For
official use only!
Radio and Intercom in the Tiger Tank and Command Tanks from 15.4.1943
Picture.
5 A.
General description
1.
The Tiger Tank (Pz Kpfw Tiger as additional vehicle) was produced in 2
versions; the Sd Kfz 267 and Sd Kfz 268. These two models differed
only in radio equipment systems.
They were: Sd Kfz 267: 1 set Fu 5 and 1 set Fu 8.
Sd Kfz 268: 1 set Fu 5 and 1 set Fu 7.
Special fittings and storage of equipment and intercom are alike, in both cases.
Radios are set up so that communication can take place between crew and /or
commander, as well as for listening and following radio traffic. The
communication officer has the "intercom B".
B. Description of Radio Installation.
1. Radio communication system
2. Two radio operators are required to operate different radio-systems.
a) Radio operator #1 attends to radio set Fu 8 (30 W transmitter + M wave
receiver e) in Sd Kfz 267 or radio-equipment Fu (WG D + Ukw E D 1 in SD Kfz 268.
They are located at the front and to the right of the driver.
b) Radio operator #2, attends radio-equipment Fu 5 (10Wsc + Ukw Ee). This
radio equipment is fitted in the turret, in front of the loader. Thus at the
same time, the radio operator #2 becomes also a loader.
Page 6 Antenna for the radio set of Fu 8
(30 WG A + Mw E c)
Antenna for radio set Fu 8 is Star type D. It is
mounted on an antenna foot to the antenna duct 16. The Star antenna D comprises
of a 6 leaf star-shaped steel springs, at the upper end of whip rod. The antenna
duct 16 is mounted in the right rear corner of the fighting compartment. It
consists of an armoured case, mobile antenna foot , the antenna insulator
A, and the Antenna Coil 80/30 W.
Apart from the antenna input lead 16, a mounting plate is used on the side
panel, which allows while stationary, to increase the radio range by stacking
mast tubes and then attaching to them the star antenna, thus increasing range.
Attached at the rear of the vehicle is a storage tube for the star antenna D,
when not in use.
With star antenna D, radio 30 WG a, is connected to the antenna input. This
antenna inlet consists of an insolating tube (mostly made from laminated paper),
with a steel rod in the centre. The aerial connector has bakelite sockets
fitted to both ends.
The antenna coil 80/30 W, has 3 switching position ranges 30 W S.a 3 and is
located at the base of the antenna input 16. The changeover of this coil is made
by the radio operator 1 via remote mechanical control. The lever for the
changeover of the coil is the in a recess on radio operator 1, right side.
Antenna for the radio set Fu 9 20WS d + Ukw E d1).
Antenna 1.4 m rod is an aerial for radio set Fu 7a. It is a removable antenna
mounted on a base in the rear corner of the fighting compartment.
When not in use, the 1.4 m rod antenna is stowed in the tubular storage for the
star antenna D. The radio equipment Fu 7 is connected by the firmly placed
antenna inlet l with the antenna. The antenna inlet l consists of shielded high
frequency cable of 6 m length and is on both sides of the Junction box Pz. NR.2
b and Pz. NR.2. For protection to mechanical parts, it is stowed in a tubular
housing.
Page 7
Antenna for the radio set for Fu 5 (10WSc+ Ukw E e)
5. The 2m mast antenna, is intended for
the radio-equipment Fu 5 and is mounted on the antenna base situated on the
turret’s roof, and can be detached. When not in use, the 2m rod antenna is
stowed in the protective tubing on the right side at the rear.
The radio is firmly connected to the installed antenna input n.
The antenna inlet n consists of high frequency shielded cables 1,5 m long and is
connected at both sides of the junction boxes Pz Nr.10 C and Pz. Nr.2 b. The box
Pz.NR. 10 C, contains a coil for adjustment of antenna to the radio, as well as
a shielding condenser from high voltage surge. The antenna inlet is stowed in
protective cylindrical canisters..
6. For the installation of the Radio equipment (transmitters and
receivers), the suspended supporting brackets are provided. They are fitted with
rubber mountings that serve as flexible suspension for radio equipment. For
lateral fastening of radios, the supporting brackets have snap fasteners. The
grounding of frames is made by a cable that spans the mounting frames.
For the 30 WG A and/or. The 20 WG D is the supporting device P 20 US. It is
attached to the left of the radio operator 1, over the transmission cover.
For the Ukw E d1, the radio equipment Fu 7 uses a supporting device P 20 UE.
Likewise, it is attached over the transmission under the supporting device P 20
US.
When using radio equipment Fu 8 with the Mw E C (receiver), an auxiliary
framework for medium wave receivers is installed in the supporting device P 20
UE. This auxiliary framework consists of a lower and upper framework. It is
stored under the radio operator’s seat. For the 10 WG c and the Ukw E e, the
supporting device P 10 USE is used. It is located in the turret in front of the
loader’s seat and the loader’s access hatch.
7 Power supply
The power supply for radio equipment is supplied by
the main batteries via power converters and transformers.
The accumulators are connected through the main switch NPA line 2X 10 mm˛ to the
junction box Z 23. The junction box contains safety devices for the different
electric circuits and is fitted on tie bar, behind the radio operator.
When stationary, the installed GG 400 protects the main drive accumulators. This
machine is fitted in the rear right recess. The exhaust from the unit is
provided by a pipe connected to the turret roof.
On the outside, this pipe can be locked by a screw. The accessories belonging
to the GG400 (spare parts etc.) are behind the set, in a special storage
container.
Above the set, is a switchbox connected by NPA cable 2X10 mm˛, to the
accumulators' main switch.
The switchbox contains a safety device that allows turning off the GG 400 from
the electrical system. The transformers are firmly mounted to base plates. The
radio operator 1has the transmission transformer U 30 and/or U 20, the base
plate U 20 and for the receiver’s transformer EUa the base plate EUa. The base
plate U 20 is in the recess to the right of radio operator1.
The base plate EUa is installed under the radio operator’s seat. The base plate
U 20a connected by NPA cable 2 X 10mm˛ and the base plate EUa with NPA cable 2 X
1.5 mm˛ and the junction box Z 23.
8. Rotary Converter and turret hook up
12 V power supply for the turret intercom, comes
through a slipring transducer 8 tlg., Ausf.E, from the hull main accumulators.
The NPN cable 2X10mm˛ (Box Z23) and two cables from 6X0.5 mm˛ (intercom boxes),
are connected to the slipring transducer’s stator.
Connected to the rotor part of slipring are 2 cables, one 9-core cable and one
2-core cable firmly attached. The 9-core rubber cable leads to Box Pz.Nr.5c, and
the 2-core cable to an elbow plug.
When turret is removed for maintenance, junction box Pz NR.5C two cables are
disconnected by means of a patch cord with a plug.
In addition, the box has 4 safety devices for the electrical mechanism. The
junction box Pz Nr.5 C as well as the plug is attached at the turret’s rear
wall.
Transformers for receiver and transmitter EU.U10A are mounted on base plate,
near radio operator 2. Base plates are located inside the turret, behind the
supporting bracket, in place of the turret MG. The base plate U10A is connected
by a NPA cable with 2 X 10-mm˛ cable with an elbow plug. The connection of the
EUa base plate, is made with NPA 2 X 1.5 mm˛ cable at the base plate U 10 A.
Page 9
Equipment
Both radio operators
have suitable mounting brackets for radio accessories. The storage is as
follows:
1 Storage covers for transmitter and receiver.
For radio operator #,1 at the forward wall and for radio
operator #2 on the supporting frames P 10 USE.
1 storage for writing pad, for the radio operator
#1 in the niche right, and under the turret roof for radio operator #2.
1 Morse key retractable base, for radio operator #1 on the supporting frame P 10
USE.
1 Bracket for station clock, for radio operator #1 on the forward wall, for
radio operator #2 on the turret’s right side wall.
1 Pencil holder for 4 pencils,
together with 1 container for message forms, for radio operator #1 on the right
side of the seat, with radio operator #2 on the turret’s right side wall.
2 Stowage for five pin plugs, with
both radio operators in close proximity of the supporting frame.
1 retainer for a single jack plug, only with the radio operator #1 next to the
supporting frame P 20 US.
1 container for KA 30a and 1 container for KA 20a
only with radio operator #1 in the right recess.
1 container for KA 30a only with radio operator #2 on the turret’s right wall.
Lastly, in the rear right side recess is 1 box for radio accessories.
Accessory Box for
radio equipment
It contains rods and other spare
parts. In addition, there is a stowage tube located above the driver’s head for
3antenna tubes.
Page 10
II Intercom Arrangement
10. Intercom system for
Pz. Kpfw Tiger and command Tiger has been designated as “Intercom“. It makes
„on-board speaking” possible between commander, Intelligence gathering officer
(acting as gunner), Radio operator #1, Radio operator #2 and driver. The
commander and/or the intelligence-gathering officer can perform this function,
by operating Box 1 and/or, Switch box 2 offering the radio, to radio operator 1
or radio operator 2, automatically operating the radio.
For further communication, a signal light is fitted
into the intercom boxes.
To
the Intercom “B” belong:
Boxes 1 - 11
1 Cable connection, 5-core cable, with insert.
5 Cable connections, 2- core
5 Receivers Dfh.b
5 Throat microphones Kmf.a.
Box 1 and box 2 are
the connection boxes for the commander and intelligence collection officer
(gunner).
They are fitted with connections for receivers and
microphone, push-button with red signal lamp and a change over switch with three
switching positions: „Radio operator #1 “- „Intercom“- „radio operator #2
“.They are located in proximity to the commander
and/or communication officer in the turret.
Box 3 and box 4 are
junction boxes for the radio operator 1 and radio operator 2. They have change
over switch with either switching positions, except receiver microphone
connection with a push-button and red signal lamp also another switch „radio “-
„intercom “. They are directly interconnected with radio-equipment.
The box 5 is commander’s
signal box. It is positioned in commander’s line of sight. Apart of the
push-button, another red and a green signal lamp is inserted.
The box 6 is a junction box for receivers and driver’s microphone. In
addition, it contains a pushbutton for signaling devices.
The junction box is fastened above to the right and
to the back of driver.
Box7, Box 8, Box 9 and
box 10 are junction boxes for the connection of
receiver sockets and the microphone sockets from the transmitters to the
interphone. The connection is made by the loose cable connections.
The box 11 contains
intercom amplifier.
It is a single valve amplifier with valve 12 P
2000. The box contains spare parts and clamp fasteners. For regulation of
volume, there is volume control, and simultaneous circuit breakers.
The box 11 is to the right of radio operator 1, on a
supporting device P 20 US.
The box 11 is shared by receiver transformer providing filament and anode power
through a five- core rubber cable with adaptor.
The connections for individual intercom boxes are provided with aviation
lacquered cable 6x0.5 mm ˛.
Each receiver rack houses radio and microphone.
III. Interference Suppression.
11. Engine’s ignition
system as well as automatic controllers and generator brushes cause interfere
and would make radio reception impossible; therefore,
all power lines to equipment as well as all engine leads are shielded. The
outgoing lines from the generator are fitted with RF chokes and condensers, as
are the lines between generator and equipment. Automatic controllers and
interference suppressors are likewise in screened
cables.
Screened cable is called:
(„Full interference M 9Gruppe 1“). M means the special case for
magneto ignition.
C. Initial Operation and Servicing
1. Initial Operation
12 Location of Radio Fu5 (in the turret for radio operator #2).
The transformers U10a and EUa are firmly secured with wing nuts to
base-plate, located behind supporting frame P10 USE.
The five-core rubber cable is connected to the transformers, and plugged in to10
WG e and Ukw E e at the supporting device P10 USE and then fastened laterally to
the supporting brace. Connections e to radios, transformers and the antenna
inlet are made with the connecting cables. The connecting cables are fastened
with attached straps.
2 m rod antenna is mounted on antenna base that is located on the turret’s roof.
13. Location of Radio Fu7 (Installed to Command Tank Sd
Kfz 268).
20
WSd and Ukw Ed1 are located in two supporting frames and are secured in front by
lateral fastening straps.
The transformers U20a and EUa on two base plates, at the forward radios position
(U20a in the right recess, and EUa under radio operator’s seat) are fastened
down to the base-plates with wing nuts.
Connections between radios, transformers and the antenna inlet ι, are
made with connecting cables. These cables are bound with the fastening belt.
1,4m Rod antenna is mounted on an antenna base, located at the rear side.
14 Details of Radio Fu 8 (In
Command Tank SD Kfz 267)
30 WS. a Transmitter is sandwiched
into the supporting device P20 UE in forward radio operator’s place,
between the supporting unit P20 US, Mw Ec below auxiliary lower part
framework and above medium wave receiver part) and then snapped laterally
with fasteners on the supporting device.
Transformers U30b and EUa are
fastened securely to the base-plates, with butterfly nuts, at the forward radio
operator’s place (U30b in the right recess, EUa under the radio operator seat).
Connections between the radios, Transformers and the antenna line for 30WS are
made with the connecting cable.
The loose connecting cables are fastened with attached
straps.
Star antenna D is mounted on the right side, on the antenna base at connector
16.
15. Machine Type GG 400
(Gasoline Generator 400)
GG 400 equipment is tightly fitted and stored in the turret’s rear right
recess. Connection is made with rubber cables to the electrical system from the
switchbox (pay attention to correct polarity). The exhaust pipe from the
set is firmly attached to the vehicle (tightening nuts firmly, provides full
fumes exhaust.) When using the GG 400, unscrew and removed the exhaust external
cover cap for the outlet exhaust housing,
16. Field manuals.
Details from field manuals for operating the equipment
D 949/2 10 Watts transmitters e
D 988/2 Ultra short wave receiver
D 983/1 20 Watts transmitters
D 984/2 very high frequency receiver d1
D 974/2 30 Watts transmitters A
D 968/2 medium wave receiver e
D 945/1 transformer set U30b
D 910/4 transformer set 20a
D 937/2 transformer set f Eu a 1
D 9000/1 Set GG 400
17. Operating Fu 8 set
(30 WS au 17. Mw Ee)
To operate 30WS A, the transmitter’s range must be set by antenna coil 80/30
setting, which is done by a switch.
The change over switch for the coil is in the recess to the right of the radio
operator #1. When transmitter’s range is set to position II, the antenna coil
change over switch must be also switched to position II.
Operating Radio While Stationary.
Transmission range can be increased either rods screwed to the star antenna D
(do not drive with this antenna screwed in, because the extension mast will
breaks off when hitting an obstacle!) or the star antenna D connected to 3
stacked aerial pipes. The assembled mast tubes are secured on the mounting plate
near the antenna adapter 16 and the star antenna D under the adapter of antenna
head C and the connecting mast pieces. Connection of the antenna with antenna
input to the transmitter is made with 5 m loose cable between antenna head C and
the antenna base lead through 16 in the radio accessory case.
18. Operating on Batteries while stationary.
Using radio equipment while stationary would drain the batteries due to heavy
current consumption. To assists the batteries, a buffer GG 400 (gasoline
generator) is installed. Connection of the exhaust outlet is to be bolted
outside of the vehicle (apart from the antenna duct 16).
Furthermore the switch on the switchbox must be set at proximity of „One“.
Operating of the equipment as per D regulation (CI/2/A).
19. Connecting Headphones
and microphone.
All connections between receiver sockets and junction boxes 7,8, 9 and the
intercom10 B, are made with the free cable.
Afterwards the five core cable is plugged between the box 11 and Mw E c and/or.
Ukw E d1.
The switches at intercom switchboxes 1, 2, 3 and 4 must be in “Internal“
position.
Switch microphone on, for an „internal communication“.
Simultaneous on-board communication is not possible,
so the free cable connection between radio switches
and boxes 7, 8, 9 and intercom’s 10, are plugged in reverse, and can hear
intercom and hum of both receivers.
Yellow dots on radios sockets for headphones and/or microphones, must match with
yellow dot on the plug of the free cable connections and yellow dot on the
sockets of boxes 7,8, 9 and 10 for the intercom.
Operation.
Intercom’s volume is regulated by installed volume
control in box 11.
The following on-board voice capabilities result:
20. Commander and intelligence collection officer
switch on intercom switchbox 1 and 2 to “Intercom“position.
Radio operator #1 and radio operator #2 set
switches to “Radio“, on boxes 3 and 4. Now Radio operator #1 and radio operator
#2 are connected only to the radio and can communicate. Commander, communication
officer and driver are able to „on-board communication “.
21. The commander and/or the intelligence collection
officer wants to monitor radio activity of radio operators #1 or radio operator
#2 or transmission. He switches Intercom switch box into position „radio
operator 1 “and/or. „Radio operator 2 “.He can now hears radio-activity of radio
operator 1 and/or. Radio operator 2 and can transmit.
22. The commander wants to talk to radio operator 1 and/or Radio
operators 2. He communicates by signal lamp fitted into the intercom switchboxes
and switches into position ”Intercom“. In response to light signal, radio
operator 1 and/or radio operator 2, sets the intercom switchbox in position
“Intercom “. The radio operator continues to hear the receiver and at the same
time can talk with the commander and/or. Intelligence collection officer.
23. Radio operator 1 or radio operator 2 wants to talk to the commander
and/or communication officer .He sends light signal and sets the intercom
switchbox to position “Intercom “.When light is on the commander and/or
communication officer sets the intercom switchbox to position “ Intercom“ and
can now speak with the radio operator.
24.
The driver wants to talk to the commander. He presses the pushbutton on intercom
junction box.
The commander’s green signal lamp lights up on box 5. The commander sets
intercom switchbox into position “Intercom” and can now talk to the driver.
25. The commander and/or the communication officer wants to talk to driver.
He sets intercom switchbox into position “Intercom “and can now talk to the
driver.
26. The light signal communication between the
individual crew is set as follows:
Commander..........................Radio Operator 1 : 1 x long.
Commander..........................Radio Operator 2 : 1 x short
Communication officer... .Radio Operator 1 : 2 x long
Communication officer... .Radio Operator 2 : 2 x short
D. Servicing and care
Antennas
27. During storage of the vehicle, or during transportation, antennas are
stowed in respective housings. The antenna base with its protective caps, are
stored in the accessory box for radio.
When radio equipment is not used for a period of time, oxidized contact areas at
the foot of the antenna must to be thoroughly cleaned with water, before using
radio equipment.
Dirt must be removed with water, from the antenna’s insulator and the cover of
antenna lead connector
16
Radios, Transformer and GG 400 set
28. The maintenance and care of radios is referred to
in specified field manuals (C/1/2). Furthermore, attention must be paid to the
GG 400 set, that when not in use, the external exhaust pipe on turret’s roof is
covered, and protected from rain etc.
Intercom
29. The headphones and microphones belonging to the
intercom are to be packed with when not used into the existing rack for
receivers.
Connecting Cable
30. After prolonged period of time
when equipment is not used, attention must be paid the plugs of the connections
cable, by giving them a good polish. Store plugs securely in the upwards
position.
Accumulators
31. Maintenance of the accumulators must be
given special care, since good working of radio depends on good condition of the
accumulators. The accumulators must be checked at short periods. Acid level and
specific gravity must be tested and the accumulators fully charged. Battery
terminals must be kept clean.
Screening
32.
When changing spark plugs and covers, see that they are firmly tightened.
Contact surfaces between spark plug and crankshaft housing must be free from
dirt
and oil. All
spark plug caps must fit securely on crankshaft housing.
E. Testing and Repairs
33. Faults arise with radios and
intercom. Depending on which equipment is faulty,
individual test and repair must be done. If repair of the equipment can not be
done, then it must be exchanged at repair section
1 Radio Equipment
34. The examination and radio
repairs, transformer and the GG 400 set, follow guidelines as set in field
manuals (see number 16)
II.
Antennas
35. Loss of reception
and/or transmission.
Loss of transmission and reception indicates a faulty antenna.
Antenna input must be examined as follows:
Antenna for Fu 5 (10WS e + Ukw E e)
a)
Check whether the
transmitter and/or receiver is in order otherwise exchange it.
b) Check for good
conductivity of rod antenna at the antenna base, also the antenna plug. Remove
any rust or oxide from the plug and polish it.
c) Connect
antenna meter between the 2 m rod antenna and antenna base (Pz).
The measuring instrument of the antenna (Pz) should
indicate at least 0.4 Amp, by pressing
Morse key and tuning the 10WS C, over the entire frequency range.
d)
Examine antenna
input n with a testing set Fu A, for short-circuit and conductivity.
Antenna’s 4 mm plug pin must make good contact with the 5 mm pin.
To examine the
antenna input n, open two junction boxes, exposing individual parts and
individually check items such as rubber cables and high frequency cables coils
and condensers.
36
Antenna for Fu
7 (20WS d + Ukw E d 1)
a)
Examine, whether the transmitter and/or receiver are order, otherwise
exchange faulty equipment.
b) Check for good connection of the 2m mast antenna
at the antenna base and the antenna plug. Remove any rust or oxide on plug and
connectors.
c) Connect antenna tester between 1.4m rod antenna
and antenna base (Pz). By tuning the 20Ws D over the entire frequency range,
with Morse key depressed, the antenna current should read at least .3 Amps.
d)
Examine the antenna input n with test set Fu.a, and look for
short-circuits and conductivity. The 4 mm pin of the antenna plug must have good
connection with the 5 mm
pin. To examine
the antenna input 1, open two junction boxes, exposing individual parts and
individually check items such as rubber cables and high frequency cables.
37. Antenna for Fu 8 (WS a und Mw E c)
a) Examine, whether the
transmitter and/or receiver is in order and if not, exchange the unit.
b) Check
for good connection of the star antenna D on antenna base. Examine the
connecting terminal at both ends of the antenna inlet and the antenna plug.
c)
Examine the connecting cable connections between
antenna input and the 30Wg.a, also between antenna input and the antenna coil
80/30 W.
d)
Attach antenna tester between star antenna D and
antenna base (Pz). Measuring instrument of the antenna tester (Pz.) 30 WG a,
should read over the entire frequency range at least 0,25Amps.
e) Examine Fu A
connection of the antenna input with a testing set. Make sure that antenna input
must not be earthed.
f)
Examine the antenna connector16 with the antenna
coil 80/30 W. First, remove the radio accessory box out of its snap fasteners.
Now the antenna coil and antenna connector16 can be examined unhindered. Pay
particular attention to the connection between antenna coil and antenna
insulator A for deposits of oxide.
III. Power supply
38. Radios
do not work after switching on
a) Examine safety devices in junction
box Z 23. Location of fuses is on the diagram
inside the junction box cover. If a fuse has blown, replace it.
b)
Check if the accumulators are charged. If the accumulators are flat, then
they are to be charged with GG 400 set.
c)
Examine whether power supply is present at the radio, if not, follow the circuit
diagram checking for continuity and tighten connections.
GG
400 Set does not charge
39. a) Check fuses in the
switchbox. If the fuse has blown, replaced it.
b) Check the wiring with circuit diagram and
tighten connections.
c) Check GG 400 Set in accordance with the
guidelines in D 9000/1.
IV.
Intercom
40. In case of interference and defects
in the intercom, proceed as follows ;
a) First, switch on the
intercom without the radio, as described in paragraph 19.
Thus, all loose cable connections between radio and intercom are bypassed.
If no intercom communication is possible, check valve #12 P 2000 in the junction
box #11 and replace it.
b) With the help of the diagram, examine the
wiring and tighten connections.
In particular, examine the connections of the terminals in individual Intercom
boxes (tighten connecting terminals).
c) Check and examine with aid of the diagram,
individual intercom boxes for faults,
such as breaks in line etc.
d)
Intercom communication is possible, but not together with the radio. Check if
the
able connections make good contact. Check continuity and look for short-circuit.
V. Noise suppression
41. Determine whether the radio interference is
caused by nearby vehicles, close by
power lines and such like. If that is not the case, then look for the problem as
follows ;
42.
Interference from the
ignition system is audible with engine idling (crackling
noise), and raises with engine speed and stops, when the ignition key is turned
off.
The fault lies in the screened wire break through bad contact of screened
parts or
break in one of shielded cables,
so replace them.
Magneto housing and shielding hoses are to be tightened . All contact areas must
be
scraped and cleaned from dirt and grease, then contact surfaces should
be s lightly smeared with thin coat of oil, then tightly bolted down. Rubber
mountings
that are tightly bolted together, wear out, and so, if necessary replace them.
Interference from the
generator and its automatic regulators
43. Crackling noise from the
generator and its automatic controller is standard
situation and occurrence, that increases when low engine revolutions are
present and the red charging lamp goes out when revolutions are increased.
In this situation, the generator switches to the electrical system and
interference
increases. These interferences are caused by the automatic regulator, only
at low engine speed, when the red charging lamp lights up.
Examine the following parts and if necessary repair or replace: Generator’s
commentator,
Generator’s brushes
Lubricate cable connections and in particular the female connectors.
The suppressors (chokes and
condensers) are not to be examined with present means,
they could be shorted out and cause severe interference.
Interference
caused by bad contacts
44.
Electrical interference during travel may be caused by bad contacts in the
entire
electrical system. The cause can be found and isolated only by systematic
turning on and off, individual circuits.
Interference from the
drive assembly
45.
In addition, while on the move, interferences increase
through friction pressures
on rubber parts of the drive assembly, under certain terrain conditions.
The noise is heard as squealing and
crackling. It is present only when surfaces are
dried out. This can be rectified by wading through some water (if present) or by
hosing down the track plates and all suspension contact areas.
These incidents are recurrent when terrain conditions are unchanged, such as
dried
soil and dust or driving on public roads.
F.
Specification data
Generally, performance
range can be achieved in average terrain conditions;
46
With the radio set Fu 5 (10WS e and Ukw E e)
3-6 Km Radiotelephone 4-8 km telegraphy.
The range of Very High
Frequency audio depends on the terrain layout. On flat ground indicated ranges
could be doubled.
47 With
the radio set Fu 7 (20WS D and Ukw E D 1)
50 km radiotelephone
range, with radio equipment at 500 m height. By increasing elevation, the
range will increase accordingly.
48 With the
radio set Fu 8 (30WS A and Mw E e)
On
the move
20 km Telegraph 10
km Radiotelephone
While stationary
40 km Telegraphy 20 km Radiotelephone
When using 3 extension
rods with star antenna D
60 km telegraphy 25 km radiotelephone
These ranges vary and depend on the terrain area, time of day and frequency.
Berlin 15. 4. 43 Supreme Army Command.
Army Weapon Group Office for Research and Development
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