Welwyn "Metox" resistors

[Dagwood]

Hi

Does anyone recognise these??? or better still have a datasheet???

So far I've got next to knowhere on the net

Metal oxide
Wattage??
Voltage rating??
Blah

Cheers

 

[Wino]

Pretty old stuff: METOX - Reviews & Brand Information - WELWYN ELECTRIC LIMITED BEDLINGTON ENGLAND , - Serial Number: 72079900

Tolerance: can maybe be worked out by the colorbanding?
Wattage: physical size??

Sorry for not being able to give more informatio.

//Wino

 

[Dagwood]

Yeah, they are pretty old

5 colour bands, first 3 are value and the last 2 are both violet on all of the values ive got. Onje must be tolerance but not sure about the other

Think they may be 2 watts??

Cheers

 

[colincci]

Did you ever find a datasheet on these. I have a large quantity of them. They are sized about right for a 2W resistor, but I believe they are actually only a 1/2 watt. An early metal oxide, supposedly a tight tolerance for the time (2%).

 

[Dagwood]

Hi Colincci

No I never did but I think you are right on the current ratings.

Cheers

 

[colincci]

Hi Dagwood

I just finished sorting through the ones I have. A number of the boxes were label RL20. Both the boxes and the resistors appear identical to the ones labeled F20. I believe the RL20 were a newer, or replacement version of the F20. I was able to find a data sheet on the RL20 series. Link is here: http://www.ttelectronicsresistors.com/datasheets/RL.pdf

I will attach the pdf just in case the link disappers in the future.

 

[Dagwood]

Thanks colincci

Great work They definitely look the same as mine. I've sorted mine as well and will certainly look the part in tube amps

Case closed