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inductor identification..
need to id an inductor..its marked up 220..
i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. |
need to id an inductor..its marked up 220..
22 pico-henries? A 220 cap would be a 22 pico-farad. Sorry, my advise would be measure. And you are right, we both should know this. 73 Gary N4AST |
need to id an inductor..its marked up 220..
22 pico-henries? A 220 cap would be a 22 pico-farad. Sorry, my advise would be measure. And you are right, we both should know this. 73 Gary N4AST |
Try 220 Micro Henry's :-)
JGBOYLES wrote: need to id an inductor..its marked up 220.. 22 pico-henries? A 220 cap would be a 22 pico-farad. Sorry, my advise would be measure. And you are right, we both should know this. 73 Gary N4AST |
Try 220 Micro Henry's :-)
JGBOYLES wrote: need to id an inductor..its marked up 220.. 22 pico-henries? A 220 cap would be a 22 pico-farad. Sorry, my advise would be measure. And you are right, we both should know this. 73 Gary N4AST |
Try 220 Micro Henry's :-)
RED/RED/BLACK zindazenda wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. |
Try 220 Micro Henry's :-)
RED/RED/BLACK zindazenda wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. |
Hi all
But red/red/black should be 22 micro Henry's , shouldn't it ? 73 Dieter, OE2CDM "Melvyn T Phillips" schrieb im Newsbeitrag ... Try 220 Micro Henry's :-) RED/RED/BLACK zindazenda wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. |
Hi all
But red/red/black should be 22 micro Henry's , shouldn't it ? 73 Dieter, OE2CDM "Melvyn T Phillips" schrieb im Newsbeitrag ... Try 220 Micro Henry's :-) RED/RED/BLACK zindazenda wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. |
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On Fri, 14 Nov 2003 10:01:15 +0100, "Dieter Mayr"
wrote: Hi all But red/red/black should be 22 micro Henry's , shouldn't it ? 73 Dieter, OE2CDM 220 is red-red-brown, usually, but you never know which standard they follow, or perhaps they have their own standard, so even when they write figures 220 could mean 22 or 220 µH, and pF if it was a capacitor.... see the comments from W6WRT, too 73, LA8AK http://home.online.no/~la8ak/ -- remove ,xnd to reply (Spam precaution!) |
On Fri, 14 Nov 2003 10:01:15 +0100, "Dieter Mayr"
wrote: Hi all But red/red/black should be 22 micro Henry's , shouldn't it ? 73 Dieter, OE2CDM 220 is red-red-brown, usually, but you never know which standard they follow, or perhaps they have their own standard, so even when they write figures 220 could mean 22 or 220 µH, and pF if it was a capacitor.... see the comments from W6WRT, too 73, LA8AK http://home.online.no/~la8ak/ -- remove ,xnd to reply (Spam precaution!) |
i know there is a code (japanese) that most/all the manufactors use, but i
just dont remember it!!!its the multiplier i cant remember!! its not colour coded as i know that and thats always the same ie 22uh would be red red black..2.2uh red red gold. 220nh red red silver..... so i reccon its 22uh... taking the 0 as black. 220uh would be 221? 2.2mh 222 ???? g0zen "Bill Turner" wrote in message ... On Thu, 13 Nov 2003 23:34:50 -0000, "zindazenda" wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. __________________________________________________ _______ Unless you know the manufacturer and know their system, you must measure. There are too many differences between makers. "Standards" have long since gone by the wayside. Sorry. -- Bill, W6WRT |
i know there is a code (japanese) that most/all the manufactors use, but i
just dont remember it!!!its the multiplier i cant remember!! its not colour coded as i know that and thats always the same ie 22uh would be red red black..2.2uh red red gold. 220nh red red silver..... so i reccon its 22uh... taking the 0 as black. 220uh would be 221? 2.2mh 222 ???? g0zen "Bill Turner" wrote in message ... On Thu, 13 Nov 2003 23:34:50 -0000, "zindazenda" wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. __________________________________________________ _______ Unless you know the manufacturer and know their system, you must measure. There are too many differences between makers. "Standards" have long since gone by the wayside. Sorry. -- Bill, W6WRT |
On Thu, 13 Nov 2003 23:34:50 +0000, zindazenda wrote:
need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. Most likely 22 micro Henries or possibly 220 micro Henries. 73, Ed. EI9GQ. -- Remove 'X' to reply by e-mail http://homepage.eircom.net/~ei9gq Linux 2.4.22 |
On Thu, 13 Nov 2003 23:34:50 +0000, zindazenda wrote:
need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. Most likely 22 micro Henries or possibly 220 micro Henries. 73, Ed. EI9GQ. -- Remove 'X' to reply by e-mail http://homepage.eircom.net/~ei9gq Linux 2.4.22 |
"zindazenda" wrote in message ...
need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. It is 22uh Look it as if it was a resistor but instead of ohms you express it in microhenrys Red red black is 22ohms so your inductor is 22uh The multipliers are Brown 10 Black 1 Gold 0.1 Silver 0.01 So if the colors was red red gold then it would be 2.2uh and so on It took me weeks to realize that I was reading an 22uh inductor as 220uh Thanasis |
"zindazenda" wrote in message ...
need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc thanks.. It is 22uh Look it as if it was a resistor but instead of ohms you express it in microhenrys Red red black is 22ohms so your inductor is 22uh The multipliers are Brown 10 Black 1 Gold 0.1 Silver 0.01 So if the colors was red red gold then it would be 2.2uh and so on It took me weeks to realize that I was reading an 22uh inductor as 220uh Thanasis |
On Fri, 14 Nov 2003 12:33:36 -0800, Bill Turner
wrote: On Thu, 13 Nov 2003 23:34:50 -0000, "zindazenda" wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc ISTR a simple LC oscillator that, when coupled to a frequency counter, enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. |
On Fri, 14 Nov 2003 12:33:36 -0800, Bill Turner
wrote: On Thu, 13 Nov 2003 23:34:50 -0000, "zindazenda" wrote: need to id an inductor..its marked up 220.. i should know this but my minds gone blank...how does the coding go?? obviously first 2 digits are the value and last multiplyer so to speak..so 22 what..nh?uh? etc ISTR a simple LC oscillator that, when coupled to a frequency counter, enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. |
"Mike W" wrote in message
... ISTR a simple LC oscillator that, when coupled to a frequency counter, enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. One thing I've used ... if you simply put the inductor in series with a resistor, and then put RF across it, you can then measure the voltage drops across the resistor and the inductor with your RF probe and from there calculate the inductance ... or capacitance for that matter. The oscillator idea sounds a little more convenient, once you built up the oscillator, with a few capacitance choices to get the resonance on the right planet. ... ... |
"Mike W" wrote in message
... ISTR a simple LC oscillator that, when coupled to a frequency counter, enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. One thing I've used ... if you simply put the inductor in series with a resistor, and then put RF across it, you can then measure the voltage drops across the resistor and the inductor with your RF probe and from there calculate the inductance ... or capacitance for that matter. The oscillator idea sounds a little more convenient, once you built up the oscillator, with a few capacitance choices to get the resonance on the right planet. ... ... |
ISTR a simple LC oscillator that, when coupled to a frequency counter,
enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. ============== Realising that not every ham has a MFJ 259B or similar analyser , this is a really useful instrument and well worth considering ,not only for antenna matching. The 259B has among its facilities a capacitance and inductance measuring capability. When mesasuring inductances and capacitances it is very revealing that the measured values do change dramatically at higher frequencies ,especially useful to know when using components in HF and VHF circuits. BTW I also use an inductance & capacitance meter with LCD readout ,operating with an internal 1000 Hz oscillator , which measures the inductance / capacitance ,obviously at that frequency and is fine for up to the lower HF frequencies. Frank GM0CSZ / KN6WH |
ISTR a simple LC oscillator that, when coupled to a frequency counter,
enabled unknown/dubious inductors to be classified when oscillating with a known Capacitor. Where did I see it?. ============== Realising that not every ham has a MFJ 259B or similar analyser , this is a really useful instrument and well worth considering ,not only for antenna matching. The 259B has among its facilities a capacitance and inductance measuring capability. When mesasuring inductances and capacitances it is very revealing that the measured values do change dramatically at higher frequencies ,especially useful to know when using components in HF and VHF circuits. BTW I also use an inductance & capacitance meter with LCD readout ,operating with an internal 1000 Hz oscillator , which measures the inductance / capacitance ,obviously at that frequency and is fine for up to the lower HF frequencies. Frank GM0CSZ / KN6WH |
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