BIRD TERMALINE 8135 User manual

Termaline®Coaxial
Load Resistor
Operation Manual
Model 8135
©Copyright 2016 by Bird Electronic Corporation
Instruction Book Part Number 920-8135 Rev. D
Termaline is a trademark of Bird Electronic Corporation

i
Safety Precautions
The following are general safety precautions that are not necessarily related to
any specific part or procedure, and do not necessarily appear elsewhere in this
publication. These precautions must be thoroughly understood and apply to all
phases of operation and maintenance.
WARNING
Keep Away From Live Circuits
Operating Personnel must at all times observe general safety precautions. Do
not replace components or make adjustments to the inside of the test
equipment with the high voltage supply turned on. To avoid casualties,
always remove power.
WARNING
Shock Hazard
Do not attempt to remove the RF transmission line while RF power is present.
WARNING
Do Not Service Or Adjust Alone
Under no circumstances should any person reach into an enclosure for the
purpose of service or adjustment of equipment except in the presence of
someone who is capable of rendering aid.
WARNING
Safety Earth Ground
An uninterruptible earth safety ground must be supplied from the main
power source to test instruments. Grounding one conductor of a two
conductor power cable is not sufficient protection. Serious injury or death
can occur if this grounding is not properly supplied.
WARNING
Resuscitation
Personnel working with or near high voltages should be familiar with modern
methods of resuscitation.
WARNING
Remove Power
Observe general safety precautions. Do not open the instrument with the
power on.

Safety Precautions
ii
Safety Symbols
Note: Calls attention to supplemental information.
Warning Statements
The following safety warnings appear in the text where there is danger to
operating and maintenance personnel, and are repeated here for emphasis.
See page 5 .
See page 6 .
Caution Statements
The following equipment cautions appear in the text and are repeated here for
emphasis.
See page 5 .
WARNING
Warning notes call attention to a procedure, which if not correctly
performed, could result in personal injury.
CAUTION
Caution notes call attention to a procedure, which if not correctly performed,
could result in damage to the instrument.
WARNING
When power is in the upper range of the load’s capacity, the radiator will
become hot - care should be used in touching the equipment.
WARNING
Never attempt to disconnect the equipment from the transmission line while
RF power is being applied.
Leaking RF energy is a potential health hazard.
CAUTION
Do not operate this equipment continuously above the rated 150 W.

Termaline® Coaxial Load Resistor
iii
Safety Statements
USAGE
ANY USE OF THIS INSTRUMENT IN A MANNER NOT SPECIFIED BY
THE MANUFACTURER MAY IMPAIR THE INSTRUMENT’S SAFETY
PROTECTION.
USO
EL USO DE ESTE INSTRUMENTO DE MANERA NO ESPECIFICADA
POR EL FABRICANTE, PUEDE ANULAR LA PROTECCIÓN DE
SEGURIDAD DEL INSTRUMENTO.
BENUTZUNG
WIRD DAS GERÄT AUF ANDERE WEISE VERWENDET ALS VOM
HERSTELLER BESCHRIEBEN, KANN DIE GERÄTESICHERHEIT
BEEINTRÄCHTIGT WERDEN.
UTILISATION
TOUTE UTILISATION DE CET INSTRUMENT QUI N’EST PAS
EXPLICITEMENT PRÉVUE PAR LE FABRICANT PEUT
ENDOMMAGER LE DISPOSITIF DE PROTECTION DE
L’INSTRUMENT.
IMPIEGO
QUALORA QUESTO STRUMENTO VENISSE UTILIZZATO IN MODO
DIVERSO DA COME SPECIFICATO DAL PRODUTTORE LA
PROZIONE DI SICUREZZA POTREBBE VENIRNE COMPROMESSA.

Safety Precautions
iv
SERVICE
SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE - TRAINED
PERSONNEL ONLY. TO AVOID DANGEROUS ELECTRIC SHOCK, DO
NOT PERFORM ANY SERVICING UNLESS QUALIFIED TO DO SO.
SERVICIO
LAS INSTRUCCIONES DE SERVICIO SON PARA USO EXCLUSIVO
DEL PERSONAL DE SERVICIO CAPACITADO. PARA EVITAR EL
PELIGRO DE DESCARGAS ELÉCTRICAS, NO REALICE NINGÚN
SERVICIO A MENOS QUE ESTÉ CAPACITADO PARA HACERIO.
WARTUNG
ANWEISUNGEN FÜR DIE WARTUNG DES GERÄTES GELTEN NUR
FÜR GESCHULTES FACHPERSONAL.
ZUR VERMEIDUNG GEFÄHRLICHE, ELEKTRISCHE SCHOCKS, SIND
WARTUNGSARBEITEN AUSSCHLIEßLICH VON QUALIFIZIERTEM
SERVICEPERSONAL DURCHZUFÜHREN.
ENTRENTIEN
L’EMPLOI DES INSTRUCTIONS D’ENTRETIEN DOIT ÊTRE RÉSERVÉ
AU PERSONNEL FORMÉ AUX OPÉRATIONS D’ENTRETIEN. POUR
PRÉVENIR UN CHOC ÉLECTRIQUE DANGEREUX, NE PAS
EFFECTUER D’ENTRETIEN SI L’ON N’A PAS ÉTÉ QUALIFIÉ POUR CE
FAIRE.
ASSISTENZA TECNICA
LE ISTRUZIONI RELATIVE ALL’ASSISTENZA SONO PREVISTE
ESCLUSIVAMENTE PER IL PERSONALE OPPORTUNAMENTE
ADDESTRATO. PER EVITARE PERICOLOSE SCOSSE ELETTRICHE
NON EFFETTUARRE ALCUNA RIPARAZIONE A MENO CHE
QUALIFICATI A FARLA.

Termaline® Coaxial Load Resistor
v
About This Manual
This manual covers the operating and maintenance instructions for the
following models:
Changes to this Manual
We have made every effort to ensure this manual is accurate. If you discover
any errors, or if you have suggestions for improving this manual, please send
your comments to our Solon, Ohio factory. This manual may be periodically
updated. When inquiring about updates to this manual refer to the part number
and revision on the title page.
Chapter Layout
Introduction — Describes the features of the load resistor, lists equipment
supplied and optional equipment, and provides power-up instructions.
Theory of Operation — Describes how the load resistor works.
Installation — Describes the power supply and load connection instructions.
Operating Instructions — Describes the base level operation instructions.
Maintenance — Lists routine maintenance tasks as well as troubleshooting
for common problems. Specifications and parts information are also included.
8135

vi
Table of Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Warning Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Caution Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Safety Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Changes to this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Chapter Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Purpose and Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Performance Characteristics and Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . 1
Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Power and Utility Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Items Furnished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Items Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Tools and Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chapter 2 Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Dielectric Coolant and Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 4 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Use and Function of Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Initial Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Termaline® Coaxial Load Resistor
vii
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation Under Abnormal Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Shutdown Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Emergency Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Oil Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Completeness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RF Assembly Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RF Input Connector Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Diaphragm and Coolant Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
RF Load Resistor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RF Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Diaphragm and Coolant Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
RF Load Resistor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1
Chapter 1 Introduction
Purpose and Function
The Bird Model 8135 Termaline Load Resistor is a portable, general purpose 50
ohm coaxial transmission line termination. It is a self-contained unit requiring
no outside power source or additional equipment. This coaxial load resistor
provides an accurate, dependable, and practically non-reflective termination for
adjustment, standby, and testing of transmitters under non-radiating
conditions.
Performance Characteristics and Capabilities
The Model 8135 can absorb up to 150 watts continuously and dissipate it
harmlessly as heat over a frequency range of DC to 4000 MHz. It is designed to
show low reflectivity throughout this range. The VSWR will be 1.1 to 1.0
maximum from DC to 1000 MHz, 1.2 to 1.0 maximum from 1000 to 2500 MHz
and 1.3 to 1.0 maximum from 2000 to 4000 MHz.
Dimensions and Weight
The Model 8135 is 8-13/16 inches long, 4 inches wide, and 6-7/16 inches high
(224 x 102 x 164 mm). It has a weight of 6 lb (2.7 kg) net and a shipping weight
of 8 lb (3.6 kg).
Power and Utility Requirements
Being a passive electronic device, the Model 8135 needs no outside source or
utility service.
Environmental Requirements
The Model 8135 should be used in a dust and vibration-free environment. The
ambient temperature range should be kept between -40C and +45C (-40F and
+113F) for proper operation. Allow at least 6 inches of clearance around the
load to permit an unimpeded access of convection air currents to the load.

Termaline® Coaxial Load Resistor
2
Items Furnished
The RF input connector, located on the front face of the unit, is a Female N. It is
a special “Quick-Change” design permitting rapid and easy interchange with
other Bird AN type “QC” connectors. This instruction book is the only other item
provided.
Items Required
The only other item required is a matching connector on the coaxial
transmission line.
Tools and Test Equipment
Only simple tools like screwdrivers are needed to disassemble the Model 8135.
A resistance bridge or ohmmeter with an accuracy of one percent or better at
50 ohms is useful for checking the resistance value of the RF section assembly.

3
Chapter 2 Theory of Operation
General
The Model 8135 Termaline Load consists essentially of a cylindrical film type
resistor immersed in dielectric coolant. The resistor, individually selected for its
accuracy, is enclosed in a special tapered housing which provides a linear
reduction in surge impedance directly proportional to the distance along the
load resistor. This produces the uniform, practically reflection-less line
termination over the stated frequencies of the load.
Dielectric Coolant and Seal
The coolant oil is chosen for its desirable dielectric properties and thermal
characteristics. Cooling of the load is accomplished by natural fluid and air
convection. The dielectric coolant, 0.1 gallon, carries the electrically generated
heat from the resistor to the walls of the cylindrical cooling tank.
The tank is encased in a set of heavy gauge metal radiating fins, which are firmly
pressed on the cylinder. The heat from the oil is transferred to the surrounding
air by the radiating fins.
A synthetic rubber diaphragm located in the rear dome of the load allows the
coolant to expand as the temperature rises.

4
Chapter 3 Installation
Location
Free air circulation around the Model 8135 Termaline Load is essential. Keep
the load in the clear, and do not place it near heated surfaces. The Model 8135
should have at least a 6 inch clearance on all sides. Keep the space above the
unit unobstructed for good air circulation. This load is to be mounted only in a
horizontal position to insure that the load resistor will always be immersed in
the coolant.
Mounting
The Model 8135 may be fastened to a work or test bench. To do this, remove
the four rubber bumpers from the bottom of the radiator. These bumpers are
fastened to the corners of the bottom radiator brace by 8-32 studs which are set
permanently into the rubber feet. The bumpers unscrew easily by hand. The
holes are threaded for 8-32 screws. The fasteners must be placed up through
the bench and into the load. These holes are on a 3 x 7 inch rectangle (76 x 178
mm).

5
Chapter 4 Operating Instructions
Use and Function of Controls
The Model 8135 is a passive electronic device and therefore has no controls to
operate.
Initial Adjustment
No adjustments or setting are required.
Start Up
Connect the Model 8135 Termaline Load to the transmitting equipment under
test with 50 ohm coaxial cable such as RG213/U or equal, and a Male N type
plug (UG-21E/U or equal) which mates with the RF Input connector of the load.
After the transmitter has been connected to the load, proceed according to the
transmitter manufacturer’s instructions. When reconnecting the antenna, it
may become necessary to readjust the transmitter due to possible differences
in VSWR.
Normal Operation
Being a passive device, the Model 8135 will function without an operator in
attendance provided its stated performance limits are not exceeded.
WARNING
When power is in the upper range of the load’s capacity, the radiator will
become hot - care should be used in touching the equipment.
CAUTION
Do not operate this equipment continuously above the rated 150 W.

Termaline® Coaxial Load Resistor
6
Operation Under Abnormal Conditions
The Model 8135 can be subjected to moderate overloads for short periods of
time, providing a sufficient amount of time is allowed between intervals for
adequate cooling. An example would be 250 watts for a maximum of 5 minutes,
allowing at least a 20 minute interval for cooling between power applications.
Shutdown Procedures
There is no way to turn off the Model 8135; power must be shut off at the RF
source instead.
Emergency Shutdown
Power must be shut off from the RF source as in the above procedure.
WARNING
Never attempt to disconnect the equipment from the transmission line while
RF power is being applied.
Leaking RF energy is a potential health hazard.

7
Chapter 5 Maintenance
Troubleshooting
For corrections requiring repair or replacement of components, refer to the
appropriate section for your specific model.
.
PROBLEM POSSIBLE CAUSE REMEDY
Leakage of coolant oil
around clamping band or
radiator housing.
Clamping bands not tight. Tighten slightly with
screwdriver.
Faulty O-Ring (front).
Replace. See
"RF Load
Resistor Assembly" on
page 10
Faulty diaphragm (rear).
Replace. See
"Diaphragm
and Coolant Oil" on
page 9
Overheating of the radiator.
Transmitter power too high. Reduce transmitter power.
Coolant oil level too low.
Add more coolant oil to the
radiator. See
"Diaphragm
and Coolant Oil" on
page 9
Faulty RF section assembly.
Replace. See
"RF Load
Resistor Assembly" on
page 10
High and low DC resistance
values per
"RF Assembly
Test" on page 9
Faulty RF input connector.
Replace. See
"RF Input
Connector
Replacement" on page 9
Loose RF input connector. Tighten with a screwdriver.

Termaline® Coaxial Load Resistor
8
Cleaning
Radiator
The principle maintenance required by the operator will be the cleaning of the
radiator fins. Keep the radiator of the Model 8135 Termaline Load clean and
free of dust. Wipe away the accumulated dust and grime with a soft clean cloth.
If the insulator or metallic contact surfaces of the RF input connector should
become dirty or grimy, clean carefully with a soft clean cloth. Use self-drying,
spray or aerosol contact cleaner that leaves no residue on the inaccessible
portions of the connector.
Inspection
Periodic Inspection - with the rugged and simple construction of the Model
8135 Termaline Load, periodic inspection will be necessary at only about six
month intervals. Inspection should include the items listed below:
Oil Leakage
Check for coolant oil seepage around the radiator tank, and particularly at the
front and back around the underside of the clamping bands. See paragraph 5.1,
Troubleshooting, if leakage is observed. Check tightness of the clamping bands,
both front and back.
Cleanliness
Check for cleanliness of the radiator fins and the RF connector. Proceed as in
paragraph Cleaning.
Completeness
Inspect the Model 8135 Termaline Load for completeness and general condition
of the equipment.
Preventive Maintenance
Most of the preventive maintenance procedures are covered in the previous
paragraph 5.5, Inspection. If any portions of the radiator are corroded or rusted,
clean the area carefully with a fine flint sandpaper, and touch up the grey
enamel.

Maintenance
9
RF Assembly Test
DC Resistance - Check the condition of the load resistor by accurate
measurement of the DC resistance between the inner and outer conductors of
the RF input connector. Use a resistance bridge or ohmmeter with an accuracy
of one percent or better at 50 ohms for this purpose. The measured resistance
should be nominal 50 ohms. For greater accuracy, the resistance of the load
should be carefully checked prior to use at ambient room temperature. This
resistance value should be recorded and used as a reference. Subsequent
resistance measurements should not deviate more than two percent from this
value.
Disassembly
There are no special techniques required for the repair or replacement of
components in the Model 8135 Termaline Load. A screwdriver is the only tool
needed. The paragraphs below outline component removal.
RF Input Connector Replacement
The input connector is a patented “Quick-Change” design which permits easy
interchange with the use of only a screwdriver. This process does not interfere
with the essential coaxial continuity of the load resistor RF input or the coolant
oil seal. For replacement, proceed as follows:
1. Remove the four 8-32 x 5/16 inch round head machine screws from the
corners of the RF connector.
2. Pull the connector straight out of its socket.
Diaphragm and Coolant Oil
Remove the diaphragm to replace or examine the coolant oil. Replacement of
the diaphragm and coolant oil are outlined in the following steps:
1. Stand the load vertically, with the back end up.
2. Loosen the clamp screw until clamping band is released.
3. Remove the diaphragm cover and lift diaphragm from back end of radiator
tank. If the diaphragm is no longer pliable or shows signs of surface cracks,
replace it.
4. The coolant oil level should be about one inch below the top of the radiator
cylinder. If the oil appears to be contaminated, replace it.

Termaline® Coaxial Load Resistor
10
RF Load Resistor Assembly
To replace the load resistor assembly, proceed as follows:
1. Stand load vertically, connector end up.
2. Loosen clamp screw until clamping band is released.
3. Lift load resistor assembly straight up out of the cylinder, allowing the
coolant to drip back into cylinder.
4. Inspect the O-Ring seal which is located just inside the mounting flange of the
resistor assembly.
Note: DO NOT reuse the O-Ring if it is no longer pliable or shows signs
of surface cracks.
Assembly
RF Input Connector
Reverse the procedure in the RF Input Connector Replacement paragraph to
install a new connector. Be sure that the projecting center contact pin on the
connector is carefully engaged and properly seated with the mating socket of
the load resistor input.
Diaphragm and Coolant Oil
To reassemble, reverse the procedure in the Diaphragm and Coolant oil
paragraph.
RF Load Resistor Assembly
To replace the load assembly, reverse the procedure in the RF Load Resistor
Assembly paragraph.
Storage
No special preparations for storage are necessary other than covering the load to keep
it dust free. Store in a dry and dust-free environment. Keeping the ambient
temperature within the -40C to +45C (-40F to +113F) working range is
preferable.

Maintenance
11
Customer Service
Any maintenance or service procedure beyond the scope of those in this
chapter should be referred to a qualified service center.
If the unit needs to be returned for any reason, request an Return Material
Authorization (RMA) through the Bird Technologies website. All instruments
returned must be shipped prepaid and to the attention of the RMA number.
Bird Service Center
30303 Aurora Road
Cleveland (Solon), Ohio 44139-2794
Fax: [phone]
E-mail: [e-mail]
For the location of the Sales Office nearest you, visit our Web site at:
http://www.birdrf.com
Shipment
Wrap the RF connector with padding and tape it securely. Pack and brace the Model
8135 in a suitable shipping container. A corrugated paper box should suffice. It
is not necessary to remove the dielectric coolant before shipping.
Specifications
Impedance 50 ohms nominal
VSWR
1.1:1.0 maximum DC-1000 MHz
1.2:1.0 maximum 1000-2500 MHz
1.3:1.0 maximum 2500-4000 MHz
Connectors Female N “QC” type (normally supplied)
Power Range 150 W continuous
Frequency Range DC-4000 MHz
Dimensions 8-13/16"L x 4"W x 6-7/16"H
(224 x 102 x 164 mm)
Ambient Temperature -40C to +45C (-40F to +113F)
Cooling Method Dielectric liquid & air convection
Weight, Nominal 6 lb (2.7 kg)
Operating Position Horizontal only
Finish Grey Powder Coat Paint

Termaline® Coaxial Load Resistor
12
Replacement Parts List
Item Qty. Description Part Number
1 1 RF load resistor assembly 8130-015
2 1 Radiator 2400-025
3 1 O-Ring seal 5-229
4 2 Clamping band assembly 7500-254
5 1 Diaphragm 2400-015
6 1 Diaphragm cap 2400-050
7 1 Connector *See Below
80.5 gallon
(1.9 liters) Coolant Oil 5-030-2 (1/2 gallon container)
*Available QC Type Connectors
N-Female 4240-062
N-Male 4240-063
HN-Female 4240-268
HN-Male 4240-278
LC-Female 4240-031
LC-Male 4240-025
LT-Female 4240-018
LT-Male 4240-012
C-Female 4240-100
C-Male 4240-110
UHF-Female (SO-239) 4240-050
UHF-Male (PL-259) 4240-179
7/8" EIA Air Line 4240-002