
<1.3
160
80
40
20
15
10
160 m
<0.4 dB
<1.3
50 dB
90 dB
65 dB
56 dB
65 dB
80 m
<0.4 dB
<1.3
41 dB
51 dB
63 dB
71 dB
60 dB
40 m
<0.4 dB
<1.3
66 dB
45 dB
90 dB
58 dB
51 dB
20 m
<0.4 dB
<1.3
52 dB
48 dB
70 dB
65 dB
63 dB
15 m
<0.5 dB
<1.3
49 dB
43 dB
38 dB
40 dB
64 dB
10 m
<0.4 dB
<1.3
58 dB
46 dB
36 dB
62 dB
40 dB
Pin
Band Decoder minus trigger signal
1
160 meters selected
2
80 meters selected
3
40 meters selected
4
20 meters selected
5
15 meters selected
6
10 meters selected
7
+12 VDC from Band Decoder
8
No Connection
DB-9 Connector on rear of unit
9
No Connection
RADIO SO-239 connector to connect to the transceiver’s RF
AMP/ANT SO-239 connector to connect to the user’s Amplifier or
DC 13.8 V 2.1 mm Socket to connect +13.8 VDC, 300 ma. Center
BAND IN DB-9 Cable connection for band selection input from
Caution:
Do Not reverse the input power polarity and use less than +14 VDC input power
BAND IN requires negative 11 to 14 VDC at least 20 ma
Do NOT use this filter for a linear amplifier
Insertion Loss and Out of Band Attenuation
output
Antenna
is + input
user’s band decoder
BAND IN - DB-9 Connections
The following diagram shows the DB-9 connector as viewed on the rear of the DXE-419. Wiring from the
DXE-419 to the customer’s band decoder must follow the wiring scheme shown below.
The DXE-419 is looking for a minus trigger signal from a band decoder on the pin that corresponds to the
band being selected. Refer to your band decoder’s instruction manual for details and proper wiring of the
band decoded signals. Improper wiring or incorrect signal levels may cause damage to the transceiver,
amplifier or the DXE-419 unit which is not covered by warranty.
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Specifications:
Band
160
80
40
20
15
10
Max power/PEP
100W
100W
100W
100W
100W
100W
Max VSWR
2.0:1
2.0:1
2.0:1
2.0:1
2.0:1
2.0:1
In band SWR
≤1.3
≤1.3
≤1.3
≤1.3
≤1.3
≤1.3
Insert loss
-0.4dB
-0.4dB
-0.5dB
-0.5dB
-0.5dB
-0.4dB
Bands Covered
1.800 to 2.000 MHZ 3.500 to 3.900 MHz 7.000 to 7.300 MHz
14.000 to 14.350 MHz 21.000 to 21.450 MHz 28.000 to 28.8 MHz
Manual Updates
Every effort is made to supply the latest manual revision with each product. Occasionally a manual will be updated between the time
your DX Engineering product is shipped and when you receive it. Please check the DX Engineering web site
(www.dxengineering.com) for the latest revision manual.
Technical Support
If you have questions about this product, or if you experience difficulties during the installation, contact DX Engineering at (330)
572-3200. You can also e-mail us at: DXEngineering@DXEngineering.com For best service, please take a few minutes to
review this manual before you call.
Warranty
All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from
date of shipment. DX Engineering’s sole obligation under these warranties shall be to issue credit, repair or replace any item or par t thereof which is
proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or
any other work, unless such charges are authorized in advance by DX Engineering. If DX Engineering’s products are claimed to be defective in
material or workmanship, DX Engineering shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportationcharges prepaid by Buyer). Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing. The above
warranties shall not extend to any products or parts thereof which have been subjected to any misuse or neglect, damaged by accident, rendered
defective by reason of improper installation, damaged from severe weather including floods, or abnormal environmental conditions such as prolonged
exposure to corrosives or power surges, or by the performance of repairs or alterations outside of our plant, and shall not apply to any goods or parts
thereof furnished by Buyer or acquired from others at Buyer’s specifications. In addition, DX Engineering’s warranties do not extend to other
equipment and parts manufactured by others except to the extent of the original manufacturer’s warranty to DX Engineering. The obligations under
the foregoing warranties are limited to the precise terms thereof. These warranties provide exclusive remedies, expressly in lieu of all other remedies
including claims for special or consequential damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY
WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND
FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR DX ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICTLY
IN ACCORDANCE WITH THE FOREGOING.
©DX Engineering 2020
DX Engineering®, DXE®, DX Engineering, Inc.®, Hot Rodz®, Maxi-Core®, DX Engineering THUNDERBOLT®, DX Engineering Yagi Mechanical®,
EZ-BUILD®, TELREX®, Gorilla Grip® Stainless Steel Boom Clamps, Butternut®, SkyHawk™, SkyLark™, SecureMount™, OMNI-TILT™, RFPRO-1B®, AFHD-4® are trademarks of PDS Electronics, Inc. No license to use or reproduce any of these trademarks or other trademarks is given or
implied. All other brands and product names are the trademarks of their respective owners.
Specifications subject to change without notice.
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