Guys can you help me indentify theese resistors?

elviukai · 16th October 2010, 10:06 PM

I need to source them but didnt know what brand, otherwise I need to change all (nearly 200psc) instead 4 burned

It have logo they remind me bennic logo or vishay, but i was not able to find them, but maybe somebody know it will help me a lot.

thanks in advance

wrenchone · 16th October 2010, 10:38 PM

Looks like Roederstein/Resista to me. Good hunting.

elviukai · 17th October 2010, 04:26 PM

Thanks wrenchone, unfortunatley i wasnt able to find them on Roe. they have similar look to Vishay PAC ressitors at best. but they are not the same. Can anoyne tall which company logo is printed on theese resitors?
thanks in advance..

sakellogg · 17th October 2010, 05:17 PM

on our railroad we use 40-80 watt resistors for heat sources in gate motors ect to fight frost.
most have that stamp(triangle ohm sym)and name ohmite. might not be the right spelling. however might be sub contracted to a subcontractor ect..... so not sure if its helps.

elviukai · 17th October 2010, 08:18 PM

Thanks I surfed throught ohmite website also its production on farnell with photos but no resitor have theese stamps neither look similar

wrenchone · 17th October 2010, 08:25 PM

I checked around, and those are "Resista" resistors, at least the one with the Omega symbol in the triangle for a logo. Roederstein was bought out by Vishay a while back, so those resistors aren't made any more, or maybe in a different form by Roederstein/Vishay subsidiary Draloric.

elviukai · 09:03 PM

wrenchone, thanks again , I already searched yesterday for roedernstein resista, no results not even datasheet or pic..

seems i will need desolder nearly 200 resitors

and solder in all news ones , unless i find similar resistor with same thermo behaviuor which I believe is nearly mission imposible

anyways thanks for help

hm... enetred draliric and i see something very similar from apearance

VISHAY DRALORIC|AC05000002208JAC00|RESISTOR, 5W, 5%, 2R2 | Farnell Ireland

will check theese out

wrenchone · 17th October 2010, 09:20 PM

That's probably as close as you're going to get these days.

elviukai · 17th October 2010, 09:34 PM

I will buy few and desolder few working genue and will measure in same paraleled chain to see if they behave similar under temperature changes. what is surprise that resitors i need is mountened in 2008 years manufactured product and I opened few others -they use the same resitors. either manufacturer like so much NOS resitors or they still are available. all other parts seems new and fresh brands..

cocolino · 17th October 2010, 10:29 PM

I think Ohmite is correct.
Anyway those are very probably MOX (metal oxide film) resistors!
From the size I`d guess they are about 4W.
If so, VITROHM PO591-0 could be a replacement.

17th October 2010, 04:26 PM	#3
elviukai diyAudio Member Join Date: Apr 2003 Location: EU- Electronic Union country	Thanks wrenchone, unfortunatley i wasnt able to find them on Roe. they have similar look to Vishay PAC ressitors at best. but they are not the same. Can anoyne tall which company logo is printed on theese resitors? thanks in advance.. __________________ natural sound reproduction from traditional dynamic drivers?!! come on.. no no, it can be.. it must be!..

17th October 2010, 08:18 PM	#5
elviukai diyAudio Member Join Date: Apr 2003 Location: EU- Electronic Union country	Thanks I surfed throught ohmite website also its production on farnell with photos but no resitor have theese stamps neither look similar __________________ natural sound reproduction from traditional dynamic drivers?!! come on.. no no, it can be.. it must be!..

17th October 2010, 08:50 PM	#7
elviukai diyAudio Member Join Date: Apr 2003 Location: EU- Electronic Union country	wrenchone, thanks again , I already searched yesterday for roedernstein resista, no results not even datasheet or pic.. seems i will need desolder nearly 200 resitors and solder in all news ones , unless i find similar resistor with same thermo behaviuor which I believe is nearly mission imposible anyways thanks for help hm... enetred draliric and i see something very similar from apearance VISHAY DRALORIC\|AC05000002208JAC00\|RESISTOR, 5W, 5%, 2R2 \| Farnell Ireland will check theese out __________________ natural sound reproduction from traditional dynamic drivers?!! come on.. no no, it can be.. it must be!.. Last edited by elviukai; 17th October 2010 at 09:03 PM.

17th October 2010, 09:34 PM	#9
elviukai diyAudio Member Join Date: Apr 2003 Location: EU- Electronic Union country	I will buy few and desolder few working genue and will measure in same paraleled chain to see if they behave similar under temperature changes. what is surprise that resitors i need is mountened in 2008 years manufactured product and I opened few others -they use the same resitors. either manufacturer like so much NOS resitors or they still are available. all other parts seems new and fresh brands.. __________________ natural sound reproduction from traditional dynamic drivers?!! come on.. no no, it can be.. it must be!..

17th October 2010, 10:29 PM	#10
cocolino diyAudio Member Join Date: May 2002 Location: Bavaria (south of veal sausage equator)	I think Ohmite is correct. Anyway those are very probably MOX (metal oxide film) resistors! From the size I`d guess they are about 4W. If so, VITROHM PO591-0 could be a replacement. __________________ Christoph *STEAL the BEST - INVENT the REST*


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16th October 2010, 10:38 PM	#2
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Looks like Roederstein/Resista to me. Good hunting.

17th October 2010, 05:17 PM	#4
sakellogg diyAudio Member Join Date: Nov 2008 Location: dixon ill	on our railroad we use 40-80 watt resistors for heat sources in gate motors ect to fight frost. most have that stamp(triangle ohm sym)and name ohmite. might not be the right spelling. however might be sub contracted to a subcontractor ect..... so not sure if its helps.

17th October 2010, 08:25 PM	#6
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	I checked around, and those are "Resista" resistors, at least the one with the Omega symbol in the triangle for a logo. Roederstein was bought out by Vishay a while back, so those resistors aren't made any more, or maybe in a different form by Roederstein/Vishay subsidiary Draloric.

17th October 2010, 09:20 PM	#8
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	That's probably as close as you're going to get these days.

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