Rob, I shouldn't rely on this old memory. Resistor in my phones turns out to be 100 ohms, NOT 100k. Sorry for the brain malfunction!! 73, Don ----- Original Message ----- From: "Rob" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Saturday, July 19, 2003 12:40 PM Subject: Re: [drakelist] TR7A -- 60 Hz Hum in Headphones
> 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/ ----------------------------------------------------------------------
