<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1483450845605_189830">I used a couple of these in an SB-220 (green ones). Looked great. I haven't tried them in my 301/401 yet.</div><div id="yui_3_16_0_ym19_1_1483450845605_189827"><br></div><div id="yui_3_16_0_ym19_1_1483450845605_189828" dir="ltr"><a href="http://cointaker.com/products/44-47-frosted">http://cointaker.com/products/44-47-frosted</a></div><div dir="ltr" id="yui_3_16_0_ym19_1_1483450845605_189885"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1483450845605_189862"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1483450845605_189866">73, Stew K3ND<br></div><div id="yui_3_16_0_ym19_1_1483450845605_189792"><span></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1483450845605_189796"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1483450845605_189988" style="display: block;"> <div style="font-family: times new roman, new york, times, serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1483450845605_189987"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1483450845605_189986"> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "rgroh@swbell.net" <rgroh@swbell.net><br> <b><span style="font-weight: bold;">To:</span></b> Joseph Smalley <mymodecw-hamitup@yahoo.com>; "heath@puck.nether.net" <heath@puck.nether.net> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, January 3, 2017 11:54 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Heath] Replacing dial lights with LEDS in SB-102<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1483450845605_189985"><br><div id="yiv8594895122"><div id="yui_3_16_0_ym19_1_1483450845605_189991"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_ym19_1_1483450845605_189990"><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084"><span id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15145">I don't have an exact answer to your question but I don't think there is anything out there that gives you exactly what you want. You are entirely correct that most LED's are pretty much unidirectional - i.e. they radiate in a front facing cone of light. As an electronics engineer (now retired) I rather rapidly slip into the design mode and think about how I would make a solution. We need a structure to hold an LED (or maybe 2 or three **) so they shine down into the dial area. Then we need a small number of extra parts to drive the LED's (which need DC) from the existing bulb source (essentially 12 VAC). Then we need a way to connect our new little LED assembly electrically to the old bulb. All very doable but they will require a bit of thought to pull it off. I don't own any Heathkit gear at the moment although I certainly have some other older radios that could benefit from an LED approach. </span></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084"><span><br clear="none"></span></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084"><span>Good luck - let us know what you find out.</span></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084"><span><br clear="none"></span></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084">** Two LED's might be a nice choice as you could put one across the other in reverse polarity arrangement. Then one acts as a reverse protection diode for the other. Also means a single dropping resistor. So 2 LED's and one resistor.</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084">73</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483461543122_15084">Bob Groh, WA2CKY</div> <div class="yiv8594895122qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv8594895122yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv8594895122yqt5904440436" id="yiv8594895122yqt11341"><div dir="ltr"><font size="2" face="Arial"> On Tuesday, January 3, 2017 8:40 AM, Joseph Smalley via Heath <heath@puck.nether.net> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv8594895122y_msg_container"><div id="yiv8594895122"><div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3263">I have posted this question once before about replacing the dial lights with LEDS got a few suggestions.</div><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3352"><br clear="none"></div><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3449">One was using LEDS from the Superbrightleds company. They make a great product.</div><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3450"><br clear="none"></div><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3451">Unfortunately for me the LEDS I purchased do not project the light in the right direction towards the plastic</div><div id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3452"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3453">circular dial. These LEDS shine the light straight out and in the SB-102 that is down not at the circular dial.</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3454"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3455">Has anyone used a different LED from this company that projects the light at a 90 degree angle which would be<br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3456"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3464">pointing at the edge of the circular dial. If so what color did you use? Was it Cool or Warm?</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3545"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3526">I see a few on there website that may be what I need but I want to make sure it could be used successfully</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3554"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3555">because those I purchased are not what I needed.</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3590"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3591">I did interact with there technical people but not sure if they understood what I wanted to do.</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3603"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3625">Any suggestions as I dont want to modify the SB-102 as I built it in 1972 and want to keep it stock.</div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3626"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3665">73 Joe WA3CKA<br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3592"><br clear="none"></div><div dir="ltr" id="yiv8594895122yui_3_16_0_ym19_1_1483411248338_3593"><br clear="none"> </div></div></div></div><br clear="none">_______________________________________________<br clear="none">Heath mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Heath@puck.nether.net" target="_blank" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="https://puck.nether.net/mailman/listinfo/heath">https://puck.nether.net/mailman/listinfo/heath</a><br clear="none"><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><div class="yqt5904440436" id="yqt09488">_______________________________________________<br clear="none">Heath mailing list<br clear="none"><a shape="rect" ymailto="mailto:Heath@puck.nether.net" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a><br clear="none"><a shape="rect" href="https://puck.nether.net/mailman/listinfo/heath" target="_blank">https://puck.nether.net/mailman/listinfo/heath</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>