yellow 5th band R

[frank]

Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

 

[Tom Biasi]

On 12/23/2017 5:16 PM, frank wrote:

Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

I don't think yellow was an option on 5 band resistors, it was on 6 band
where it was the temperature coefficient.

 

On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:

Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

yellow is used in lieu of gold for tolerance - it's non-metallic.


NT

 

[Mike Coon]

In article <23fcae71-981d-4ea0-8921-7c490c85c999@googlegroups.com>,
tabbypurr@gmail.com says...

On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:
Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

yellow is used in lieu of gold for tolerance - it's non-metallic.


NT

In which case why on earth would you have both? ("Lieu" implies
substitution!)

Mike.

 

[Phil Allison]

Mike Coon wrote:

-----------------

On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:
Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

yellow is used in lieu of gold for tolerance - it's non-metallic.




In which case why on earth would you have both? ("Lieu" implies
substitution!)

** I have two 1W, MF resistors here,


R1 = brown, black, gold, gold.

R2 = brown, black, back, silver, brown.

Can you say what their values and tolerances are ?


..... Phil

 

[frank]

tabbypurr@gmail.com wrote:

On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:

yellow is used in lieu of gold for tolerance - it's non-metallic.

the resistors I'm talking about have both gold (as 4th band) and yellow
as 5th band.

F

 

[frank]

Phil Allison <pallison49@gmail.com> wrote:

Mike Coon wrote:

** I have two 1W, MF resistors here,


R1 = brown, black, gold, gold.

1 ohm, 5%

R2 = brown, black, back, silver, brown.

1 ohm, 1%

Well, I guess the answer to my original question was probably a
temperature tolerance band or something similar.
Seems I am not alone.

Frank

 

On Sunday, 24 December 2017 09:19:48 UTC, Mike Coon wrote:

In article <23fcae71-981d-4ea0-8921-7c490c85c999@googlegroups.com>,
tabbypurr says...
On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:

Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

yellow is used in lieu of gold for tolerance - it's non-metallic.


NT

In which case why on earth would you have both? ("Lieu" implies
substitution!)

Mike.

Yes, obviously the presence of gold means it's not substituting for gold. This explains:
http://www.resistorguide.com/pictures/resistor_color_codes_chart.png


NT

 

[Look165]

The 3 first are the value (the last one is the multiplier).

Then, there is the tolerance.

And finally it can exist a 5th one, the thermal drift.


frank a écrit :

Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank

 

On Sunday, December 24, 2017 at 5:56:45 AM UTC-5, frank wrote:

tabbypurr@gmail.com wrote:
On Saturday, 23 December 2017 22:16:37 UTC, frank wrote:

yellow is used in lieu of gold for tolerance - it's non-metallic.

the resistors I'm talking about have both gold (as 4th band) and yellow
as 5th band.

Too bad there is usually so little difference between yellow and gold as opposed to blue and gold or silver and gold.