Codan HF Service Manual Wanted - Using Icom ATU

[Wotname]

Does anyone have a Codan Service Manual for an older Codan HF - 8525S or other Codans of similar vintage (8528 and later etc)?

Failing that, does anyone know the signal levels for pins on the Codan antenna ATU connector of the transceiver (25 pin D connector).

I am planing to use an Icom ATU (AH-3) with the Codan and I have the information for the Icom ATU (it is similar to the AH-4 and AT-130 / 140). I don't have the data for the Codan and it would be way easier if someone already knows rather than me having to reverse engineer whatever Codan designed.

Conversely if someone has already used the combination of a legacy Codan HF with a legacy Icom ATU, please let me know how you interfaced the units.

[Brian.D]

While you are waiting, cut and paste to search. I did see the control interface (3 wires) for the tuner, but no voltage or signal levels.

Codan Obsolete CD/data/tsm/8525 8528/drawings/schematic

or try this - https://docplayer.net/90007601-Hf-ss...-volume-1.html

[PippaB]

The manual for the companion antenna tuner describes the operation somewhat:

https://manuals.repeater-builder.com...4203%20TSM.pdf

The user manual for the 8528 has the pin out and some information on signals for a 15-pin tuner connector:
https://hf-radio.com.au/manuals/Coda...r%20manual.pdf