Welwyn "Metox" resistors - diyAudio
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Old 25th April 2013, 07:10 AM   #1
Dagwood is offline Dagwood  New Zealand
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Default Welwyn "Metox" resistors

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
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File Type: jpg Metox.jpg (306.5 KB, 159 views)
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Old 25th April 2013, 12:34 PM   #2
Wino is offline Wino  Sweden
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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
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Old 26th April 2013, 01:47 AM   #3
Dagwood is offline Dagwood  New Zealand
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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
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Old 10th December 2014, 09:17 PM   #4
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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%).
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Old 12th December 2014, 10:46 AM   #5
Dagwood is offline Dagwood  New Zealand
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Hi Colincci

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

Cheers
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Old 14th December 2014, 08:55 PM   #6
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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.
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File Type: pdf RL.pdf (262.6 KB, 7 views)
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Old 15th December 2014, 07:04 PM   #7
Dagwood is offline Dagwood  New Zealand
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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
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