Premium Vacuum Tubes

At this time, we do not sell to online tube vendors.

If you are a tube amp manufacturer, we can provide OEM price for factory matched pairs only. Please provide your business license information and use the contact form to contact us directly for a quotation. Minimum quantity applies to commercial orders.

All sample orders are at regular retail price – once you are satisfied with the quality, you can proceed with a commercial order then we will retro-apply the discount to your sample order in your new invoice.

Thank you for your understanding.

Some tubes have a numbered metal foil or paper sticker on them. These numbers are not the testing results – they are numbers used to identify each tube during the matching process. It has no meaning to tube users and we usually remove them when we ship the orders. Sometimes warehouse may omit this step during order processing.

If you find your newly purchased Psvane (Pavane) tubes have this numbered sticker on them, please remove it before installing the tube into your amplifier. If there is residual glue on the tube glass, you can use damp cloth to wipe the glue off. Do not wet the tube itself in any liquid.

The single biggest factor is the voltage added to the tube plate (anode). You cannot control the electron emission from the cathode (this is determined by the tube cathode material and tube age), so if the plate voltage is too high, the heat generated by electrons hitting the plate cannot be dissipated fast enough, which will cause a ‘red plate’. This usually happens on power tubes, not on preamp tubes.

To observe if a tube has ‘red plate’, turn off the room light at night and compare the color of the plates to other same kind of tubes. If one is obviously brighter than others, you should check the bias voltage (plate voltage). Adjust it until the tube is not showing red plate and within the amp manufacturer’s suggested bias range.

Do not bias more than 15% below the suggested bias voltage provided by the amp manufacturer – this will cause the tube not operating at optimal condition and will in fact shorten tube life.

Some amplifiers are designed with the tubes running with plate voltage higher than others – we suggest you follow the amp manufacturer’s recommendation.

This usually happens on smaller preamp tubes – the flash is from the heater when power on, and it only last a split of second then disappear. This is normal on tubes and happen randomly. It doesn’t short the tube life and will not affect the sound.

Some great vintage tubes made in 1950’s have the same flash and they lasted for over 40 years!

Well, it’s kind of highly technical… if you like reading the full blown story and have yourself familiarized with the tube terms, here is a good article:

http://www.vacuumtubes.net/How_Vacuum_Tubes_Work.htm

Read what the manufacturer has to say: