> In my experience the most common cause of these symptoms isn't feedback > within the modulator itself, but RF rectification somewhere in the audio > chain prior to the gain pot.
I also wanted to add: you can determine if this is the problem by testing the transmitter into a proper dummy load (i.e., not a light bulb, which will radiate to some degree). If the squeal goes away, or if you need to advance the audio gain considerably further for it to appear, it's probably RF rectification that's your problem. -Larry/NE1S ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
