Don, Many thanks for the reply. I am really happy that this hum is not a big problem at all! I will install a 100 k resisitor on the hot lead of the headphones and pray it works. I am sure it will!
73's Rob >From: "Don and Diana Cunningham" >To: "Rob" , >Subject: Re: [drakelist] TR7A -- 60 Hz Hum in Headphones >Date: Fri, 18 Jul 2003 19:12:23 -0500 > > >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" >To: >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/ >---------------------------------------------------------------------- ---------------------------------------------------------------------- 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/ ----------------------------------------------------------------------
