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Ten practical guides on reading type designations, choosing sockets, handling thyratrons and capacitors, and getting a usable quotation first time.
The type designation is the only thing a tube supplier can buy and sell against. This guide explains how the common Chinese Western and Russian numbering systems are structured and what to send with an enquiry.
Process GuideHow the cooling arrangement changes what you have to buy alongside the tube and what shortens tube life in industrial and broadcast service.
Product GuideWhy pin count is not enough, what the GZC and SK ranges cover, and what to check before ordering a socket for an audio or transmitting tube.
Troubleshooting GuideWhat a thyratron does in welding controls and modulators, how failures present themselves, and how to identify a replacement across three numbering systems.
Material GuideHow tank circuit capacitors are specified, why reactive power matters as much as capacitance and voltage, and what to send when you reorder.
Design GuideWhere fixed and variable vacuum capacitors are used, what limits them in service, and how to specify a replacement without changing the tuning.
Buying GuideHow the main audio output types differ, what matching means in practice, and how amplifier makers and repair shops should plan supply.
Buying GuideNew old stock is finite. What to ask about condition and markings, and when an original type is worth it against current production.
Maintenance GuidePractical storage and handling rules that keep spares serviceable, from shelf conditions to the checks worth making before a tube goes into equipment.
Buying GuideThe five pieces of information that turn an enquiry into a usable quotation, and what to expect back.
They are written from what we see in customer enquiries: the questions that come up before an order and the mistakes that cause a wrong shipment.
We can tell you what we hold for a type and what we can supply. Circuit design decisions stay with your engineer, and we will say so rather than guess.
Link to it freely. For any other use, email us first.
Send a photograph of the tube or the nameplate. Identifying a designation from a picture is routine work here.