Rob, Drake put a resistor in series with the "hot" lead on the headphone. My old memory says it was a 100k, 1/4 watt, but think the exact remedy is listed on the Drakelist Home Page. It's really that simple! 73, Don, WB5HAK ----- Original Message ----- From: "Rob" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, July 18, 2003 5:42 PM Subject: [drakelist] TR7A -- 60 Hz Hum in Headphones
> > I just acquired a TR7A. It works great. Listening to the speaker, the > receiver sounds great and I have been getting great audio quality reports on > my SSB transmissions. > > However, I do hear a pretty noticeable 60 Hz hum when I use my headphones. > (I don't notice the hum in the speaker even when the volume is turned way > down -- I only hear the hum when I use headphones). > > Is this normal for a TR7A? If not, where should I look to track down the > problem? The power supply? A blocking cap in the audio section? > > I could always use an external 60 Hz hum audio filter but I would prefer to > find the source of the problem. > > 73's > Rob > > > ---------------------------------------------------------------------- > Submissions: [EMAIL PROTECTED] > Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body > Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body > Hopelessly Lost: [EMAIL PROTECTED] - help in body of message > Brought to you courtesy of TLCHost.net http://www.tlchost.net/ > ---------------------------------------------------------------------- > ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
