I just received the 5 band resistor (OEM) today and the red, forth band is the tolerance (2%), as usual. It's 680 Ohms, and who knows what the fifth band is all about.
Bil Green PC 1000 Mammoth Lakes, CA 93546 760-924-1000 Thursday, November 4, 2004, 8:58:50 AM, you wrote: ww> Yes, it is very confusing to me. ww> I was just looking at a chart, and resistors can be ww> marked with 3 to 6 bands. ww> If there are 4 bands, the first 3 determine the ww> resistance, and the4th band determines tolerence. ww> Now is where I get lost. ww> If there are 5 bands the first 4 determine ww> resistance, and the 5th determines tolerance. ww> 6 bands is just an extension of that with 5 being ww> tolerence, and 6 being temperature coefficient. ww> I'm just not sure what to do with 4 bands for ww> resistance. ww> I'm guessing that the 4th band(on a 5 or 6 banded ww> resister) is the multiplyer, so that it can be very ww> precision, and/or odd value. ww> Anyone wish to speak to this? ww> walter ww> --- Gary McCartney <[EMAIL PROTECTED]> wrote: >> One question. When we look at a resistor, how are >> we supposed to know if >> it is a 4 band resistor with the 5th band meaning >> nothing, or if it is a >> 5 band resistor with the 5th band being >> important? Doesn't seem to make >> too much sense. >> >> >> >> >> Gary McCartney >> >> McCartney Electronics >> Guelph Ontario Canada >> Est. 1984 >> email: gary (at) number63.ca >> >> >> >> >> >> >> >> Bil Green wrote: >> > Jay, >> > >> > Someone finally replied with the correct value, >> and sure enough >> > it is 680 Ohms. One more thing to remember when >> checking resistors. >> > Red forth band means 2% tolerance (and the >> fifth band doesn't >> > really matter in most cases, I guess). >> > >> > >> > Bil Green >> > PC 1000 >> > Mammoth Lakes, CA 93546 >> > 760-924-1000 >> > >> > Wednesday, November 3, 2004, 5:22:39 AM, you >> wrote: >> > >> > JC> Bill, >> > JC> Thank you for the heads up on the RCA 2% >> info. I've been in RF&Microwave >> > JC> Calibration and repair for over 20 years, >> and this is a new one on me. Of >> > JC> course, RCA doesn't do much test equipment. >> Hope the 2% does it for you. >> > >> > JC> Jay Cashman >> > JC> Jay Cashman Services >> > JC> 3824 Ance Creek Rd >> > JC> Reeds Spring MO. 65737 >> > JC> (417)272-9789 >> > JC> Satellite, Home Entertainment and Computer >> > JC> Installation, Service and Repair >> > JC> ----- Original Message ----- >> > JC> From: "Bil Green" >> <[EMAIL PROTECTED]> >> > JC> To: "ELECTRONICS PROFESSIONALS LIST" >> <[EMAIL PROTECTED]> >> > JC> Sent: Tuesday, 02 November, 2004 12:44 >> > JC> Subject: Re[2]: [Techs] Need Resistor Value >> (5 color bands - readable) >> > >> > >> > >> >>>Hi Jay, >> >>> >> >>>Thanks for your advice. Someone suggested that >> it may be 680 Ohm (with >> >>>the red indicating 2% - common with RCA >> flameproof) and I suppose you >> >>>would disregard the white band. >> >>> >> >>>Andrews Electronics has one in stock, so I >> ordered it and will check >> >>>the resistance tomorrow when I get it. I hope >> it's very rare that >> >>>those selected resistors are used. >> >>> >> >>> >> >>>Bil Green >> >>>PC 1000 >> >>>Mammoth Lakes, CA 93546 >> >>>760-924-1000 >> >>> >> >>>Tuesday, November 2, 2004, 9:50:51 AM, you >> wrote: >> >>> >> >>>JC> Bill, >> >>>JC> This seems to be a "selected value" >> resistor, and starting with the >> > >> > JC> band >> > >> >>>JC> closest to one end of the resistor, you >> read the exact value of the >> >>>JC> resistor, either 68129 ohms or 92186 ohms. >> It's a pain in the butt, >> > >> > JC> but >> > >> >>>JC> you're looking at measuring many of your >> stock resistors to find one >> > >> > JC> with >> > >> >>>JC> the exact value - and pray that your DMM >> is accurate to 1 ohm. This >> > >> > JC> is >> > >> >>>JC> probably a current setting resistor, so >> you could even put in a 10k >> > >> > JC> pot as a >> > >> >>>JC> rheostat and set the value that way, then >> "tweak" it untill the >> > >> > JC> circuit >> > >> >>>JC> works properly. >> >>>JC> Good luck! >> >>> >> >>>JC> Jay Cashman >> >>>JC> Jay Cashman Services >> >>>JC> 3824 Ance Creek Rd >> >>>JC> Reeds Spring MO. 65737 >> >>>JC> (417)272-9789 >> >>>JC> Satellite, Home Entertainment and Computer >> >>>JC> Installation, Service and Repair >> >>>JC> ----- Original Message ----- >> >>>JC> From: "Bil Green" >> <[EMAIL PROTECTED]> >> >>>JC> To: "[EMAIL PROTECTED]" >> <[EMAIL PROTECTED]> >> >>>JC> Sent: Tuesday, 02 November, 2004 01:50 >> >>>JC> Subject: [Techs] Need Resistor Value (5 >> color bands - readable) >> >>> >> >>> >> >>> >> >>>>>Panasonic PV-DM2799 >> >>>>>27" TV-DVD-VCR >> >>>>> >> >>>>>The SMPS is not running and I found an open >> resistor, and >> >>>>>a shorted STRG6651 power converter chip. >> D1508 was also >> >>>>>shorted. >> >>>>> >> >>>>>Scraping the coating off of one side of the >> 1/4W resistor, >> >>>>>I was able to measure as high as 100 Ohms >> from each end to >> >>>>>the break in the center. >> >>>>> >> >>>>>It's not at all burnt, but ~200 Ohms or so >> isn't even close >> >>>>>to the color code (any way I read it). My >> trick didn't work >> >>>>>this time! >> >>>>> >> >>>>>The colors on the resistor are as follows: >> >>>>>BLUE - GRAY - BROWN - RED - WHITE >> >>>>> >> >>>>>or it could be read: >> >>>>>WHITE - RED - BROWN - GRAY - BLUE >> >>>>> >> >>>>>The STRG6651 reads 5 Ohms from pin 3 to pin >> 4 so I figure >> >>>>>it's toast. >> >>>>> >> >>>>>Bil Green >> >>>>>PC 1000 >> >>>>>Mammoth Lakes, CA 93546 >> >>>>>760-924-1000 >> >>>>> >> >>>>> >> >>>>>>_______________________________________________ >> >>>>>Tech Repair CD...order your just $49.00 plus >> shipping...One year of >> >>> >> >>>JC> updates free. >> >>> >> >>>>>www.intrepid-video.com www.tech-repair.net >> >>>>>Techs mailing list >> >>>>>[EMAIL PROTECTED] >> >>>>>>http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> >>>>> >> >>> >> >>> >> >>>JC> >> _______________________________________________ >> >>>JC> Tech Repair CD...order your just $49.00 >> plus shipping...One year of >> > >> > JC> updates free. >> > >> >>>JC> www.intrepid-video.com www.tech-repair.net >> >>>JC> Techs mailing list >> >>>JC> [EMAIL PROTECTED] >> >>>JC> >> ww> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> >>> >> >>> >> >>>>_______________________________________________ >> >>>Tech Repair CD...order your just $49.00 plus >> shipping...One year of >> > >> > JC> updates free. >> > >> >>>www.intrepid-video.com www.tech-repair.net >> >>>Techs mailing list >> >>>[EMAIL PROTECTED] >> >>>>http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> >>> >> > >> > >> > >> > JC> >> _______________________________________________ >> > JC> Tech Repair CD...order your just $49.00 >> plus shipping...One year of updates free. >> > JC> www.intrepid-video.com www.tech-repair.net >> > JC> Techs mailing list >> > JC> [EMAIL PROTECTED] >> > JC> >> ww> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> > >> > >> > _______________________________________________ >> > Tech Repair CD...order your just $49.00 plus >> shipping...One year of updates free. >> > www.intrepid-video.com www.tech-repair.net >> > Techs mailing list >> > [EMAIL PROTECTED] >> > >> ww> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> > >> >> >> _______________________________________________ >> Tech Repair CD...order your just $49.00 plus >> shipping...One year of updates free. >> www.intrepid-video.com www.tech-repair.net >> Techs mailing list >> [EMAIL PROTECTED] >> ww> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com >> ww> ===== ww> Walter Wood ww> United TV Service ww> 501 Poplar St. ww> P.O. box 602 ww> Pulaski Tn. 38478 ww> mailto:[EMAIL PROTECTED] ww> _______________________________________________ ww> Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. ww> www.intrepid-video.com www.tech-repair.net ww> Techs mailing list ww> [EMAIL PROTECTED] ww> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
