Ten Tec 68FTT416 Users Manual

♦ TABLE OF CONTENTS

TABLE OF CONTENTS
LIST OF ILLUSTRATIONS
SPECIFICATIONS
WARNING NOTICES
10 M OPERATION
INTRODUCTION
UNPACKING

1. INSTALLATION

1.1 INTRODUCTION

1.2 ELECTRICAL CONNECTION S

1.3 TRANSCEIVER INTERCONNECTIONS

1.4 ANTENNA REQUIREMENTS

1.5 GROUND CONNECTION

1.6 HIGH POWER OPERATION

1.7 ALC

i – ii

iii – iv

v – vi

vii
viii
viii

viiii

1-1
1-1
1-1
1-1
1-1
1-1
1-2

2. OPERATING INSTRUCTIONS

2.1 INTRODUCTION

2.2 FRONT PANEL CONTROL FUNCTIONS AND INDICATOR

2.2.1 BAND SWITCH

2.2.2 TUNE

2.2.3 LOAD

2.2.4 POWER

2.2.5 OPR-STBY

2.2.6 QSK-PTT

2.2.7 MULTI-METER SWITCH

2.2.7.a EP

2.2.7.b IS

2.2.7.c FWD

2.2.7.d REV

2.2.8 OVERDRIVE

2.2.9 WAIT
. 2.2.10 PEAK METER

2.3 REAR PANEL CONNECTIONS AND CONTROLS

2.3.1 TRANSCEIVER

2.3.2 ANTENNA

2 - 1

2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 1
2 - 2
2 - 2
2 - 2

2 - 3
2 - 3
2 - 3

2.3.3 KEY IN

2.3.4 KEY OUT

2.3.5 PTT – VOX

2.3.6 ALC

2.3.7 ALC CONTROL

2.3.8 A.C. LINE

2.3.9 LINE FUSE

2.4 INITIAL POWER – UP

2.5 TUNE – UP PROCEDURE

2.5.1 CHECKS TO MAKE BEFORE TUNING UP

2.5.2 IMPORTANT POINTS TO REMEMBER

2.5.3 SUGGESTED TUNE – UP PRO
OPERATING HINTS

3.1 INTRODUCTION

3.1.1 TUBES

3.1.2 INTERLOCKS

3.1.3 FUSES

3.1.4 TRANSFORMER RATINGS

3.1.5 AMPLIFIER CONTROL FROM
TRANSCEIVER

3.1.6 120 VAC OPERATION

4. TROUBLESHOOTING

4.1 INTRODUCTION

4.2 MAINTENANCE

5. CIRCUIT DESCRIPTIONS AND ILLUSTRATIONS

5.1 INTRODUCTION

5.2 INPUT MATCHING BOARD (81811)

5.3 15 M INPUT FILTER (81550)

5.4 POWER AMPLIFIER TUBES

5.5 HIGH VOLTAGE POWER SUPPLY BOARD (81809)

5.6 SCREEN SUPPLY AND GRID BIAS BOARD (81815)

5.7 QSK BOARD (81814)

5.8 SWR BOARD (81816)

5.9 PLATE BOARD (81813)

5.10 METER SWITCH BOARD (81812)

5.11 AC LINE DELAY BOARD (81810

2 - 3
2 - 3
2 - 3
2 - 3
2 - 3
2 - 3
2 - 3
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4

3 - 1
3 - 1
3 - 1
3 - 1
3 - 1

3 - 1
3 - 2

4 - 1
4 - 1

5 - 1
5 - 4
5 - 1
5 - 1
5 - 5
5 - 7

5 - 9
5 - 11
5 - 13
5 - 14
5 - 16

ii

LIST OF ILLUSTRATIONS

1 - 1 T/R CONNECTIONS FOR TEN-TEC TRANSCEIVERS
WITH TX OUT AND TX EN
1 - 2 T/R CONNECTIONS FOR OTHER TRANSCEIVERS
2 - 1 MODEL 416 FRONT PANEL
2 - 2 MODEL 416 REAR PANEL
2 - 3 MODEL 416 TOP VIEW
2 - 4 MODEL 416 TUNING CHART
2 - 5 MODEL 416 TUNING LOG
3 - 1 120 VAC OPERATION
4 - 1 TROUBLESHOOTING HINTS
5 - 1 MODEL 416 MAIN WIRING DIAGRAM

81811 INPUT MATCHING BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81809 H.V. POWER SUPPLY BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81815 SCREEN SUPPLY AND GRID BIAS BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81814 QSK BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81816 SWR BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC

1 - 3

1 - 3

2 - 5

2 - 6

2 - 7

2 - 8

2 - 9

3 - 3

4 - 1

5 - 2

5 - 4

5 - 4

5 - 4

5 - 4

5 - 6

5 - 6

5 - 6

5 - 6

5 - 8

5 - 8

5 - 8

5 - 8

5 - 10
5 - 10
5 - 10
5 - 10

5 - 12
5 - 12
5 - 12
5 - 12

iii

81813 PLATE BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81812 METER SWITCH BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81810 AC LINE DELAY BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC
81808 LOAD SHUNT BOARD
PHOTO
CIRCUIT TRACE
COMPONENT LAYOUT
SCHEMATIC

5 - 13
5 - 13
5 - 13
5 - 13

5 - 15
5 - 15
5 - 15
5 - 15

5 - 16
5 - 16
5 - 16
5 - 16

5 - 17
5 - 17
5 - 17
5 - 17

iv

SPECIFICATIONS

BAND COVERAGE

POWER OUTPUT

DRIVING POWER

DUTY CYCLE

EFFICIENCY

INPUT AND OUTPUT
IMPEDANCE’S

160, 80,40, 20, 17 AND 15 meters

1500 WATTS SSB AND CW , 1000 WATTS
CONTINUOUS , RTTY , AND SSTV

70 WATTS TYPICAL FOR 1500 WATTS OUT

A.) SSB-CONTINUOUS VOICE MODULATION
1500 WATTS PEP
B.) CW-50% DUTY CYCLE CONTINUOUSLY
1500 WATTS PEP 30 MIN. KEY DOWN
@1500 WATTS

61.7% MEASURED @ 40 METERS
UP TO 65% DEPENDING ON BAND,
FREQUENCY, LINE VOLTAGE , AND LOAD

50 OHMS UNBALANCED WITH VSWR <2:1

HARMONICS

FULLY BREAK-IN QSK

PROTECTIVE CIRCUITS

PRIMARY POWER

LINE PROTECTION

MEETS OR EXCEEDS FCC REQUIREMENTS
BETTER THAN FUNDAMENTAL -45dB

BUILT IN T/R SWITCHING GUARANTEED
CLOSURE <7mS
OPEN ~ 15mS

A.) SCREEN GRID CURRENT REGULATION
OVER VOLTAGE PROTECTION AND MOV
ARC OVER PROTECTION
LED OVERDRIVE INDICATION
B.) CONTROL GRID CURRENT REGULATION,
OVERDRIVE TRIP , AND LED INDICATION
C.) PLATE CURRENT TRIP AT 1.6 AMP
SERIES RESISTOR FOR ARC ABSORPTION

240 VAC @ 20 AMPS 50/60 Hz -10%+5%

PRIMARY LINE FUSES, INTERLOCK, AND
STEP START INRUSH PROTECTION

v

TUBE

SVETLANA CERAMIC 4CX1600B POWER
TETRODE

COOLING

METERING

STATUS INDICATORS

PLATE VOLTAGE
SUPPLY

DUCT FORCED AIR , VERTICAL EXHAUST ,
USING CENTRIFUGAL BLOWER TO PRODUCE
.50 " PRESSURE DROP IN WATER AT SEA LEVEL
25 DEG C AIR TEMPERATURE. OPTIONAL FAN
AVAILABLE FOR HIGH ALTITUDE OR
CONTINUOUS DUTY.

FULL TIME PLATE CURRENT METER
SWITCH SELECTABLE Ep,Is,FWD, AND REV
POWER
PEAK FDW POWER INDICATED ON FULL
TIME BARGRAPH

POWER ON , WAIT, STANDBY , OPERATE ,
SCREEN GRID OVERDRIVE, CONTINUOUS GRID
CURRENT OVERDRIVE

STEP-START INRUSH PROTECTED 3000 VDC @
NO LOAD 2700 VDC @ FULL LOAD
CURRENT TRIP @ 1.4 AMPS
6 AMP 1000 PIV DIODES IN FULLWAVE
CONFIGURATION FILTERED BY 9 EACH
400 VDC 220 uF ELECTROLYTIC CAPACITORS
10 OHM ARC ABSORPTION RESISTOR

SCREEN SUPPLY

CONSTRUCTION

SIZE

WEIGHT

vi

300 VDC CURRENT REGULATED TO MIN
+23 mA OVER CURRENT TRIP SENSE

ALUMINUM .125" TRANSFORMER AND TANK
CHASSIS. ALUMINUM .062 CONTROL CHASSIS
AND COVERS

H x W x D = 8.2" X 17" X 19"

65 LB.

143.33 KG

WARNING!!!!!!!

This amplifier contains lethal voltages when operating.

DO NOT operate this amplifier with the covers removed.

The power supply circuits in this amplifier produce 3000

VOLTS which is LETHAL!!!

CAUTION!!!

Never attempt to operate the

connecting a suitable antenna or 50 ohm dummy load of

sufficient power rating or SERIOUS DAMAGE MAY

RESULT!

TEN METER OPERATION OF THE

FCC rules permit licensed amateurs to modify their own amplifiers for operation
in the 28 - 29.7 MHz band. If you enclose a copy of your valid amateur radio
license with the warranty registration card for your new amplifier , appropriate
information and an optional input matching circuit will be sent to you without
charge.

TITAN II

TITAN II

without first

AMPLIFIER

vii

INTRODUCTION

TITAN II

The

Model 416 is an advanced design linear amplifier using a single
4CX1600B high power tetrode in a grid driven configuration. This amplifier
uses a ducted forced air cooling system and operates easily at 1500 WATTS
output with maximum efficiency of 65% .
Two panel meters provide system monitoring. One meter dedicated to full time
plate current measurement. The other meter is switchable from plate voltage,
screen current, forward power, or reflected power.
Two front panel leds indicate overdrive conditions in the control grid and
screen grid circuits are about to be reached.
Band coverage includes 160, 80, 40, 30, 20, a nd 17 meters as sh ipped from the
factory. With proof of authorization, 12 and 10 meters may be enabled with
optional matching network from TEN-TEC.
Primary power of 240 VAC is recommended. Operat ion on 110 VAC is
possible with modification to the line input AC board. However, REDUCED
OUTPUT POWER is necessary. Remember 1500 WATTS output @240 VAC
line =20 amps. 1500 WATTS @ 110 VAC = 40 amps. No home line circuits
are capable of 40 amp service. The primary AC lines are fused at 20 AMPS.
MBD-20A or equivalent must be used in replacement to protect the tube.
Interlocks in the primary line and high voltage line are provided to ensure
operator safety.

NEVER DEFEAT THESE SAFETY PRECAUTIONS!!!!

viii

UNPACKING

Carefully remove the amplifier from the packing carton and inspect it for signs of damage. If
the amplifier has been damaged, notify the delivering carrier immediately, stating the full
extent of the damage. Save all damaged cartons and packing material. Liability for any
shipping damage rests with the carrier.

Complete the warranty registration form and mail to TEN-TEC immediately. Save the
packing material for re-use in the event that moving, storage, or reshipment is necessary.
Shipment of your
This is not covered under TEN-TEC warranty.

TITAN II

in other than factory packing material may result in damage.

The following hardware and accessories are packed with your
have not overlooked anything.

2 ea. 20 AMP ABS-20 fuses 27038
2 ea. 4 AMP MDA-4 fuses 27015
1 ea. .056 allen wrench 38040
1 ea. .062 allen wrench 38088
1 ea. # 8 allen wrench 38124

If any of the above are missing, contact the repair department at TEN-TEC for replacement.

Repair dept. [phone]
Switchboard [phone]
FAX [phone]
E-mail [e-mail]

Before powering up your TITAN II , visually inspect the unit for possible physical damage,
such as dents or parts jarred loose during shipment. Cover removal should not be necessary.
If however, you do remove the top , remember the interlocks on both line and high voltage
prevent power up. Replace the top cover securely before line voltage is applied to the

TITAN II.

TITAN II

. Make sure you

ix

CHAPTER 1

INSTALLATION

1.1 INTRODUCTION: When setting up

the station, provide adequate ventilation for
the amplifier. Also, select a location that
allows comfortable access to the front
controls and adequate clearance for rear
panel connections.

1.2 ELECTRICAL CONNECTIONS :

TITAN II

The
AMPS at 240 VAC. Care should be taken
not to overload house wiring circuits usually
fused or breakered at 15 to 20 AMPS.
A straight run circuit with # 10 / 2 with
ground and breaker or fuses at 20 AMPS is
strongly advised.

1.3 TRANSCEIVER
INTERCONNECTIONS : When using the

TITAN II

TXEN-TXOUT connections, follow the
diagram in figure 1-1. The QSK-PTT switch
on the
position for all modes of operation. This
hook-up arrangement will work with the
OMNI series V, VI , and VI+ as well as the
PARAGON I and II.
When connecting the
rigs, use the diagram in figure 1-2. Note that
the key or keyer must be connected to the

TITAN II

amplifier draws up to 18

with TEN-TEC transceivers with

should be in the QSK

TITAN II

with other

key in jack on the
from the external T/R N.O. relay contacts on
the transceiver must be connected to the
PTT/QSK jack on the
using this configuration, the QSK/PTT
switch on the amplifier must be in the QSK
position for CW, and in the PTT position for
SSB.

1.4 ANTENNA REQUIREMENTS :

TITAN II

The
with antennas resonant at the frequency of
operation and having impedances within the
limits of 25 to 100 OHMS or an SWR of 2:1
or less. Note that other than 1:1 impedances
will result in TUNE and LOAD setting
different from those in the reference chart
(figure 2-7).
The nominal output impedance of the
amplifier is 50 OHMS. Many antennas
exhibit an SWR
of more than 2:1 in some part of the band.
For operation under these conditions , we
recommend using an antenna matching
network that will enable the
work into a 50 OHM load for maximum
power transfer to the antenna. TEN-TEC
models 253,229 or 238 are suitable
companion tuners.

TITAN II

amplifier is designed for use

, and the line

TITAN II.

TITAN II

When

to

1-1

CAUTION!!!

Never attempt to operate the

antenna or 50 OHM resistive load of sufficient power rating or

SERIOUS DAMAGE MAY RESULT!

TITAN II

without first connecting a suitable

1.5 GROUND CONNECTIONS : In the
interest of personal safety an to reduce the
possibility of stray RF pickup on
interconnecting cables, all station equipment
should be well grounded to earth and to
supply line ground bus. It is important to
strap all equipment chassis together with
short heavy leads. This ground bus may then
be tied to an external earth grounding rod.

1.6 HIGH POWER OPERATION : The

TITAN II

amplifier operates very
comfortably at a maximum of 1500
WATTS output. The problem is that other
components in your station may not. Before
operating at this power level , be certain to
check the following items :

1. The coax from the TITAN II to the
feed point of your antenna must be
top quality RG- 8X or better. We
recommend silver plated connectors
rather than chrome plated
connectors. Make sure that all coax
connectors are tight(snug them up
with a pair of pliers).

2. All coax switches or relays in the feed
line must be rated at 1500 WATTS or
higher. NEVER ACTIVATE IN­LINE SWITCHES WHILE
TRANSMITTING.

3. Verify that the components in your
antennas are rated for the TITAN II
maximum power levels (dipole
center insulator, end insulators,
balluns , traps , etc.). Make sure that
all radiating sections are well clear of
metallic objects such as rain gutters
and antenna supporting structures.

For the first few hours of operation ,

check the SWR frequently. Any
increase in reflected power is an
indication that something between
the amplifier and the antenna
elements ,including the end

insulators, is heating and must be
corrected.

4. A solid earth ground is essential.
Every station will have a unique
electrical ground due to location of
equipment , distance between units ,
distance from house wiring ground
rod , distance from RF ground rod
etc. The only common theme should
be to keep equipment ground straps
as short and thick as possible and RF
ground rod as close to the station as
possible.

5. If you use an antenna tuner , make
all SWR/matching adjustments with

TITAN II

the

in the STANDBY
mode and use transceiver low power
only.

6. If any of your home entertainment
electronic devices have RF leaks ,

TITAN II

the

will find them. The
problem will develop because of
fundamental overloading , rather than
from spurious emissions or
harmonics. If you are not familiar
with the standard procedure for
controlling this type of interference ,
consult the ARRL Radio Frequency
Interference Manual.

1.7 ALC : Today , most solid state
transceivers provide no connection for ALC
input and it is entirely unnecessary to make
any external ALC connection to these rigs.
The ALC output jack is used primarily with
tube-type transmitter/transceivers with a
negative going ALC system. The ALC
ADJUST control is used to set the threshold
for proper ALC action. This is -1 to -15
VDC depending on input RF drive level.
This negative level will be present at the
ALC jack even when the TITAN II is in the
STANDBY mode or power off.

1-2