THE GREAT MULLARD MAGIC BLOG — tyzack turner

  The Welwyn wire wound precision resistors that I offer are in the category of "once they're gone, they're gone" as they started life as a finite supply at the GPO Dollis Hill laboratory before ending up with me. Anyone know anything about Welwyn? Well, for those that don't, here's a potted history. Welwyn Electrical Laboratories Ltd was established in 1937 in Welwyn Garden City, near London, UK. Many of the earliest products were vitreous enamelled wirewound resistors which developed over the years into the well-known green W20 series, together with cracked carbon film resistors. The company relocated to the...