Codan 8525-S

The 8525S marine transceiver offers the mariner a versatile communications package incorporating the latest concepts in design technology and manufacturing reliability. Featuring synthesised generation of channel frequencies, the transceiver includes programmed (EPROM) control of the operating functions and channel selection to a capacity of 99 single or two-frequency simplex channels. All front panel functions are operated by membrane switches— conventional switches and knobs have been eliminated to produce a design that has a clean, streamlined appearance.

A radiotelephone alarm call signal generator (Emergency call) which complies to both international and Australian specifications, is fitted as standard.

For those vessels where it would be an advantage to have extended, all function control of the transceiver operations, the type 85305 control head is available for connection to the 8525S and is supplied complete with 6 metres of interface cable.

The transceiver is designed for 12 volts DC operation: for 24 volt installations a recommended DC-DC converter unit is available through Codan dealers or direct from Codan.

The 85255 in common with all Codan products, has been designed and developed in Australia.

Codan is the largest Australian-owned and operated manufacturer of HF SSB communications equipment and has achieved world-wide recognition with exports to more than 70 countries.

Standard frequency program The transceiver is normally supplied pre­programmed with a set of commonly used frequencies for operation into the distress and safety services, radiotelephone (RADFONE), professional fishing service, and local-international calling/working networks. Programs are available for Australian waters, the south-west Pacific and other geographical areas.


A receiver scanning facility is provided as standard. This facility, which can be programmed by the user, provides for a maximum of 15 selected channels to be scanned in sequence over a 15 second period. If required, a user can select ‘priority’ channels by programming the same channels more than once within the total scanning period.

Frequency range

1.6 to 2 MHz—receive only (option LF)

2 to 18 MHz—transmit and receive 

Channel capacity

99. Any combination of single or two-frequency simplex


Operating mode

Single sideband (J3E; USB). On 2182 kHz

compatible AM (H3E) is automatic but J3E

(USB) may be manually selected

Transmitted power output

125 watts (PEP)


Power On/Off, Tune, Power - Hi/Lo, Mute

On/Off, Clarifier up (~), Clarifier down (~),

Channel up (a), Channel down (~), Volume

up (a), Volume down (~1~ Scan, AM Mode,

2182 select, Emergency Call - Test’,

Emergency Call - Call’ Indicators

Mute On/Off, transmit (Tx), Power - H i/Lo, Scan, AM Mode-2182 selected Display indication

Channel number

Primary voltage

12V DC nominal, negative ground. Reverse

polarity and over-voltage protected

(24V working with separate DC-DC converter)

Primary power

Receive (no signal): 0.5A

Transmit J3E average: 3A

J3E two tone: 8to 12A

Size and weight

8525S transceiver

270 mm W x 350 mm D x 90 mm H; 3.8 kg

(includes mounting cradle and rear


8530S control head

190mm W x 70mm D x 78mm H; 1 kg

(includes mounting bracket)


Case:   Textured silver-grey

Panel:  Lexan - matt black

Accessories (standard)

Hand PTT microphone, DC power cord (6 metres), mounting bracket, operating instruction card, installation handbook and standard frequency package


Equipment descriptions and specifications are subject to change without notice or obligation.



The antenna system may be either long wire or whip.

Depending on the vessel design and available space, either single or twin antennas can be used with the antenna tuners type 4203 and type 8560 to cover the entire operating frequency range of the transceiver. Single antenna systems may consist of an unloaded whip or an end-fed long wire: dual antenna systems comprise two whips - one tuned, the other untuned.

For the automatic antenna tuner type 4203 single antenna installation the length of the unloaded whip should be 8.5 metres: the end-fed long wire has a minimum length of 8.5 metres and a maximum length of

13 metres.

For the manual antenna tuner type 8560 single antenna installation the recommended length of the unloaded whip is 5.5 metres: the length of the end-fed long wire remains the same as that used for type 4203.

Dual antenna operation comprising loaded and unloaded whips with a minimum length of 5.5 metres may be used with both tuners. Important: Antennas are critical to the performance of the communication system. It is, therefore, essential that advice is sought from your local dealer or Codan.


Antenna tuner type 4203 is fully automatic requiring the operator only to press a pad on the transceiver to achieve correct tuning for the channel selected.

The tuner automatically matches end-fed long wire antennas and a variety of loaded or unloaded whips into the 50 ohm output of the transceiver. Antennas may be operated in single or dual antenna configuration with the tuner installed some distance from the transceiver.

The type 4203 does not require technician pre-programming: during installation it is only necessary to pre-select the correct operating antenna (antenna 1 - antenna 2) to ensure the tuner automatically selects the antenna appropriate to the frequency in use. Housed in a rugged splashproof PVC case, the tuner is supplied with a mounting bracket, 10 metres of coaxial and control interface cable, and an installation and operation handbook.

Antenna tuner type 8560 is a manually-operated unit designed for use in those installations where the transceiver is located physically close to the antenna(s), and where the operator prefers to control antenna tuning. The tuner has provision to match end-fed long wire antennas and a variety of loaded or unloaded whips into the 50 ohm output of the transceiver, which may be operated in either single or dual antenna configuration - as selected.

A logging scale is provided to record the operating control settings obtained during initial tuning, thus making re-adjustment simple and rapid when changing channels. Antenna tuning is indicated by the panel mounted meter.

The tuner is housed in a rugged alloy case and is supplied with a mounting bracket, 2 metres of coaxial interface cable, and a copy of the handbook.


An effective earth system is essential for the correct operation of both the 4203 and 8560 antenna tuners, with the location and installation of hardware depending on the vessel design and construction materials. The accessory codes 155 and 157 grounding devices connected to the equipment with copper strip (code 705) should cover most installations.


Antenna tuners - general specification

Channel capacity


Power rating

125W PEP - type 8560

400W PEP - type 4203

Power requirements - type 4203 only

1 2V DC (nominal) at 1 .5A supplied from the


Input impedance

50 ohms, unbalanced

Input socket

UHF coaxial

Output terminals

Antenna 1, Antenna 2 and Earth

Size and weight

Automatic antenna tuner type 4203

320mm W x 240mm H x 210mm D; 5.5 kg

Manual antenna tuner type 8560

240 mm W x 120 mm H x 195 mm D; 1 .5 kg

(includes mounting cradle and rear panel



BD        Program additional channels (specify frequencies)

L           Fit for LSB operation (permitted channels only)

LF         Fit for 1 .6 to 2 MHz receive only operation

M          Fit CW facility

PH        Fit headphone output

PS         Fit selective call interface

H           Fit extended/remote control interface


Accessory Code


155        *Dynaplate’ grounding device

157        E-plate (radio earth plate) for fibreglass or wooden vessels

602        Headphone complete with cable and connector

640        Telephone handset complete with cable and connector

641        Desk microphone complete with cable and connector

649        Extension loudspeaker

650        Extension loudspeaker with in-built amplifier (12V DC operation)

*651      Programmer/computer with EPROM writer cartridge and Codan plug-in

    8525 series software package

652        Morse key complete with base, cable and connector

705        Copper earth strip 50 mm x 0.46 mm (26 gauge) for connecting transceiver to ‘dynaplate’ or E-plate

2020      Service manual for type 8525 series


Type      Control head complete with 6 metres of

8530B    interface cable fitted with connectors

    and hand PTT Microphone

              DC-DC converter (24 to 12 volts operation) - REDARC model VRT2OS Dealer item only.


Distributed by:


NOTE:- very similar to the 8525B always check serial number plate.The serial number will either end in a "A" or "B".


                                              Rare 8525-S Marine