Palstar BT1500A User manual

Palstar Incorporated
9676 N. Looney Rd.,
Piqua, OH 45356 USA
Customer Service and Sales Telephone:
1-800-773-7931
Fax:
1-937-773-8003
Email:
in [e-mail]
Rev. 1.10 31 ug 2010
© Copyright 2006-2010 Palstar, Inc.
Printed in the U.S.A.
BT1500A 1500 Watt
Balanced Antenna Tuner
Owner’s Manual

1-800-773-7931 WWW.PALSTAR.COM
2 Important
WARNING: TO PREVENT FIRE OR
ELECTRICAL SHOCK DO NOT
EXPOSE TO RAIN OR MOISTURE
1. Read Instructions—All the safet and
operating instructions should be read before
the appliance is operated.
2. Retain Instructions—The safet and
operating instructions should be retained for
future reference.
3. Heed Warnings—All warnings on the
appliance should be adhered to.
4. Follow Instructions—All operating and
use instructions should be followed.
5. Cleaning—Unplug this appliance from the
wall outlet before cleaning. Do not use liquid
cleaners or aerosol cleaners. Use a damp
cloth for cleaning.
6. Do Not Use ttachments—not recom-
mended b the manufacturer or the ma
cause hazards.
7. Water and Moisture—Do not use this
product near water—for example, near a
bathtub, wash bowl, kitchen sink, laundr tub,
in a wet basement, or near a swimming pool—
and the like.
8. ccessories—Do not place this product on
an unstable cart, stand, tripod, bracket, or
table. The product ma fall, causing serious
injur to a child or adult, and serious damage
to the appliance.
9. Ventilation—This product should never be
placed near or over a radiator or heat register.
This product should not be placed in a built-in
installation such as a bookcase or rack unless
proper ventilation is provided or the manufac-
turer’s instructions have been adhered to. An
slots or openings in the cabinet are provided
for ventilation. To ensure reliable operation of
the video product and to protect it from over-
heating, these openings must not be blocked
or covered. The openings should never be
blocked b placing the product on a bed, sofa,
rug, or other similar surface.
10. Grounding or Polarization—this product
is equipped with a 3-wire line cord receptacle.
It is intended for use with a 3-wire properl
grounded power socket. Do not defeat the
safet purpose of the supplied line cord and
plug.
11. Power Sources—This product should be
operated onl from the t pe of power source
indicated on the marketing label. If ou are not
sure of the t pe of power supplied to our
home, consult our appliance dealer or local
power compan .
12. Power-cord Protection—Power-suppl
cords should be routed so the are not likel
to be walked on or pinched b items placed
upon or against them. Pa particular attention
to cords at plugs, convenience receptacles,
and the point where the exit.
13. Lightning—For added protection for this
product during a lightning storm, or when it is
left unattended and unused for long periods of
time, unplug it from the wall outlet.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT
OPEN THE CABINET WHILE OPERATING. REFER SERVICING TO
QUALIFIED PERSONNEL ONLY.
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT USE THE THREE WIRE
CORD WITH AN EXTENSION CORD RECEPTIACLE OR OTHER
OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE.
An appliance and cart combination should
be moved with care. Quick stops, exces-
sive force and uneven surfaces ma cause
the appliance and cart combination to
overturn.
The lightning flash with arrow head
s mbol, within an equilateral triangle, is
intended to alert the user to the presence
of uninsulated “dangerous voltage” within
the product’s enclosure that ma be of
sufficient magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompan ing the appliance.
Service and Warranty 19
1-800-773-7931 WWW.PALSTAR.COM
Limited Warranty
Palstar Inc. warrants products manu actured by it to be ree rom de ects in
material and workmanship under normal use and service for a period of one
(1) year from the date of delivery to the first buyer (the “Warranty Pe-
riod”). Palstar Inc’s obligation under this warranty is limited to repair or replace-
ment o the product; at its option at the Palstar actory in Piqua, OH.
E ective only when the product is returned to the actory with all trans-
portation charges prepaid and examination o the product discloses in Palstar’s
judgment, to have been de ective during the Warranty Period.
The Warranty Period shall not extend beyond its original term with re-
spect to interim in-warranty repairs by Palstar. This Warranty Period shall not
apply to any product which has been repaired or altered by anyone other than
Palstar without prior written authorization. Warranty does not extend to any
products which have been subject to damage rom improper installation, applica-
tion or maintenance in accordance with the operating speci ication. Palstar nei-
ther assumes nor authorizes any person to assume or it any obligation or liabil-
ity other than herein stated.
Repair Policy
When sending in a product or service, please “double” box it care ully and
ship it insured or your protection. Please include a note clearly describing the
problem, how you wish the item returned and how you wish to pay or the
service. Package your unit properly. Palstar, Inc. is not responsible or merchan-
dise damaged in shipment. Our service rate is $30 per hour (1/2 hr. minimum).
Return Policy
All returns must receive prior authorization rom Palstar. Returned items
must be received in original—AS SHIPPED– condition including the original box,
manuals, accessories, and copy o sales receipt. Returns must be within 14 days
o purchase. Returned items are subject to a 25% restocking ee. Shipping is not
re undable.

18 Specifications
1-800-773-7931 WWW.PALSTAR.COM
Front Panel Indicators and Controls
Metering Dual movement cross needle power and SWR meter
Controls
Capacitor Dual Section Capacitor: 960pF & 65PF @ 4.5kV
Inductance Dual 22 µH roller inductors: 12 ga. wire wound on
steatite ceramic core, silver plated shaft and wheel
Wattmeter Range Switch 2 position 300 W /3000 W
Other controls: Low Pass (Hi - Z) / High Pass (Lo - Z) switch
Hi - C / Lo - C switch
Peak/Average Metering
Peak Hold Metering
Rear Panel Connectors
RF INPUT SO239 chassis connector
Balanced Line Output Dual High Voltage N lon66TM terminal posts
9-12 VDC Input @ 200ma 2.1 mm connector (center positive). AC Power Adap-
tor supplied (U.S. onl )
Other
Frequenc Coverage 1.8 — 29.5 MHz
Power Maximum 1500 W PEP SSB, 1000 W single tone continuous
Impedance Range 2500 +/- j2500 160 m to 20 m
(assuming Resistive load) 1000 +/- j1000 17m to 10m
Input balun 1:1 current t pe balun
Dimensions 6” H x 13” W x 16” D (incl. terminals)
Weight 17 lbs.
Materials Chassis and top cover is 11 ga. (.090) aluminum
that has been chem-film treated in gold color. Front
panel and cover powder coated.
1-800-773-7931 WWW.PALSTAR.COM
Important Safeguards 3
14. Power Lines—An outside antenna s s-
tem should not be located in the vicinit of
overhead power lines, other electric light or
power circuits, where it can fall into such
power lines or circuits. When installing an
outside antenna s stem, extreme care should
be taken to keep from touching such power
lines or circuits as contact with them ma be
fatal.
15. Overloading—Do not overload wall out-
lets and extension cords as this can result in a
risk of fire or electric shock.
16. Object and Liquid Entry—Never push
objects of an kind into this product through
openings as the ma touch dangerous volt-
age points or short-out parts that could result
in a fire or electric shock. Never spill liquid of
an kind on the product.
17. Servicing—Do not attempt to service this
product ourself as opening or removing
covers ma expose ou to dangerous voltage
or other hazards. Refer all servicing to quali-
fied service personnel.
18. Damage Requiring Service—Unplug this
product from the wall outlet and refer servicing
to qualified service personnel under the fol-
lowing conditions:
a. When the power-suppl cord or plug is
damaged.
b. If liquid has been spilled, or objects have
fallen into the product.
c. If the product has been exposed to rain or
water.
d. If the product does not operate normall b
following the operating instructions. Adjust
onl those controls that are covered b the
operating instructions. An improper adjust-
ment ma result in damage and will often
require extensive work b a qualified
technician to restore the product to its normal
operation.
e. If the product has been dropped or the
cabinet has been damaged.
f. When the product exhibits a distinct change
in performance—this indicates a need for
service.
19. Replacement Parts—when replacement
parts are required, be sure the service techni-
cian has used replacement parts specified b
the manufacturer or have the same character-
istics as the original parts. Unauthorized sub-
stitutes ma result in fire, electric shock or
other hazards.
20. Safety Checks—Upon completion of an
service or repairs to this product, ask the
service technician to perform safet checks to
determine that the product is in proper operat-
ing condition.
21. Outdoor ntenna Grounding—Before
attempting to install this product, be sure the
antenna or cable s stem is grounded so as to
provide some protection against voltage
surges and built-up static charges.
a. Use No.10 AWG copper, No.8AWG alumi-
num, No.17AWB copper-clad steel or bronze
wire or larger, as ground wire.
b. Secure antenna lead-in and ground wires to
house with stand-off insulators spaced from 4
feet to 6 feet apart.
c. Mount antenna discharge unit as close as
possible to where lead-in enters house.
d. A driven rod ma be used as the grounding
electrode where other t pes of electrode
s stems do not exist. Refer to the National
Electric Code, ANSI/NFPA 70-1990 for infor-
mation.
e. Use jumper wire not smaller than No.6
AWG copper or equivalent, when a separate
antenna grounding electrode is used.

4 Table of Contents
1-800-773-7931 WWW.PALSTAR.COM
Important safeguards 2
General Description 5
Installation 6
Unpacking 6
Location 6
Installation Procedures 6
Rear Panel Connections 7
Front Panel Description 8-9
Schematic Diagram 10-11
Operating Your BT1500 12
Before Operating 12
Tuning 12
Notes 13
Understanding Your Tuner 14
Specifications 18
Service and Warranty 19
Thank ou for purchasing a
Palstar BT1500A Antenna
Tuner. This antenna tuner has
been designed and manufac-
tured to high qualit standards,
and will provide reliable opera-
tion for man ears.
Please carefull read the
Owner’s Manual in order to take
advantage of the man interest-
ing features that will provide
ears of enjo able amateur
radio operation.
system of switches. Knife switches work very well for parallel transmission line,
since they will handle the high voltages that may be present on parallel transmis-
sion lines . As with any run of parallel transmission line, you must keep the line
free and clear of metallic objects. As well, do not coil the line itself. Instead,
make a single large loop.
The si e of the loop depends on the frequency of operation and how much further
along the line you must go to obtain an impedance value that falls within the
tuner limits.
It is possible to calculate favorable line lengths for each band for any combina-
tion of antenna and feedline. The very large variety of antennas and the many
types of feedlines used by amateur operators place such calculations outside the
scope of these notes. Most operators find it quicker to experiment with various
line lengths until they uncover the right combinations for each band.
The balanced L-network, the transmission line, and the antenna form a total sys-
tem that is very flexible. The initial inability to find a 1:1 SWR match for the
system is not a fault of any of the three major components. Instead, the situation
is a normal function of the dynamics of the antenna feedpoint impedance and its
transformation along the transmission line. You may alter any of the three com-
ponents of the system to arrive at an impedance at the antenna terminals that the
tuner can match. In most cases, but not all, modifying the transmission line
length is the easiest technique. Alternatively, you may alter the antenna length as
well.
There are many resources available for learning more about your antenna and
feedline system. The ARRL Antenna Book is a good place to start. In addition,
there are numerous aids to making calculations of what is occurring in the sys-
tem.
The more that you know about your antenna and feedline system, the more effec-
tively you will be able to use your Palstar BT1500A tuner.
Understanding Your Tuner 17
1-800-773-7931 WWW.PALSTAR.COM

16 Understanding Your Tuner
1-800-773-7931 WWW.PALSTAR.COM
higher if the impedance has a reactive component.
Your Antenna and Feedline: The balanced L-network can be used with any
antenna fed with parallel feedline. Parallel feedlines may range from 300 Ohm
TV twin lead, to “windowed” lines in the 400—450 Ohm range, to 600 Ohm (and
higher) ladder lines. The applicable types of antennas include flat-top and Vee’d
all-band doublets, hori ontally or vertically oriented loops, end-fed wires, and
arrays such as the la y-H and the 8JK. There are also a number of designs for
wire Yagis and quad beams that employ parallel transmission lines.
At any given operating frequency, the antenna has a certain feedpoint impedance.
For most multi-band antennas, the feedpoint impedance will change with the
operating frequency. On most bands, the impedance will be complex, that is, a
combination of resistance and reactance. However, unless your feedline happens
to be an exact multiple of a half wavelength (accounting for the line’s velocity
factor) or unless the feedpoint impedance is identical to the characteristic imped-
ance of the feedline, your antenna tuner will not encounter the antenna feedpoint
impedance.
For any condition where the feedpoint impedance does not exactly match the
characteristic impedance of the feedline, the impedance will vary continuously
along the feedline, returning to the feedpoint value at every half wavelength
along the line. The precise values that you will encounter at some specific point
along the line depend upon the characteristic impedance of the line, its velocity
factor, and the feedline impedance itself. The range of variation in both resistance
and reactance is a function of the degree of difference between the feedpoint
impedance and the characteristic impedance of the feedline.
Many users of multi-band antennas are surprised to learn that even very high
feedpoint impedances can result in very low impedances at certain regions along
the feedline. An end-fed wire at any frequency, or a center-fed wire that is close
to a multiple of a wavelength long will present a very high impedance. If your
feedline is the right length, you may find that the impedance at the antenna termi-
nals is very low. Alternatively, at other lengths, you may discover that the reac-
tance at the antenna terminals is outside the range for which the output capacitor
can compensate. Without careful computation, you may not know which condi-
tion applies. You may only know that the tuner seems unable to provide 1:1
SWR for the line to the transmitter.
A Simple Work-Around: There are many ways to correct the problem of being
unable to effect a good match on one or more bands of operation when using a
balanced feedline. One of the simplest and cheapest techniques is to insert extra
feedline into the length from the tuner to the antenna. Since the losses on the
parallel line are very low, a few extra feet of transmission line will not be detect-
able by the station you are working.
The sketch shows the general idea. You can insert the loop manually or with a
General Description 5
1-800-773-7931 WWW.PALSTAR.COM
The Palstar BT1500A Antenna
Tuner is an American made im-
pedance matching network.
The BT1500A optimizes the per-
formance of our antenna and
transmitter b providing adjust-
able impedance matching using
balanced dual tandem roller in-
ductors with a shunt capacitor
that can be switched to the input
(transmitter) side or the output
(antenna) side.
The BT1500A also measures
the power and Voltage Standing
Wave Ratio (VSWR or SWR)
which allows ou to tune the
SWR to the lowest ratio possible
for the selected transmission
frequenc .
A switch allows the user to
choose Average or Peak meter-
ing. Also, a Peak Hold function
holds the peak reading for ap-
proximatel 2 seconds for easier
reading.
Front panel controls allow for
selection between two ranges of
variable capacitance, and allow
the shunt capacitor to be
switched between the input
(transmitter) side (low Z, high
pass) and the output (antenna)
side (high Z, low pass).
Tuning is achieved with the front
panel controls. The Vernier ca-
pacitor dial allows for fine tuning
with precision and accurac ,
while the Inductor crank handle
provides coarse adjustments.
The range of the power meter
(300W/3000W) is selected b a
push button switch located on
the front panel.

W RNING: Balanced antennas will produce high
RF voltages at the output post connectors. RF
burns may result if touched during transmission.
6 Installation
1-800-773-7931 WWW.PALSTAR.COM
Unpacking
Carefull remove the BT1500A from the shipping car-
ton and inspect it for signs of damage. If an damage is
apparent, notif the transportation carrier or dealer im-
mediatel . We recommend keeping the packing car-
ton for moving, storing or reshipping the tuner to
us for repair if required.
Location
Select a location for the BT1500A that allows the con-
nectors to be free from an possible contact with peo-
ple, pets or objects during operation, and with unre-
stricted air flow for cooling.
Installation Procedures
Connect a coax cable from our transmitter to the RF
INPUT connector on the rear panel. Keep the cable as
short as possible. If ou use a linear amplifier, connect
our transmitter to the linear amplifier input and the lin-
ear amplifier output to the BT1500A.
Connect our balanced antenna feedline to the upper
white N lon66TM BALANCED OUTPUT posts on the
back panel.
Understanding Your Tuner 15
1-800-773-7931 WWW.PALSTAR.COM
two equal series portions, one in each leg of the network. The shunt capacitor has
the same value in both versions of the L-network.
Unlike the single-ended L-network, the legs of the balanced L-network are both
above ground potential. Hence, both the input and antenna sides of the network
are balanced. In order to accommodate the single-ended transmission line from
the transmitter, the tuner places a 1:1 choke (current) balun between the input
side of the network and the transmitter coax connector. The balun converts the
unbalanced input from the transmitter to a balanced condition for the network.
As well, it suppresses currents that might otherwise appear on the braid of the
transmitter cable.
Limitations: Every antenna tuner, no matter what the type, has limits to the
range of impedances that it will match to the 50 Ohm input. The balanced L-
network is no exception. Understanding those limitations will help you to effect
a match on every band.
The impedance presented to the tuner antenna terminals is usually expressed as a
series combination of resistance and reactance, that is, R +/- jX Ohms. The L-
network that places its shunt capacitor on the antenna side is normally an up-
converter. The limiting lower end impedance is in the vicinity of 60 to 100 Ohms
resistive for a 50 Ohm input. The upper limit of impedance that the network will
match is a complex function of frequency, the component values, and the amount
of reactance that is part of the impedance at the tuner terminals. For most of the
HF Amateur bands, the upper impedance limit of the balanced L-network in the
Palstar BT1500A tuner is about 2500 +/- j2500 Ohms. This upper limit descends
slowly with rising frequency so that at 30 MH the upper limit is about 400 +/-
j400 Ohms. The decrease in range results from the unavoidable minimum ca-
pacitance of the output variable capacitor.
The impedance presented to the antenna terminals may be any value of R and any
value of X. For a given R component, the tuner will require a certain setting of
the coil and also the capacitor. If there is reactance at the antenna terminals, then
the network requires a lower value of C if the reactance is capacitive, and a
higher value of C if the reactance is inductive. The network compensates for the
reactance by increasing or reducing the capacitive reactance required for a purely
resistive load with only small changes in the required inductance. The amount of
compensation available is a function of the maximum and minimum values of
shunt capacitance and the resulting reactance of this component. With finite
components, the range of reactance for which the network can compensate is
always limited.
As well, every matching network incurs losses within the network, mostly as a
function of the Q of the inductor and the ratio of the antenna terminal impedance
to the input impedance. For the balanced L-network with a shunt output capaci-
tor, the higher the impedance to be matched, the higher the losses. The losses
will be lower if the reactance at the antenna terminals is purely resistive and

14 Understanding Your Tuner
1-800-773-7931 WWW.PALSTAR.COM
Understanding Your PALSTAR BT15 A Tuner and Your Antenna
The PALSTAR BT1500A antenna tuner is a highly flexible matching device
intended for use with antennas that use balanced or parallel transmission lines.
To obtain the best performance from the tuner, you should understand how the
tuner works and how it relates to your antenna and feedline.
Basic Operation: Examine the schematic diagram of your tuner to see all of the
electronic features. In this discussion, we shall focus only upon the matching
network itself. The basic circuit under discussion is a balanced L-network with
the shunt capacitor on the output side.
A single-ended L-network — the most common variety — uses a certain value of
inductance (L) and a certain value of capacitance (C) to effect a match at a par-
ticular frequency for a particular antenna feedline impedance and length. For
coaxial cable systems, the single-ended L-network provides the lowest loss of
any network matching system. However, one limitation is that with the capacitor
on the antenna side of the coil, the system is limited to antenna terminal imped-
ances greater than about 50 Ohms. If we wish to use the single-ended network
with a balanced feedline, we have to add a balun on the output side of the net-
work. Baluns work best with very low values of reactance on their output termi-
nals, a condition that is difficult to obtain with most antennas that use parallel
feedlines.
The balanced version of the L-network overcomes this limitation by providing a
true balanced output directly from the network. For a particular antenna, operat-
ing frequency, and transmission line impedance and length, the matching circuit
requires the same total circuit inductance and the same output capacitance as the
single-ended network. However, the balanced circuit divides the inductance into
7 T1500CV
1-800-773-7931 WWW.PALSTAR.COM
Rear Panel Description 7
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12VDC INPUT
(2.1 mm plug) or
12VDC.
RF INPUT Coaxial con-
nector or input rom
transmitter or ampli ier. GROUND Post/wing nut
ground connector.
BALANCED OUTPUT
Two Nylon high voltage connectors or
output to RF balanced transmission lines.
Balanced line o any impedance (300Ω,
450Ω, 600Ω) can be used to eed the
antenna.
FIGURE 1 REAR PANEL CONNECTORS

T1500CV Schematic
8
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8 Front Panel Description
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1. TUNE. Dual section variable capacitor (960 &
65pf). Can be switched from output to input side of net-
work using switch # 4.
2. POWER/SWR METER. Dual needle meter dis-
pla s FORWARD and REFLECTED power in watts.
SWR is measured where the two needles intersect on
the red scale. Metering works only if the unit is pro-
vided with 12VDC at the rear power jack.
3. Hi-Lo P SS. Two position switch selects Low
Pass (High Z, capacitor on output side), and High Pass
(Low Z, capacitor on input side). The switching is per-
formed with a 40 amp contact rela . This function
only works if the unit is provided with 12VDC at the
rear power jack.
4. Hi-Lo C P CITOR. Two position switch selects
the low value variable capacitor section of 65pf, or par-
allels the two sections for a total of 1025pf. The switch-
ing is performed with a 40 amp contact rela . This
1 2 3
5 6 7 8
4
9
Operating Your BT1500 13
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C UTION: When approaching the end stops of the
roller inductors, SLOW DOWN. Running the rollers
too hard into the mechanical end stops on either end of
the inductors can damage them.
reading o 50-100 watts on the FORWARD scale. Adjust the
TUNE and INDUCTOR controls or a minimum REFLECTED
reading while maintaining a FORWARD reading o 50-100 watts
using your transmitter power control.
The TUNE control varies the capacitor and provide fine
ad ustments. The INDUCTOR crank control provides coarse
ad ustment.
7. Read the SWR on the red scale at the point where the
two needles intersect. Repeat STEP 6 until the lowest SWR read-
ing is obtained. The SWR should be 2:1 or lower.
8. When you have tuned your antenna to the best SWR, re-
cord the settings o the TUNE and INDUCTANCE controls on
the chart above or uture re erence. When you retune, use these
settings as your starting point.
Notes:
1. An SWR o 1:1 is best, but an SWR as high as 2:1 may be
acceptable. Check your transmitter/ampli ier manual or details.
2. I you cannot get an acceptable SWR, lengthen or shorten
your antenna and/or eedlines and retune.
3. Any time a new or di erent antenna is connected, it is nec-
essary to repeat the tuning procedure or each antenna.
4. Once every 4-6 months clean the roller coil with 70% iso-
propyl alcohol and a clean cotton cloth. Do not trans er any o
the conducting grease on the rod that guides the roller wheel as
this will contaminate the windings on the roller coil body. All
points o rotation are actory lubricated and this is not required
by the user. All moving parts are actory lubricated with Lithium
grease only.

12 Operating Your BT1500
1-800-773-7931 WWW.PALSTAR.COM
Before Operating
1. To avoid possible damage to the BT1500A, set TUNE, IN-
DUCTOR, and POWER RANGE switches as outlined in the chart
below be ore applying transmitter power. (NOTE: the BT1500A
must be supplied with 12VDC or the switch unctions and the
Peak/Peak Hold metering to work.)
2. Begin tuning with your transmitter/amp that is eeding the
tuner set at a low output power setting (100 Watts).
Tuning
1. Select the band and requency o desired operation.
2. Set TUNE and INDUCTOR controls to the suggested set-
ting be ore applying transmitter power (see chart - documented
with 270Ω non-reactive). Actual settings will vary rom antenna
to antenna.
3. Set your transmitter/ampli ier to a low power output. I
your transmitter has a TUNE position, select that position.
4. I you use a linear ampli ier, set it to Standby. Do not use
the linear ampli ier until the BT1500A is tuned. Do not exceed
1000 watts continous (single tone) during operation.
5. Set RANGE switch to 300W (button out).
6. Key your transmitter and adjust the power level or a
W RNING: DO NOT OPER TE THE BT1500
WITH THE COVER OFF.
TUNING SWITCH SETTING INDUCTOR
SUGGESTED ACTUAL HI-C LO-C HI-Z LO-Z SUGGESTED ACTUAL
160 M 66 HI-C HI-Z 156
80 M 35 HI-C HI-Z 184
40 M 20 HI-C HI-Z 215
20 M 11 HI-C HI-Z 231
17 M
15 M 35 HI-C HI-Z 237
12 M 18 HI-C HI-Z 238
10 M 15 HI-C HI-Z 240
BAND
function only works if the unit is provided with
12VDC at the rear power jack.
5. INDUCTOR. Two 22uH roller inductors mounted
in tandem, with turns counter.
6. POWER. A two position button. When in the IN
position, turns on meter illumination and powers the Hi-
Lo Pass and Hi-Lo Capacitor switch functions and the
metering functions. The unit must be provided with
12VDC at the rear power jack.
7. R NGE. Two-position switch selects the range of
FORWARD and REFLECTED power displa ed on the
power meter.
When the RANGE button is OUT, the FORWARD
meter scale reads 300 watts full scale and the RE-
FLECTED meter scale reads 60 watts full scale.
When the RANGE button is IN, the FORWARD
meter scale reads 3000 watts full scale and the RE-
FLECTED meter reads 600 watts full scale.
8. PE K/ VER GE. Selects between Average
power reading and Peak power reading. Active circuitr
provides a peak reading for SSB. For the Peak reading
function to work, the POWER switch (#6) must be on.
9. PE K HOLD. When the Peak reading function is
selected (#8), the Peak Hold provides an approximate
2 second hold at the peak level for eas viewing.
NOTE: The Peak Hold will function onl if the PEAK
button (#8) and the Power button (#6) are depressed
as well.
ront Panel Description 9
1-800-773-7931 WWW.PALSTAR.COM

1-800-773-7931 WWW.PALSTAR.COM
10 Schematic Diagram
1-800-773-7931 WWW.PALSTAR.COM
Schematic Diagram 11