Hello Coilers, I've a tube that I'd like identified. The only markings on it are the numbers 5932....no manufacturer, etc. It resembles a 6L6 in size and internal appearance. 73, Weazle, VE3EAR/VE3WZL Listening: 147.030+ and 442.075+ E-mail: weazle-at-hurontel.on.ca or ve3ear-at-rac.ca Web site: www.hurontel.on.ca/~weazle