Bowman

H4855 & H4855U

 AN/PRC-343

Personal Role Radio PRR

Integrated Intra Squad Radio IISR

© Brooke Clarke 2006 - 2012

Bowman H4855 PRC-343
                  Personal Role Radio PRR
Pouch, Radio, Antenna, 1 button PTT, Headset

Background
Operation
Antenna
Frequency
Low Probability of Intercept?
Carry Pouch
DC Power
Audio Connection
Tones
Headset
Data Connection
PTT
    Unknown Model PTT
NSNs
12 Contact Radio interface
Single PTT interface 
Dual PTT Interface
Lemo Connectors
Dual Personal Role Radio Set
    Wireless PTT
H4855U "Paint Ball" Radio
    Kenwood Interface
Headset Interface
Vehicle Fit PRR
H4860 Rebroadcast Unit
Maintenance Info
Opening radio case
Patents
Links

Background

Made by SELEX Communications (Marconi is on the label) and used mainly in the UK and by U.S. Marines.  Also by Australia.

There's a need for a short range radio for individual soldiers (intra squad).  There have been a number of different ones (PRC-68 Family,  the PRC-25, PRC-77 might be called inter squad) and this is yet another.  This radio appears to have been designed starting with a clean sheet of paper, a luxury that's not often available when the new radio needs to be compatible with all the older radios going back to the time of the gladiators.  This radio probably will not communicate with any other radio either military or civilian.

Operation

Controls

Bowman H4855 Controls
Chan: 16 Positions (1 shown)

Off/Vol: 5 Positions (Off shown)

Ant: SMAf recessed.

Headset: LEMO 5 pin

Bowman PTT for this radio

Aux PTT: for Combat Radio (CR)

Setting Up

Bowman H4855 Batteries
1. OFF/Vol to Off

2. Connect Headset
    Push headset connector to seat it

3.Insert 2 AA batteries
   (observe polarity markings)

4. Check that Chan is on proper channel

5. connect antenna

6. Switch Vol control on to medium position



Affiliating the Wireless PTT

Bowman H4855 Affiliating Wireless
                PTT
The work PROGRAM on the wireless PTT
is positioned over the bump where the reed switch is located in the PTT module.

1. Start with the OFF/Vol control at OFF.

2. Switch Vol on to a medium volume position.
    Ascending Tones are heard.

3.  Press and hold wireless PTT
     until ascending tones are heard a second time.

4. Release wireless PTT.

5. Note: decending tones heard of affiliating did not work.  If so, repeat steps 1 to 4.

De-Affiliating from the Wireless PTT

Bowman H4855 Affiliating Wireless
                PTT 1. Switch Off.

2. Switch On to medium volume.

3. Without pressing wireless PTT,
     remove and return wireless PTT
     to and from radio 5 times within
     5 seconds of turning on radio.
     Ascending tones heard.


First de-affiliating then Affiliating WPTT.

http://www.youtube.com/watch?v=FzbhupKswmk



Tones

Power on: three short tones if no WPTT is affiliated, or increasing frequency stair step tone if WPTT affiliated.
H4855OnOff.avi
Power off: four medium length tones and one long tone.
Battery Low: four tones alternating in frequency.
Combat Net Radio call waiting: Three medium tones and one long tone repeated every five seconds. (only when a Dual PTT equipped radio)
Wireless PTT affiliation: stair step of eight tones upward in frequency.  Repeated if successful.  Downward sequence of eight tones if failed.
Volume and Channel changes: one beep per step
Turned off by holding PTT while turning on the radio.

To Disable Tones

1. Switch off the radio.
2. While holding down the radio PTT switch turn power on.  Now instead of hearing the tones, the audio will be blanked at the times when the tones would have been heard.

Operation

This is a half duplex radio, i.e. you need to release the PTT switch in order to hear a reply from another station.  Do not press the PTT when another station is transmitting as this will cause interference.

At the 2.4 GHz operating frequency the antenna height above ground is the key factor that determines the range.

The microphone is a noise canceling type so it needs to be positioned so that it touches your lips, not off a inch or more.

Antenna

The radio is designed to be worn on the non shooting shoulder and placed so that the antenna is above the top of the shoulder, thus giving it a good field of view.  This is why the audio cord on the headset is much shorter than those on older larger radios.  The radio uses the very common SMA female panel jack that will mate with SMA male cable ends or the stubby 2.4 GHz antenna.  At 2.4 GHz antenna height above ground has more to do with the range than the RF output power.  The best place would be on top of the helmet of a standing soldier.

I tried to use the higher gain WiFi antenna that's part of the USB-802.11n adapter for the CF-28 Toughbook, but it will not fit the Bowman radio because the O.D. on the SMA (3.0 mm) connector is too large to fit down into the hole on the Bowman radio.

Frequency

Instead of operating in one of the standard military frequency bands this radio operates (2.4 - 2.483) in the 2.4 Ghz Industrial Scientific & Medical  (ISM) bands where no license is needed for secondary users.  This particular band has a Wi-Fi specification, IEEE 802.11, that's commonly used for linking laptops and PDAs to a network.  The 802.11 protocol is used by this radio.  I think that means that no license is required to use this radio in the U.S.  If you know one way or the  other please let me know.

The 16 position channel knob on top of the radio combines with the 16 position rotary switch on the 12 contact face to allow for a total of 256 channels.  No programming of the radio is required.

The top knob is marked with even numbers and dots between them so it can be read as channels 0 to 16 or channels 1 to 15 with no ambiguity.  But redundancy if someone says channel 1 and someone else says channel 16 since they are the same knob position.

Low Probability of Intercept (LPI), Low Probability of Detection (LPD)?

When PTT is first pressed a sequence of tones is heard in the earphone and a WFS-1 Wi-Fi detector shows activity.  But in a few seconds the activity stops (just one radio being used) and the side tone in the headphone no longer matches the spoken voice.  I think this means that the radio was unable to link to another radio and has quit transmitting.  It appears that no linking occurs until the PTT is pressed, which is a good way of doing it.  That way you are not carrying around a beacon to let others know you are around.

At about 100 feet the WFS-1 is still has one LED on so the actual range is probably much more.  The output power is specified as 50 mW.  This means that there's a 100% chance of detection at 100 Feet and maybe longer ranges depending on what's between the transmitting PRR and the WFS-1 Wi-Fi detector.

Carry Pouch

The snap that secures the narrow bungie cords over the top of the radio has a projection that's the tool needed to set the Group number 16 position switch when the PTT is removed.  But how do you loosen the screw holding the PTT to the radio?

The SELEX marked radio does not have the small screwdriver for setting the internal channel group switch.

DC Power

Instead of using a military battery it uses a couple of the very common "AA" batteries that are available about anywhere in the world.  The down side to that is most AA batteries do not work at or near freezing temperatures.  Is there a provision for external DC power to the radio? This would be good for retransmission use.

There may be a reverse connected diode across the battery contacts so if both batteries are installed backwards they will get very hot but the radio will be protected.  A better way is to use a FET switch (see Analog Troubleshooting by Bob A. Pease of National Semi).

DC power can be supplied to the AUX radio connector and then the two AA batteries can be removed from the radio.  This is for the Clansman aux PTT module and might also be the case for the U-229 AUX PTT.

Audio Connection

LEMO  I think the 5 pin headset plug is the FGG.1B.305.KLAD62.  This plug supports: Ground, Mike input, Headphone output and retransmission.  For retransmission all that's needed is a special cable to interconnect the two radios (this is very similar to the PRC-68 family and other mil radios).

Lemo has a USA site.  A mating receptacle might be the EGG.1B.305.KLL (rear nut) or EEG.1B.305.KLL (front nut)
A strain relief for the headset plug might be the FFM.1B.130.LC nut plus GMA.1B  strain sleeve (both of which are not on the stock headset plug but should be.)

The audio connection is on the PTT switch pack, not on the radio proper.  So the 12 contacts on the side carry the aduio connections.

There is a collett on the back of the LEMO connector that needs to match the diameter of the cable.  So when making up LEMO plugs you need to know your cable diameter prior to ordering the connectors.  I'm working on making an audio test box for the 5 pin connector.  I have a query into Belden, but it's being delayed by the Thanksgiving holidays.

Headset

The headset has a single ear piece and attached to it are the 20" cord that connects to the radio and the mike on a flexible boom.  The ear piece has open holes surrounding the speaker element so that you can also hear any ambient sounds.  The mike is of the noise canceling type and so needs to be placed so it touches your lips.  Is is worn with the speaker on the left ear.

Data Connection

One of the PTT switch packs supports data by means of a connector on the attached cable end.  But I now think the Dual PTT U-229 connector also supports data coms.  The sales brochure implies low data rates, not 802.11 Wi-Fi rates.  There's a cable to connect the data port to a PDA.  If you know about this please let me know.  I'm guessing that it's the standard U-229 Data protocol.

There may be a special cable to interface to a Personal Digital Assistant (PDA).

The Bowman radio can be connected to a PLGR or DAGR GPS receiver using the data interface.  A simple application of this would be to send your position either in absolute coordinates or relative to some bulseye location.  A more advanced application would involve sending target or close air support data messages.

Push To Talk

Instead of just using a common PTT switch there are a number of innovative options.  The PTT module screws onto the narrow left side of the radio making contact with a 3x4 (12 ) contacts array.  There are a number of tone signals that let the radio operator know some key status situations.  These can be turned off by holding PTT while turning on the radio.  See above for the tones.

The PTT modules are:
I wonder if there is a garage door opener that would work?  The frequency is the same as used with key fob car remotes and garage door openers and the "learning" process is the same.  I've tried two garage door transmitters and a car key fob transmitter and none of them worked.

Unknown Model PTT

This is probably one of the ones listed above, but which one?  Photos courtesy of Mark Blair.
If you know more about this PTT please let me know.
x
14 pin LEMO Dual PTT vs. Single or Dual PTT
Bowman Dual PTT module with 14 pin Plug
Bowman
                  Dual PTT module with 14 pin Plug
marked:
5930998401824
i.e. NSN: 5930-99-840-1824
D3701882B1


Plug mates with:
Thomson-CSF (Thales) 9100 handheld and 9200 manpack VHF radios

Green - Mic + - Pin A (on clansman connector)
White - Mic - - Pin B
Red - +24 VDC (used in clansman radio system and therefore N/A in H4855) - Pin C
Yellow - Speaker + - Pin D
Blue - Ground - Pin E
Black - PTT - Pin F

info from Lennart who is inHi Lennart Sweden
x
D7401672A1

6 pins in U-229 type connector
x
H274485501
S/W STATE 01
Bowman Dual PTT with 3
                  connectors
Maybe for linking a GPS to the radio?


PRR Vehicle kit PTT
PRR
                  Vehicle kit PTT
Vehicle PRR PTT module
The top LEMO is the standard audio conn.
The bottom LEMO is smaller and is probably for DC power to the radio.  No batteries are used in the radio.

S5002031A1
5930991319201
(NSN 5930-99-131-9201)

NSNs

NSN
Prod #
Description
5820-99-721-8335
Bowman
                Marconi NSN 5820-99-721-8835
P21050000
PRR Body (Green) Complete – English The PRR body  is complete with an antenna and an English user card. Must be used with single or dual push-to-talk (PTT) switch assembly. Requires two AA batteries (included). Infantry use (500m range)
5820-99-739-4033
Bowman
                Single PTT Switch Assembly (Green)
P08130000
Single PTT Switch Assembly (Green) The single PTT switch assembly is for use with the PRR body.
5820-99-342-4097
Dual
                Personal Role Radio Set
P08120000
Remote Wireless PTT (Green)The wireless PTT remotely operates the PRR. Supplied with a black adjustable strap and buckle.
5820-99-127-2911
Bowman Dual
                PTT with 7 pin Clansman cable connector
?
Dual PTT with 7 pin Clansman cable connector

Dual NATO PTT

From Derk: Using with Kenwood amateur radios
PRR

wire
signal
Kenwood
connection
black
PTT
M/3
green
microphone 
M/2
yellow 
earth 
m/3
blue
speaker
m/1

For kenwood connection:
1=tip,
2=middle,
3=base and
M=mini and
m=micro jack


5820-01-531-1752
AN/PRC-343 personal role radio set with:
Radio P21250100 5820-99-721-8355
Single     PTT P08130000 5820-99-739-4033
Wireless PTT P08120000 5820-99-342-4097
Daylight Headset P0814490008  5965-01-533-3341
Boom Mike Adapter P07120000 NSN?
Carry Pouch P30180100  5895-99-991-3095
5820-01-531-1758 (see DPRR below)

P21050041 AN/PRC-343 personal role radio set with:
Radio P210501000  5820-99-721-8335
Dual PTT P08140341  5820-99-666-0452 (<-???, see below)
Wireless PTT P08120000  5820-99-342-4097
Daylight Headset P09255+0009 NSN???
Boom Mike Adapter P07120000 NSN?
Carry Pouch P30180100  5895-99-991-3095
?
?
Single PTT with (detachable?) PDA cable
5820-99-280-7276
P14360408
CT/Light Patrol Headset (Green) – Noise-Canceling (NC) Electret Microphone The vented, single-sided headset has an NC Electret microphone fitted to a flexible boom arm. Fitted with an adjustable headband, the headset can be worn underneath most passive ear defenders.
5965-01-533-3341
Dual
                Personal Role Radio Set
P14490008
CT/Light Patrol Headset (Green) – Noise-Canceling (NC) Electret Microphone The vented, single-sided headset has an NC Electret microphone fitted to a flexible boom arm. Fitted with an adjustable headband, the headset can be worn underneath most passive ear defenders and balistics helmets.
5965-99-664-9722
Dual
                Personal Role Radio Set
P07100000
Nuclear, Biological, or Chemical (NBC) Boom Microphone Adapter The adapter is for use with most Davies headset models. One end fits over theheadset’s boom microphone and the other end plugs into the respirator’s speech module.  See patent 7493899 below
5820-99-425-3999
Bowman
                Carry Pouch (Green) – United Kingdom (UK)
C410114
Carry Pouch (Green) – United Kingdom (UK) Pattern Disruptive Pattern Material (DPM) The PRR fits inside a heavy-duty polyurethane, textured nylon pouch that attaches to webbing and helps protect the PRR from harsh conditions/impact.
5895-99-991-3095
Dual
                Personal Role Radio Set

Carry Pouch (Green) - U.S. Molle
5985-99-664-9730
Bowman
                Antenna

Antenna
5820-01-533-3406
Bowman
                Battery Doors

Battery Door

The two doors shown are aftermarket made by Dragondark.
5820-01-533-3652

Strap & Buckle for Wireless PTT
5820-99-666-0452
Bowman Dual
                PTT with 6 pin NATO Audio connector



12 Contact Radio interface

March 2012
Contact
Function
1
Mircrphone In
2
?
3
Speaker Out
4
+Vout
5
Ground
6
Push To Talk
7
Busy pips (active low)
8
?
9
Reset (Active low)
10
RxD (CMOS 3V URAT In)
11
TxD (CMOS 3V URAT Out)
12
Single/Dual PTT select (0=Single, 1=Dual) or (Open Squelch / PTT)

The mode / SQ  pin . On UK MOD sets that have been modified (1) . on a dual
ptt you get a hi/low tone on TX  in your
headphone that repeats every five seconds ...
it can be stopped by taking the mode pin the ground via a 10k resistor.
This only happens on a later set and with a dual ptt
---Ian---

Oct 2011 - newer pinout info from Eero: H4855 module connector 

This 12 contact field contains the signals needed for the headset (mike, speaker and PTT) , for data coms (Tx data, Rx data and maybe Tx clock and Rx clock), for retransmission (PTT and Squelch) and probably some test modes and external DC power.  If you have info please let me know.

Summary:

1
2
3
4
5
6
7
8
9
10
11
12
Mike
PTT
Spkr
+Vout
Gnd
PTT


RxD
TxD
PTTsel

It sure would make it easier to have a pair of working radios.
Looking at the connector the top row (nearest the on-Vol control) is numbered left to right 1, 2, 3, 4 and the center row 5, 6, 7 ,8 and the bottom row 9, 10, 11 & 12.
First probing Voltage all combinations with the radio turned off.
Black test lead on Fluke 87 DMM for left coulmn and Red test leat for top row.
B R->
V
1
M
2
P
3
S
4
5
G
6
7
8
9
10
11
12
1 mike
x











2 PTT
x
x










3 Spkr
x
x
x









4
x
x
x
x








5 Gnd
x
x
x
x
x


.044




6
x
x
x
x
x
x

.044




7
x
x
x
x
x
x
x
.044




8
x
x
x
x
x
x
x
x
.044



9
x
x
x
x
x
x
x
x
x



10
x
x
x
x
x
x
x
x
x
x


11
x
x
x
x
x
x
x
x
x
x
x

12
x
x
x
x
x
x
x
x
x
x
x
x
x - no point in testing the same thing two times or the same contact.

Now probing with the On-Vol at full volume:
B R->
V
1
Mik
2
PTT
3
Spk
4
5
Gnd
Bat -
6
7
8
9
10
11
12
1 Mike
X








.040
0.3
cap
2 PTT
X
X

.054
.051.
.050
.051

.052
.05
.05
cap
3 Spkr
X
X
X
2.2
.77
2.0
1.96
cap
1.9.
1.8
1.8
cap
4
X
X
X
X
-2.968

-.01
-2.915



-2.967
5 Bat-
GND
X
X
X
X
X
+2.594
.05
+2.963
+2.938
+2.963

6
X
X
X
X
X
X
-.006
-2.907



-2.959
7
X
X
X
X
X
X
X
-2.901




8
X
X
X
X
X
X
X
X
+2.910
+2.885
+2.91
-.048
9
X
X
X
X
X
X
X
X
X


-2.962
10
X
X
X
X
X
X
X
X
X
X

-2.936
11
X
X
X
X
X
X
X
X
X
X
X
-2.962
12
X
X
X
X
X
X
X
X
X
X
X
X
Note that a voltage of 2.9xxx volts is the full battery voltage from 2 Alkaline batteries or after a FET type switch.

Single PTT interface

Radio On max vol
Radio Audio Connector numbered 1 to 5 clockwise looking into the PTT jack with 1 at the notch.
The headset only has the noise canceling mike and earphone (no PTT switch)
The PTT button is between contact numbers 2 & 5
Ohms LEMO connector to 12 contacts
B R->
V
1
Mike

2
Gnd
3
Gnd

4
Spkr
5
?
1 Mike
0




2 PTT





3 Spkr



0
4





5  Gnd

0 0


6





7





8





9





10





11





12





Dual PTT Interface

The opened Dual PTT is marked:
D40014201, H204485601, Patent Pending.
It the cut cable has 6 wires (plus ground) colored blue, green, red, yellow, black and a white wire wrapped with bare wire (coax).

Bowman Dual PTT Opened

From an Airsoft web page, but I think they have it close but there's more to it.  For example the Blue wire seems to be the true ground.

Black: Gnd (PTT)
PTT: White (PTT)
Speaker+: Orange
Speaker-: Blue
Mike: Green
Mike (power?): Red


Bowman Dual PTT Opened
The green & white wires are shielded.

The white RTV is surrounding the reed switch that's under the hump between the two PTT buttons.

There are 12 SMT caps at the top right of the top PCB (next to the notch in the flex circuit) and the center ends of all of them connect to the blue (gnd) wire.
Bowman Dual PTT Opened
Blue dots are connected to the blue PTT cord wire (looks like ground).  Red dot connected to red PTT cord wire.

IC is marked LM293
Bowman Dual PTT Opened
Blue dots are connected to the blue PTT cord wire (looks like ground).

Top IC is marked HC02A
Bottom IC is marked HC14A

The three 5 lead SOT-23 packages are marked "AAA".
Bowman Dual PTT Opened
Blue dots are connected to the blue PTT cord wire (looks like ground).

The IC on the back of the 12 contact PCB is marked MAX4167.

DPTT Interconnection Table

2nd Radio Cable
(PCB order)
Radio
I/F



Black
?


Blue
6, 8
DC Gnd & Speaker Return


Yellow (orange)

Speaker Audio


Red
Mike DC power


White (shielded)
2nd Radio PTT


Green (shielded)
Mike Audio



3
top (Radio) PTT


Lemo Connectors

These are what's called push on pull off.  No rotation of the connector is needed to install or remove the plug.

Bowman
                Lemo male & female connectors

x
EGG.1B.305.CLL                             FGG.1B.305.CLAD62

Headset Interface

Shown above is the 5 pin LEMO headset connector.  In normal operation this connector only carries mike and speaker audio.  But when the retransmission cable is connected it also needs to carry a PTT signal to key the radio and a squelch signal.  In the U-229 type connector this takes a total of 6 wires.  So it's still a mystry how the retransmission works using only the 5 pin connector.  Most likley pin 5 carries a digital signal as a bus.  For example by using a pull up resistor the line is held high and when squelch closes (a signal is being received) that radio puls the line low, but that's just a guess.
H4855U Top Connectors
The H4855U has a red mark on the LEMO connector and I'm assuming it's pin # 1.

Dual Personal Role Radio Set

Got this from Mike Murphy (8 Apr 2010) new in the box

The inner box is marked:
5820-01-531-1758
CAGE 37EK0
PN  P21060041
DUAL PERDONAL ROLE RADIO SET
1 EA
SPM7A3-07-F-0002
GS35F0348S
M31-7/07

Contents 5 palstic bags:
Dual Personal Role Radio Set
SELEX Radio Set 5820-01-531-1758
Radio 5820-99-721-8335
Dual PTT (H204485601, D40883601) w/GC329 connector attached,
Antenna,
two AA cells,
card marked "Integrated Squad Radio Operator's Guide
card marked Integrated Intra Squad Radio Fitting of Reppirator Adaptor & Tube
Dual Personal Role Radio Set
Headset (P1449008)  NSN 5965-01-533-3341

Wireless PTT

Dual
                Personal Role Radio Set
Remote PTT (5820-99-342-4097, P0812000)  (bag marked use by 01/01/17


Bowman Wireless PTT spectrum
Bowman Wireless PTT spectrum HP 4395A
433 MHz Tx frequency
Dual Personal Role Radio Set
Universal Carry Pouch - ALICE or Molle
Dual Personal Role Radio Set
Gas Mask Adapter
Dual Personal Role Radio Internal
                Channel Switch
Dual Personal Role Radio Internal Channel Switch set to Channel 0

H4855U "Paint Ball" Replica Radio

Note that this radio is marked H4855U, i.e. it's a UHF radio.
At the time of purchase I thought this was a "Replica" Bowman radio used for Paint Ball gaming.  But when received, it's looks like a real UHF frequency Bowman radio Set.  There's a small chance it's a replica with ham radio internal circuitry.  When searching the NSNs printed on the various parts, none of them show up on Google, so maybe it's a replica?

It operates on 16 channels in the 440 MHz band.  Behind the Single PTT module there are two DIP switches instead of the 16 position rotary switch that's on the 2.4 GHz H4855 radios.

I tried to use the radio with a couple of Alkaline AA cells, but it's not working.  The supplied batteries are 14500 size Li-Ion cells (3.6 Volts nominal, 900 mAh) and came with a charger.  This radio needs the higher voltage it will NOT work with Alkaline AA batteries, that seems strange, was it a mistake or what?

When the radio it turned on you hear "Open to Radio xx" where xx is the channel number.  The headset is interchangable with the other Bowman headsets.

The data sheet shows a programming cable in the first column forth down connecting the radio LEMO connector to a laptop (USB or Serial?).

H4855U Set

x

H4855U Max Hold Spectrum from chan 1 and chan 16 (made with HP 4395A)
H4855U Max
                Hold Spectrum from chan 1 and chan 16 (made with HP
                4395A)
The display spectrum correlates with the data sheet that shows 440.050 for Chan 1 and 440.800 for chan 16 (i.e. 50 kHz chan spacing).  This was done with the two DIP switched off.
H4855U & Single PTT
H4588U Radio
5820-99-721-7655
Mod Record: 1, 4, 16







Single PTT
5820-99-127-0957
Have not tested to see if it works with a real radio, but suspect that it will.
H4855U Headset
Headset
5965-99-280-7276

This has a real LEMO connector and is form, fit and function interchangable with the real headset.
H4855U Wireless PTT
Wireless PTT
5820-99-342-4097

DIP switch #2 (under the single PTT) turns on or off the wireless PTT.  There does not seem to be an affiliate function like on the 2.4 Ghz radios.  But PROGRAM appears on the unit, strange.

Works on a different frequency than the real wireless PTT and so will NOT work with a real radio.
H4855U Wireless PTT spectrum The wireless PTT operates at 315 Mhz not the 433 MHz that's used for the 2.4 Ghz radios.  That's probably to seperate the PTT frequency from the radio frequency.
H4855U Carry Pouch

Set #2 came without batteries and charger so can not be powered up until I get a couple of the special batteries (3.6 V 900 hAh).
H4855U Set
                w/o Batteries & Charger
H4855U Kenwood stock programming
                cable
Kenwood stock programming cable
The hope is to modify this cable to work with the H4855U.
H4855U Kenwood stock programming
                cable Plug
Kenwood stock programming cable Plug
The hope is to identify the function of the plug contacts then after cutting the plugs off link the function to wire colors.
Kenwood Interface
Kenwood
                TH-F6 Data Interface pinout
Kenwood TH-F6 Data Interface pinout from the owner's manual page 45.

It's probable that the data interface for programming is the same.
The programming cable only has three wires: Red, Black and White.

This is my best guess asto how to make a programming cable.

Pgm
Cable
Dual
Plug
LEMO
Radio
12 term
Function
Red
DCD In
1
4
Mike
Black
Gnd
2, 3
9
Gnd
White
PTT
4
8
Spkr
na
?
5
-
?


Note: there are pull up resistors to +3.5 V on the DCD and PTT lines.  Myabe in the 1k to 3.3k Ohm range.

The wiring is based on cutting a cable sold on eBay as a Kenwood programming cable, i.e. that's why the wire color and DCD, Gnd & PTT connections.

Vehicle Fit PRR

PRR Vehicle Fit Kit

This is a setup used in the UK to integrate the Bowman radio into their vehicle audio system similar to our VIC system.

Clansman/PRR Switch Box


Clansman/PRR
                  Switch Box The red rectangular component is a power supply.
marked: Traco Power
In: 9-36 V Out: 3.3V 900 ma
Ten 4-2410

The silver rectasngular component is an Eisen audio transformer marked:
A262A7E
Audio
Tel (01993)886200

The box is a Hammond 1590-NI
Clansman/PRR
                  Switch Box PCB
On the bottom of the PCB there are a bunch of 1 uF caps and an 8 lead IC marked: 33171  PZGL which is a low power Op Amp
Clansman/PRR
                  Switch Box PCB
The Traco Power module supplies +3.3 V to power the radio.

The Transformer is wired:
Winding
Switch=PRR
Switch=Other
A1
PLA-B

A2
10 uF to A3

A3
10 uF to A2

A4
PLA-A
B1
90 Ohms to Gnd

B2=B3


B4
Gnd




The black box has the following Controls, Indicators and Connectors.


Cable Box - end Connector - end
Label

Cable Labels

Cable Wires
Conn

Conn - Pins
CLANS/PRR
(Other/CLANSman)/PRR


3PDT switch
9 white wires

PLA
7 male pin cir conn (capped)

A:
B:
C:
D:
E:
F:
G: lemo-2
GB 62GB-57A10-7PE
5 white wires

PLB
2 male pin conn
DC Supply
ska & DC Power
GB 62GB 51T10-2PC TCX
note 1
2 pins
Brown
Blue



A: +24V
B: Gnd
SKC
2 female scokets
DC to Vehicle Radio
DC Supply & +28V
GB 62GB56T10-2SC TCX
note 1
2 sockets
Brown
Blue



A: +24V
B: Gnd
Harness
Output
HO LEMO jack (same as on radio)
Clansman/PRR
                  Switch Box 5-socket LEMO Jack
LEMO p/n: HMG.1B
936-155/01
- harness output
1:
2: PLA-G
3:
4: Gnd
5:
[PU]APH 0613 62GB-56T10-07SE
7 sockets
flex circuit




A:
B:
C:
D:
E: PLA-E
F:
G: PLA-G


na
attached cable - LEMO plug (radio Audio)
936-1540/01
Clansman/PRR
                  Switch Box 5-pint LEMO Plug


(red dot on shell) red
blue
yellow
green
white
black
1
2: Gnd
3: Gnd
4:
5
6: nc
na
attached cable - small 6 pin LEMO to Vech PTT module (PS)
936-1541/01
Note 2



red
blue
note 1: these two connectors mate with each other.  This appears to be a daisy chain DC power system similar to the VIC DC system.
Note 2: the small 6 pin LEMO connector does not fit the PSG-9 Message Terminal external Power jack J2. But the core of this plug does fit J2.  What is the correct LEMO plug for J2, let me know.

Documents

Pocket Card - Vehicle Fit Personal Role Radio (PRR) Operator's Guide 739-0042/01 Issue 2 Jul 05

Operation with US VIC Equipment

In order to do this requires figuring out:
The pin out of the 7 pin 56T10-07SE connector as well as the polarity of the DC input connector.  The signal levels may or may not be compatible with the VIC system.
It would be good to know the wiring of the Vech PTT module and the input voltage levels (probably 3.3 VDC from the Traco DC-DC module, i.e. 2 AA Batteries)  that it accepts.

H4860 Rebroadcast Unit

The rebroadcst unit is configured in a saddlebag arrangement with a radio system in each of the two bags and with an interconnecting cable.  The interconnecting cable carries digital Tx and digital Rx audio, not analog audio.  Although the details are not really clear RF filters are used, one passes channels 1 to 4 and the other passes channels 13 to 16 (channels 5 through 12 are not used providing for the filter skirts).  Any group number can be used.  It would seem that one of the saddle bags would be for the low channel numbers and the other for the high channel numbers.  The filters have a little less than 3 dB attenuation in their pass bands.

There are "switch packs" which may be in the form of PTT units that connect to stock radios.  The LEMO connector on the switch packs are interconnected with a cross over cable the interconnects the Tx digital audio of one ratio to the Rx digital audio input of the other radio.

Maintenance Info

There are a number of surplus radios being sold by the MOD in the UK.  These have been stripped of the knobs antenna and PTT switch and maybe even the battery compartment door, i.e. just a very raw radio.  They probably do not work and being sealed have been rejected rather than repaired.  It's probable that you could saw them open and with a number of them make one good radio.

Coming shortly.  For now you can use the above tables of resistnace and voltage.

Opening Radio Case

1. The part line is clearly visable.  The two case halves are glued toghther, but not by fusing the plastic.  So using a few light blows from a 2.5 pound Dead Blow Hammer (Harbor Freight 33905) a "crack" is heard then with a screw driver the lid can be seperated from the main radio body.  DO NOT hit or set the radio on the PTT interface during this process as that will damage the interface PCB (guess how I know this).
2. Disconnect the connector then remove the RF can top lid.
3. Bend the 4 tabs to allow the digital board to be lifted.  Note there are two holes in the board that can be used to lift it.
4. Use a 5/16" socket or nut driver with an OD less than 0.447".  The 5/16" Craftsman deep 1/4" drive socket (set 934421) has an OD of 0.445'.  This unit has double sided tape on the bottom of the can, but it was not sticking.  You may need to use pliers to pull the can up after taking off the nut and lock washer.  Remove the RF shield can bottom lid.  The RF board is soldered to the shield can.
5. The remaining chassis contains the battery contacts, flex circiut and plug ans well as the two switches.

Lid Removed
Conn up and Shield
                  removed
Digital Board
                  removed
RF Can
1. Lid Removed
2. Connector lifted & Shield removed.
Lines to tabs.
3. Tabs bent &
Digital board top removed from radio
4. Remove SMA nut
&  can from chassis
RF Top
RF bottom
Digital bottom
Box, flex ckt
4. Top of RF board
4. Bottom of RF board
3. Digital board bottom
5. Box & flex ckt w/ switches

ICs

Atmel AT90S8515 - 8 bit Micro Controller w/ 8K bytes of flash memory, 32 IO lines, 44 pin TQFP
AMI WavePlex 0034LQM SX043T - ?
WavePlex 0108LDH SX061T - ?
CML CMX639E2 43265 - CVSD Digital Voice Codec
4168 EUB - Maxim High-Output-Drive, Precision, Low-Power, Single-Supply, Rail-to-Rail I/O Op Amps with Shutdown (speaker driver)
HC74  E1052 - ?
EM09AB LMV824  MT - Shantou stars Electronics Co Ltd   SOP-20 - ?
DS1844 100 9939A1 134AA - Maxium Quad Digital Pot 100k Ohm
P12AF LCX125 - 14 pins - Low Voltage Quad Buffer with 5V Tolerant Inputs and Outputs
P14AJ LCX257 - 16 pins - Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs
P14AJ LCX257 - 16 pins - Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs
MAX1705  EEE  0124 - high-efficiency, low-noise, step-up DC-DC converters with an auxiliary linear-regulator output (3v in - 5V out)
LMV822 -  NSC Low Voltage, Low Power, RRO, 5 MHz Dual Op Amps

Board Connectors

AMP Fine Pitch SMT Stacking Connectors (Parallel Board-to-Board) 0.8 mm pitch

2x30 connector - Digital board to Chassis via flex circuit (many grounds)
2x20 connector Digital board to Analog board.
Right Angle SMA-f on Analog board

Patents

7493899 Microphone adaptor for a respirator, John Davies (Selex Comunications), Feb 24, 2009, 128/201.19 ; 128/202.27; 381/361; 381/367; 381/386; 381/390

Links

Selex Communications - Personal Role Radio - Infantry Soldier Situational Awareness Tool -
Selex Comms USA - links to the above web page for details
AN/PRC-343 aka H4855 aka PRR Information and Accessories   

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