About: http://webisa.webdatacommons.org/218695303

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The Rogers are a Canadian company and from what I can gather their tubes are generally re-brands of other makes, especially Dutch made philips (the same company that make the famous Amperex bugle boys's)
http://www.w3.org/ns/prov#wasQuotedFrom	head-fi.org