Author Topic: Can someone ID this resistor for me  (Read 364 times)

Governor

Can someone ID this resistor for me
« on: October 07, 2019, 11:13:02 PM »
Hi, I have some resistors that I thought were carbon comp but not really sure ( they look like carbon comp 1/2w).  So Iíve done a destructive test on one and it looks to have a spinal filament inside, so now I donít know!  Thanks for your help, here is a pic:

https://www.dropbox.com/s/8dswk7xrpcqemi3/Photo%208-10-19%2C%2012%2033%2004%20pm.png?dl=0


willienillie

Re: Can someone ID this resistor for me
« Reply #1 on: October 07, 2019, 11:26:12 PM »
I cracked one carbon comp open and it didn't have those spirals, but maybe some do, I don't know.  I've definitely seen carbon films with the spiral structure, but maybe not black.

Not much help, sorry.
Fm,  Bdim7,  Cm7,  C#dim7

Kevin Mitchell

Re: Can someone ID this resistor for me
« Reply #2 on: October 08, 2019, 02:45:54 PM »
I've only seen the inside of a few resistors - but each carbon comp, film and metal film.
That sure does resemble like that of a film type. But I wouldn't know for sure.

-KM

vigilante397

Re: Can someone ID this resistor for me
« Reply #3 on: October 08, 2019, 04:30:25 PM »
They definitely look like carbon comp on the outside, but I just cracked one open to be sure and it definitely doesn't have the wire. I would suggest a wire-wound resistor, but those don't generally look like carbon comp and are usually higher power.

Short answer: No idea :P
"I'm not sure what "serious design flaws" you see. Does it explode or poison your dog?" - PRR

http://facebook.com/sushiboxpedals

Rob Strand

Re: Can someone ID this resistor for me
« Reply #4 on: October 08, 2019, 05:11:49 PM »
Quote
They definitely look like carbon comp on the outside, but I just cracked one open to be sure and it definitely doesn't have the wire. I would suggest a wire-wound resistor, but those don't generally look like carbon comp and are usually higher power.
You wouldn't expect wire for a 2k2 or 33k.   The spiral is the hint, white part isn't wire it's a cut.  Maybe Governor can confirm?

The structure looks like carbon film,


So perhaps this is an old carbon film resistor, back when they started to change.  If you look at the brown part of the resistor the color isn't as dense as the carbon comps, also it's more of a plastic type material.  I remember seeing that type of resistor in stuff when I was a kid.
« Last Edit: October 08, 2019, 05:13:29 PM by Rob Strand »
The mind often distorts without gain.

PRR

Re: Can someone ID this resistor for me
« Reply #5 on: October 09, 2019, 04:58:08 PM »
Antique carbon-film, made in a carbon-comp factory. Similar outside molding, different guts.

Governor

Re: Can someone ID this resistor for me
« Reply #6 on: October 11, 2019, 10:20:55 PM »
Ok, so I'm gathering NOS parts to build a Clark Gainster as close as I can to the original, I've pretty much sourced everything (Russian PIO caps, mallory 150's, Silver mica and Sprague Atom caps, NOS allen Bradley resistors, etc) except I'm struggling to find 1M NOS Allen Bradley 1/2w resistors! 

If I use these one that I have (assuming they are old carbon film) will there be any difference in tone?

stallik

Re: Can someone ID this resistor for me
« Reply #7 on: October 11, 2019, 10:27:53 PM »
No
Insanity: doing the same thing over and over again and expecting different results. Albert Einstein

duck_arse

Re: Can someone ID this resistor for me
« Reply #8 on: October 12, 2019, 09:48:26 AM »
duck a-duckka not fade away .....

Kipper who?

Rob Strand

Re: Can someone ID this resistor for me
« Reply #9 on: October 12, 2019, 06:19:00 PM »
Quote
but we will know .....
Those carbon comp resistors sound grainy to me anyway.  :icon_mrgreen:
The mind often distorts without gain.