Re: [Elecraft] KX3 Backlight color will remain amber
The use of red light in darkrooms, went out many decades ago with the introduction of pantographic film emulsions that were sensitive to all colors. Orthographic film as used in the early days of photography were 'blind' to red light, hence the use of red in the darkroom. For over 50 years, darkroom 'safe lights' have been yellow-amber. Safe lights are used so we can see, but the color is chosen to make it a color that the film doesn't see. Its not necessarily best for our vision, just best for the film or other light sensitive material. I've heard that night lighting inside submarines is blue to protect the eyes for those that are transitioning from inside to outside. ...bill nr4c -Original Message- From: Ron D'Eau Claire [mailto:r...@cobi.biz] Sent: Monday, September 23, 2013 8:48 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 Backlight color will remain amber Also, human vision has the lowest acuity in the red region. That is, we see less detail in red illumination. 73, Ron AC7AC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Backlight color will remain amber
Also, human vision has the lowest acuity in the red region. That is, we see less detail in red illumination. 73, Ron AC7AC -Original Message- FYI, if you're going to do as Wayne suggests and just turn the display off aiming a light at it (saving battery drain also) red is NOT the color that best enhances night vision if that matters to you. It's actually a shade of green often referred to as "traffic light green" or if you think of what's seen through night-vision devices. Red is (unfortunately) a hold-over/myth from the old photographic darkroom days. Find a nice little LED light with a green shade you can hang in your tent or from a limb or whatever. Happy trails. Wes de kc9tnh . . __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Backlight color will remain amber
As a pilot, I use red lighting in the aircraft to view instruments, read charts, etc. Red is supposed to affect night vision the least, but maybe that's for reflected light? Incident light might be a different story. Traffic light green doesn't cause night blindness that I know of, and we all use it as incident light when driving at night. I don't know if amber has such qualities, but I do know I turn down the K3's backlight to its lowest setting when there is no other ambient light. The lowest setting seems to minimize "ghosting" or whatever the eyeball equivalent of video DC Restoration is. 73, matt W6NIA On Mon, 23 Sep 2013 16:40:00 -0700, you wrote: >On 9/23/2013 2:42 PM, KC9TNH wrote: >> FYI, if you're going to do as Wayne suggests and just turn the display off >> aiming a light at it (saving battery drain also) red is NOT the color that >> best enhances night vision if that matters to you. > >Cabin lights [and cockpit lights too] in C=130's were red to keep from >affecting our night vision capabilities on jump nights. I was under the >impression that red affected nightvision less than other colors. We >were all colorblind [still are :-)], maybe it didn't matter for us. > >I can discern the numeric keypad labels on my K3 only with strong light >from an angle. They seem to be just a tad shinier than the button body. > >73, > >Fred K6DGW >- Northern California Contest Club >- CU in the 2013 Cal QSO Party 5-6 Oct 2013 >- www.cqp.org > > >__ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html Matt Zilmer, W6NIA www.elecraft.com 831-763-4211 x129 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Backlight color will remain amber
On 9/23/2013 2:42 PM, KC9TNH wrote: FYI, if you're going to do as Wayne suggests and just turn the display off aiming a light at it (saving battery drain also) red is NOT the color that best enhances night vision if that matters to you. Cabin lights [and cockpit lights too] in C=130's were red to keep from affecting our night vision capabilities on jump nights. I was under the impression that red affected nightvision less than other colors. We were all colorblind [still are :-)], maybe it didn't matter for us. I can discern the numeric keypad labels on my K3 only with strong light from an angle. They seem to be just a tad shinier than the button body. 73, Fred K6DGW - Northern California Contest Club - CU in the 2013 Cal QSO Party 5-6 Oct 2013 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Backlight color will remain amber
FYI, if you're going to do as Wayne suggests and just turn the display off aiming a light at it (saving battery drain also) red is NOT the color that best enhances night vision if that matters to you. It's actually a shade of green often referred to as "traffic light green" or if you think of what's seen through night-vision devices. Red is (unfortunately) a hold-over/myth from the old photographic darkroom days. Find a nice little LED light with a green shade you can hang in your tent or from a limb or whatever. Happy trails. Wes de kc9tnh . . -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-Backlight-color-will-remain-amber-tp7573310p7579154.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Backlight color will remain amber
I removed the green backlight LED from the K1 backlight kit, and replaced it with a red one :). I like it! -kb7psg On Wed, 1 May 2013, Wayne Burdick wrote: I found that kind of change to the backlight color would be very time-consuming and expensive, requiring new tooling at the LCD manufacturer. This is not practical for the KX3. Sorry about that. Meanwhile, another approach would be to turn the backlight off and aim a colored lamp at the KX3. (I'm only half-joking. I've had to do just that on some Field Days, because we shared our favorite site with an astronomy group. They want things either totally dark or illuminated only with red lamps, which they happily supplied.) 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
