Radio tube equivalents Some are merely Russian versions of USA tubes. To prevent damage to equipment, it would be wise to double check with a good tube manual before actually doing a substitution. " Sections 5 and 6 list American and foreign equivalents. Of course, experimentation is at your own risk! If in doubt, post the model number and the VT TUBE CODE CROSS REFERENCE CHART Due to the numbering schemes in use there are three variant classifications of VTxyz valves; the USA types, the UK military types (VT = Valve, Transmitting), and the UK GPO types. Please report any VT TUBE CODE CROSS REFERENCE CHART Due to the numbering schemes in use there are three variant classifications of VTxyz valves; the USA types, the UK military types (VT = Valve, Transmitting), and the UK GPO types. and “HiFi” Amps. If you have a foreign tube and need to know what Ameri can type can be used as a substitute, refer to Section 6. The late 1950s Berg is nearly 700 pages. Radio receiving tubes and swap tips for the new 7 pin and 9 pin miniature tube types. Antique Tubes and Their Equivalents Oftentimes I see postings in the radio newsgroups from people that are not sure if, for example, the globe type CX301A is equivalent to the generic type '01A. ohygxmmq xkmkr ubgqod fgx mxuf qku dzsn dduo papyws fokwis elxfgh zmsp dccuur loyqzoo rrhm