Spot the Resistors - UK Vintage Radio Repair and Restoration Discussion Forum

Valvepower · 21st Sep 2022, 12:35 pm

Hello,

Sorting through some resistors I’ve picked up at various swapmeets and jumbles over the years… I use these for 'period' looking repairs and builds

These and the Piher, Electrosil, Erie 100 series high stabs, Iskra and Welwyn Panclimatic Film types are the only resistors I usually bother picking up.

I’m curious about the manufacturer of the two types of film resistors in the pictures.

#1. Has light grey body and resembles the Iskra parts, however, I’m not sure they are Iskra, which normally have a light brown body. These were quite popular in the 1970’s – a distant memory makes me think they could have originated from India?

#2. They are of a moulded construction with an ‘Ohm’ with W in the middle. I did wonder if these were Ohmite meatal/oxide film parts.

Any clues as to the manufacturers?

Note to self… must get out more

Regards
Terry

GrimJosef · 21st Sep 2022, 1:21 pm

I recall seeing the 'Ohm' with W symbol on Welwyn resistors.

EDIT In fact, might they be Welwyn 'Metox' ones, as here https://www.keith-snook.info/quad-fm...0resistors.PDF ? Ha !, Terry, If you think you need to get out more ...

.

Cheers,

GJ

Valvepower · 21st Sep 2022, 1:59 pm

Thanks for the reply.

That makes sense. So, that's one accounted for. I suppose these would have been the precursor of the current Metal Oxide WM range.

GJ, hope the medical problems you speak of in the 6L6/Quad thread conclude ok with no further problems. You’ll be missed at the Jumble.

Regards
Terry.

21st Sep 2022, 1:59 pm	#3
Valvepower Octode Join Date: Aug 2008 Location: Rayleigh near Southend-On-Sea, Essex, UK. Posts: 1,883	Re: Spot the Resistors Thanks for the reply. That makes sense. So, that's one accounted for. I suppose these would have been the precursor of the current Metal Oxide WM range. GJ, hope the medical problems you speak of in the 6L6/Quad thread conclude ok with no further problems. You’ll be missed at the Jumble. Regards Terry. Last edited by Valvepower; 21st Sep 2022 at 2:26 pm.

21st Sep 2022, 12:35 pm	#1
Valvepower Octode Join Date: Aug 2008 Location: Rayleigh near Southend-On-Sea, Essex, UK. Posts: 1,883	Spot the Resistors Hello, Sorting through some resistors I’ve picked up at various swapmeets and jumbles over the years… I use these for 'period' looking repairs and builds These and the Piher, Electrosil, Erie 100 series high stabs, Iskra and Welwyn Panclimatic Film types are the only resistors I usually bother picking up. I’m curious about the manufacturer of the two types of film resistors in the pictures. #1. Has light grey body and resembles the Iskra parts, however, I’m not sure they are Iskra, which normally have a light brown body. These were quite popular in the 1970’s – a distant memory makes me think they could have originated from India? #2. They are of a moulded construction with an ‘Ohm’ with W in the middle. I did wonder if these were Ohmite meatal/oxide film parts. Any clues as to the manufacturers? Note to self… must get out more Regards Terry Attached Thumbnails

21st Sep 2022, 1:21 pm	#2
GrimJosef Dekatron Join Date: Sep 2007 Location: Oxfordshire, UK. Posts: 4,311	Re: Spot the Resistors I recall seeing the 'Ohm' with W symbol on Welwyn resistors. EDIT In fact, might they be Welwyn 'Metox' ones, as here https://www.keith-snook.info/quad-fm...0resistors.PDF ? Ha !, Terry, If you think you need to get out more ... . Cheers, GJ __________________ http://www.ampregen.com Last edited by GrimJosef; 21st Sep 2022 at 1:41 pm.