diyAudio (
-   Parts (
-   -   Welwyn "Metox" resistors (

Dagwood 25th April 2013 06:10 AM

Welwyn "Metox" resistors
1 Attachment(s)

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

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

Metal oxide
Voltage rating??


Wino 25th April 2013 11:34 AM

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.


Dagwood 26th April 2013 12:47 AM

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??


colincci 10th December 2014 08:17 PM

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 12th December 2014 09:46 AM

Hi Colincci

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


colincci 14th December 2014 07:55 PM

1 Attachment(s)
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:

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

Dagwood 15th December 2014 06:04 PM

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:)

All times are GMT. The time now is 04:08 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 18.75%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio