I powered up my BitX 40 today and there was a small pop and then a buzz/hum started from the speaker. It's quite loud when the AF gain is cranked.
Also, the dreaded low power hit me again.This time all connections are ok as far as I can tell as I haven't had the radio apart and it worked perfectly last week. I checked the resistance on R141 as a previous post suggested this and it shows 10 ohms exactly. Is this correct?
I have some spare IRF510's. Is there a reading I can take on this?
cheers, Phil, VK8VWA