Ic-730 Audio Problem | Audio-Digital.net

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IC-730 Repair | QRZ Forums

https://forums.qrz.com/index.php?threads/ic-730-repair.356127/#:~:text=The%20seemingly%20universal%20problem%20with%20the,IC-730%20are%20the%20pre-amp%20and%20TX%2FRX%20relay.

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Icom 730 receive audio | QRZ Forums

https://forums.qrz.com/index.php?threads/icom-730-receive-audio.679928/

I have an IC-730 that was given to me several years ago and I used it as my main rig for a number of years. I eventually replaced it with a 7410 and it has been sitting on the shelf. I brought it down recently to check out and make sure its all still working ok but was reminded of the puny audio output level now that I have become accustomed to ...

Icom - IC-730 service manual

http://www.radiomanual.info/schemi/ICOM_HF/IC-730_serv.pdf

controls the input DC power to the IC-730. When the external AC power supply (lC-PS15) is used, the switch also acts as the AC power supply switch. When the switch is pushed in and locked, power is supplied to the set. When the switch is pushed again and released, power is cut to all circuits except the PA unit.

IC-730 - QSL.net

https://www.qsl.net/icom/oldicomfaq/ic-730.html

Preventative Maintenance for the ICOM IC-730 The information on this page is subject to the terms and conditions set forth on the ICOM America Service FAQ Index page. Though the IC-730 is a good-performing, reliable radio, many of these units have been in service for a number years and are beginning to show their age.

Icom – F6HOY

http://www.f6hoy.com/icom/

If none of the above are causing the problem, then most likely the drivers or PA final transistors are bad. Remarks: If Q5 transistor on the RF unit is a 2SC945, it should be replaced with a 2SC2878B. Links and PDF: IC-730_eight_mods_1985. IC-730_second_IF_filter_failure. IC-730_relay_fix. IC-730_troubleshooting_guide. IC-730_options_installation

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