Hammond HL-1000A User manual

HAMMONDMANUFACTURINGCOMPANYLIMITED
394 EDINBURGH RD. GUELPH,ONTARIO N1H1E5
PHONE [phone] OR [phone]TELEX:069-56523
HAMMONDMANUFACTURINGCOMPANY(U.S.) INC.
1690WALDENAVE.,BUFFALO, NEW YORK14225
PHONE[phone] TELEX:91-6452
EFFECTIVEOCTOBER 1980
HAMMOND
yVMNUF/OURING,
SERIES
COMMUNICATIONS
PRODUCTS DIVISION
VERN
YE3KPD
HF LINEAR
AMPLIFIER
HL-1000A
HL-1000A
HF LINEAR AMPLIFIER

HL
HF LINEAR AMPLIFIER
HL-1000A
H/MMOND
/M/NUF/OURING..,
Fig. 3
Fig. 4
FEATURES
BANDCOVERAGE 10M, 15M, 20M,40M, 80M,
Amateur Bands
May be expanded for Mars,
Government or otherservices
(ConsultFactory)
SPECIFICATIONS
TUBE
COMPLIMENT
COOLING
ALC
SAFETY
POWER
TRANSFORMER
POWERSUPPLY
INPUT CIRCUIT
OUTPUT CIRCUIT
LINE VOLTAGE
METERING
TRANSIENT
PROTECTION
(1) 3—500Z ZeroBiasTriodes
Forced Air Chimney Cooling
(ContinuousDutySquirrel
CageBlower)
Adjustable, (Negative)
Interlock for Imput AC 100% Fused
AC Line and CathodeCircuit
SpecialHammondTransformer
120171 designed for continuous
dutyoperationrated at
800VA — 60Hz— Weight 21.5 Lbs.
ComputerGradeCapacitors for
Max. Reliability
PI—Input Circuitry for eachband
Full Pi-L Network
120VACor240VAC
Plate Current
Grid Current
Plate Voltage
Relative Output
Primary, HVand Filament
SurgeSuppression
FREQUENCY
RANGE
DRIVE POWER
MODE & DUTY
CYCLE
RF INPUT POWER
PLATE VOLTAGE
3.5 HMzto 29.5 HMz
(Amateur Bands)
75W to 125W
SSB
CW — Continuous
RTTY
SSB— 1 KWPEP Continuous
CW — 1 KW Continuous Input
RTTY — 1 KW ContinuousInput
SSB — WithRestingCurrent
2400VDC
AB2 GroundedGrid
50 n (16dB ReturnLoss)
Depending on Exciter-40dB
Utilize RF InverseFeed-Back
CIRCUIT
CONFIGURATION
INPUT MATCH
HARMONIC
SUPPRESSION
INTERMODULA-
TION DISTORTION In excess of -33dB
PRODUCTS
ALC
TUBES
POWER
REQUIREMENTS
DIMENSIONS
WEIGHT
Negative,Adjustable(-8VDCMax.)
One 3-500ZZeroBiasTriodes
120/240VAC,
Primarycurrent at standby, 4.5A
Primary current at full load 14.0A
8" High x 16" Wide x 15%" Depth
65 Lbs. or30Kg.

Page 2
INTRODUCTION
The Hammond HL1000A HF LinearAmplifier isa one-stage
linear amplifierusing one glassenvelope 3-500Z Eimac
Triode. The unit isa completelyself-containedtable
top unitcapable of 1000watts input. In keepingwith
the pasttradition ofthe HL500 and HL750 seriesamplifiers,
only the highestqualitycomponentswereused inthe
design of thisamplifier. The amplifier is designed
for SSB, CW, RTTY orAM operation onthe amateurbands
between 3.5and 29.7mHz. The amplifier canbe factory
modified for frequenciesoutside the amateurbands for
commercial or military applications.
The HL1008A comes factory wired for115vacbutcanbe
re-wired for230vac operation.
PLEASE READ INSTRUCTIONS carefully and fully
beforeattempting to operate the amplifier.
There are verydangerousvoltages
presentinside the amplifierwhen the power
is inON position.Removing thetop cover
while theAC power is connectedmust be done
cautiously and with the utmost care.
INSTALLATION
1. Remove the amplifierfrom the shippingcarton and
examine for damage, (notify the transportcompany
immediately ifany damage is present.)
Page 3

Page 3.
2. Save the carton for futureshipment to anotherlocation
or storage.
3. The 3-500Z triodetube is shippedseparately and
must be installedbeforeoperatingamplifier in
any way.
4.The followingaccessoriesshould be includedwith
your HL1000A amplifier:
(a) Instruction Manual
(b) WarrantyCard
(c) ShieldedControlCable
(d) ExtraFuses(Cathode l A) (ABC-15)
OPERATINGLOCATION
The amplifiermust be located inan openareasuchthat
the flow ofair from thetopis unrestricted. Location
should beas close as possible toa reliable 115/230
vac AC source to minimize anyAC voltagedrop.
INSTALLING TUBE (See Figure 4)
1. Remove 4 boltsfrombottom of linearcabinet and
carefullyslide the innerpart ofthe unitfrom
the rear ofthe cabinet.
2. Remove the perforated top cover ofthe amplifier
givingaccess tothe interior oftheRF section
ofthe amplifier.
3. Putthe 3-500Z tube inthe socket. Be verycareful
notto exert any lateral or twistingpressure on
the glassportion ofthe tube. The tube is easily
damaged. Fasten the platelead tothe anode connector.
Remove the screw inthetopofthe anodeconnector
on topofthe tube and flex the parasiticchoke
and plate lead until the mountinghole inthe plate
is positioneddirectlyabove the screwhole inthe
anode connector. Insert the screw and hold the
plate leadfirmlywhiletightening the screw.

Page 4-.
Do not, under any circumstances, exert
too great a pressure or twisting,bendingmotion
in the anodeconnector or glassportion ofthe tubes.
Excessivepressure can cause a hair-linefracture
in the tubes' glassenvelope,destroying the tube.
The tubes' pins are alsoparticularly delicate,
and can easilybreak ifthe tube isnot inserted
and removedverycarefully.
4. Replace thetop shield but leave the outsidecabinet
off until the amplifier has beenconnected and tested.
CABLING
All the followingcablesmust be connectedbefore the
amplifier is operated.
AC POWERCABLE
The HL1000Aamplifiercomesfrom the factorywired for
operationfrom a 120vac single phase, 60Hz powersource.
The greenwire inthe powercord isthe ground wire and
must be connected tothe neutralprimary ofthe plug
that you select for connection into the powerline.
The black and whitewiresmust be connected tothe other
two pins forthe120vac operation. The otherlead of
the Belden AC cordplugsdirectlyinto the rearpanel
AC input socket.
Page 5

Page 5
For (115,vac operation, itis onlynecessary to change
several jumperconnections onthe terminalstriplocated
onthe powertransformer inthe powersupplycompartment.
See Figure 1.
220VAC
#14 Jumper
THIS
06- i.
05
04
03
02
01
#14 Jumper
115 VAC
06
05
04
03-i
02
01-
#1-4 Jumper
FIGURE 1 - Power line terminalstrip connections
The amplifierwill be damaged ifthe orangejumper
wire (s)is connectedincorrectly. Be sure to
disconnect AC plugfrom the amplifierbeforechanging
jumpers onthe terminalstrip.
ANTENNACOAX
Use only RG 8/u coax (orits equivalent) to connect
the HL1000A tothe antenna. The antennaconnectormates
with the amphenelconnectormarked RF out, onthe rear
panel ofthe amplifier.
Page 6

Page 6
Do not operate the amplifierwithout
a load or into a loadwith SWR greater than 2:1.
Measure the antennas' SWR with anSWR meter or
in-line Watt-meter and determinethat theSWR
is in factlessthan 2:1.
Withstandby/operateswitch inthe STANDBYposition, the
exciter outputwillpassthrough the amplifierdirectly
to the antenna. The amplifierdoes not have tobeoffto
accomplishthisbypass.
INPUTCABLE
A cablemust be connectedfrom the output of yourexciter
•
to the SO-239 RF inputconnector onthe rearpanel ofthe
amplifier.
ALC (AUTOMATICLEVEL CONTROL) CABLE
Plug theALC cableinto the phono jack located onthe rear
panel (markedALC) and into theALC feedbackconnection
(or equivalent) onthe exciter. Ifthe exciterdoes not
have provision for feedback ofALC voltagefrom the amplifier,
thensimplyomit theuseofthe cable.
ANTENNARELAY
A controlcableshould be pluggedinto the phonosocket
marked antennarelay onthe rearpanel ofthe amplifier.
This cableconnects the keyingsignalfrom the exciter to
switch the amplifier tothe transmitcondition and must
be pluggedinto the socket or connectormarkedantennarelay
(or equivalent) onthe exciter. The exciterneedonlysupply
a shortingrelaycontact(duringtransmit) tokeythe amplifier.
.....Page 7

Page 7
Do not apply any voltage tothe antenna
relay phonejack. The internalrelay is activated
by a self-containedpowersupply.
OPERATING CONTROLS
Refer to Figure 2.
OFF/ONPOWER SWITCH
Thisswitch is used for turning the amplifier onand
Off.
*
MULTIMETERSWITCH
This 4--positiori pushbuttonswitchselects the function
of the multimeter as describedbelow.
HV
With the switch in thisposition, the metermonitors
the amplifiers' platevoltage. The fullscalereading
in thisposition is 3000 VDC. Normalplatevoltage
with the amplifier iri the standbyposition (unkeyed)
is about 2500 VDCforSSBandCW operation.Linevoltage
variationswillcausecorrespondingvariations inthe
platevoltage.(Note:Reading for platevolts is X10<P.
GRID
With the switch in thisposition, the metermonitors
the amplifiers' gridcurrent. The fullscalemeter
reading in thisposition is150ma DC. The nominal
grid currentduring SSBon peaks is approximately 100
ma. Maximum tune-up gridcurrent inSSBorCW single
tone is 14-0 rna marked onthe dial asa red bar.
Page 8

Page 8
RF
The metermonitors the outputpower. Itis usefulduring
tune-ups for verifyingresonance on eachband.
STANDBY/OPERATE SWITCH
Thisswitchallows the exciterbypassfeature,i.e. in
the standbyposition, the power ofthe exciterfeeds
through the linear and appears atthe output connector.
In the operatemode the linear is ready for transmitting.
STANDBY/OPERATE LIGHTS
Thesepilotlightsmarkedstandby and operateindicate
the status ofthe standby/operateswitch. Inthe standby
.mode the light isredandinthe operatemodegreen.
ZENERFUSE
This .5amp fast-biofuse isthe cathodefuse.Never
usea higheramperagefusethan theone specified.
TUNECONTROL
The tunecontrol isa vernierdialconnected toanair
variable intheRF section. The disc dial is screened
100to0 indicatingthatmaximumcapacitance isat100
and minimum at zero.Approximatesettings forthe tune
controlsettings forthe amateurbands are given in Figure
3for yourconvenience.
LOADCONTROL
Thiscontrolmatches the amplifiersoutputnetwork to
the load. Refer to Figure 3 forthe approximateinitial
settings forthe frequencyrangedesired. A loadsetting
of 100 corresponds to maximumloadcapacitormesh and
0 representsminimumcapacitorsetting.
Page 9

Page 9.
BAND
The bandswitchselects the applicableinput and output
circuits forthe HL1000A to operate inanyoneofthe following
bands:
(a)80 meters 3.5 to4.0 mHz
(b)40 meters 7.0 to 7.3 mHz
(c)20 meters14.0 to 14.35 mHz
(d)!5 meters21.0 to 21.45 mHz
(e)10 meters28.0 to 29.7 mHz
Never move the bandswitchwhile the
linear amplifier is keyed or operating.
REAR PANELCONTROLS
Figure 3.
RF OUT:
Nominal outputimpedence is50 ohms. Donot operatethis
equipment without a load or into a loadwhere the SWR is
greater that 2:1. Use onlyRG-8/ucoax orits equivalent
to connect toan appropriate antenna or dummyload.
RF IN:
This amphenol typeSO-239connectoraccepts the drivecoax
from an exciter.
ZENERFUSE:
This fuseprotects the cathodecircuitfrom over-current.
Itisa 1 amp fast-biotype of fuse.
ANT RELAY:
This isa phone jack inputthatwhenshorted to ground the
amplifier antennarelaycloses.
Page 10

Page 10
ALC ADJUST:
Thispotentiometercontrols the sensitivity ofthe HL-lOOOA's
ALC cirucit.
ALC:
TheALC feedback (negative) tothe exciter is available
to this socket.
AC MAIN:
These arethetwo fuses forthe main 115/230 VAC mains.
They areABC ceramic type and must notbe substituted for
any other types.
GND:
"Shis lugis provided to ground the amplifier.Thisshould
be connected toa goodearthground to minimizeradiated
interference orthe danger of electrical shock.
AC INPUT:
This isthe maininput AC socket thataccepts a heavyduty
Beldenpowercord.Note the3 pin arrangement onthe socket
arid the fact that the centre pinis ground.Push the plug
of the powercord when ready foruse until itis fullyseated
in the socket. No othercord is recommended foruse with
this socket.
OPERATION:
PreliminarySettingsSettings
(1) Standby/operate switchStandby
(2) On/off switch On
As soon astheON switch is activated the standbypilot
lamp shouldlight REDandthe meter's a softyellow.
Lookinto the interior ofthe linear to makesurethat
the uube filaments arelitand thatthere isa flow
of air £rom the topofthe cabinet. This canbe done
by puttingyourhandovereachtubefrom thetopto
feel the flow of air. Page 11

Page 11.
The 3-500Z require no warm-up time.
(3) Push HVonthe multimeterswitch. It shouldreadapproximately
24- 26 indicating a platevoltage of 2400-2600.
(4) Switchmultimeterswitch to GRID.
(5) Switch"band"switch to desiredband.
(6) Pre-settune and loadvernierdials to thatreferred
to in calibrationchartfigure Z#
SSB OPERATION:
(7) Withexciteradjusted for zerooutputpress the
switch ofthe excitercausing the HL-1000A andthe exciter
to go into the transmit mode.
•(8) The amplifier's platecurrentmeter shouldregister
approximately 90 ma^P
(9) Increase theRF output ofthe exciteruntil the amplifier's
grid current is about 110 ma. Adjust the tunecontrol ^
^^^^™ ' --._>
for a minimumplatecurrentreadingindicatingresonance.
If the loadcontrol isset properly, the plate current
will be approximately 400ma. Ifthe platecurrent is
lessthan 400 ma, increase the loadslightly by moving
the loadcontrol toa highernumber onthe dial. If
the platecurrent issay more than 420ma decrease* the
load slightly by moving the loadcontrol toa lower*'
number.
Do not forget to re-dip the tune controleachtime the
load control is changed.
Checkthat the grid ma reading is approximately 120
-140 ma, if not, re-adjust the exciter output to give
the required 140ma- 10% gridcurrentreading.
Page 12.

Page 12.
The tuning,loading and excitercontrol
adjustments may have tobe repeatedseveraltimes
until the ratio of140ma grid to 400 ma plate
current is obtained.Notethat the higher the
frequency the moreprecisetheseadjustmentswill
becomeapparent.Also the lower the frequency,
the broader are theseadjustments.
BBMaH The 3-500Z tubeshouldshowcolour,glowing
a dullcherry red with 400maof plate current.
Whenoperated in thismanner, the tubes are within
their ratings andcanbe operated in this way
only ifthe platecircuit isa resonance(plate
currentdipped toa minimumwithtune control).
The amplifiershouldnever be operated forany
length of time inanoff resonancecondition.
(10)Release thePTT switch ofthe exciter to allow the amplifier
and exciter togo into the unkeyed status. Place the
exciter into theSSB mode and whilespeakinginto a
microphone, adjust the audiogaincontrol for voice
peakplatecurrentreadings of around 250ma. The grid
current peaks, should be around 100 ma. Check for proper
drive with a monitorscope ifoneis available.
CW OPERATION:
Tuneamplifier as above --
except that the platecurrentshould beno greaterthan
400 ma. Gridcurrentwill be approximately 120 ma.
AM OPERATION:
Tune and load as aboveexcept that:
(a) gridcurrent = 100ma
(b) platecurrent to giveapproximately 500 watts output.
.Page 13

Page 13.
FSK OPERATION:
The HL-1000A is designed to operate the1 kilowattinput
level continuously and tune adjust as required for120ma
grid current and 400 maof plate current.
ALC ADJUSTMENT:
Drive the amplifier to 400 maof platecurrent and then
rotate the ale controluntil the gridcurrentjustbegins
to decrease. Ifthe exciter cannot drive the HL-1000A to
400 maof platecurrent(single tone) itisnot necessary
to adjust orusetheALC control.
WARRANTY:
All goodssoldhereunder are warranted tobe freefromdefects
in material and workmanship, fora period ofone yearfrom
date of shipment, and thisexpresswarranty isin lieu of
and excludesallotherwarrantieswhetherexpressedorimplied
by operation oflawor otherwiseincluding any warranty
onthe merchantability or fitness fora particular purpose.
Defectivematerial maybe returned tothe sellerafterinspection
bythe seller and uponreceipt of definiteshippinginstructions
bythe seller.Goods so returnedwill be replaced or repaired
without charge, butthe sellershall notbe liable for loss,
damage or expensedirectly or indirectlyarisingfrom the
useof material or from any othercause, the exclusiveremedy
against the sellerbeing to require the replacement or repair
of defectivematerial.Everyclaim on account of defective
material or workmanship or from any othercauseshall be
deemed waived bythe purchaserunlessmade in writingprior
to the expirydate ofthe warranty.
.....Page 14.

Page 14.
IJMMPH The 3-500Z tube is warranted ona one year
pro-ratedbasis. Any warrantyclaimsmust be
accompanied bythe Eimac warranty claimformpackaged
withyour new tube. All claimsmust be filed
with the companyfromwhich you bought the tubes.
Warrantyclaims onthe amplifiermust be accompanied
by proof of purchase and purchase date.
TUNE AND LOAD SETTINGS:
Serial Number
These are approximate settings fora 50ohm load.
Factory Dat^ SSB Settings
FIGURE 5
BAND
80
40
20
15
10
^f if
TUNE 3°R
?£ w
70
40
27
14
08
ACTUAL
READING
LOAD
81
52
30
22
13
T, =400 ma
ACTUAL
READING