Unusual new old stock vintage Mullard brand Holland made ECC2000 tubes. The tubes are new old stock and mostly in commercial boxes. ECC2000 is a special shock and vibration resistant gold pin RF dual triode tube that uses an odd 10 pin socket.
Limited quantities available.
This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
For data please see: http://www.tubezone.co.uk/pdf/ecc2000.pdf