My Drake TR-4 transceiver goes into loud oscillation now if I turn the volume control above minimum level. It will receive at minimum level and load antenna. Also, when I switch the bandswitch or transmit, a loud high-pitched oscillation begins.
Any troubleshooting advice would be greatly appreciated.
Best Regards,
Larry-AB5AA
Any troubleshooting advice would be greatly appreciated.
Best Regards,
Larry-AB5AA