Nice 70's vintage genuine British made Brimar CV4055 ( 6CH6 EL821) pentode amplifier tubes.
All of the tubes are in the original British military boxes and are guaranteed. 6CH6 is a output power pentode with ratings and characteristics very similar to EL84, but with a different pinout.
This item will NOT work directly in place of EL84, use of an adapter or changing socket connections is required. (the screen on EL822 is connected to pin 8 instead of pin 9, and pin 9 is the suppressor, which must be grounded or connected to pin 3) See other listing for 6CH6 + adapter if you need the adapter. The price is PER TUBE Matched pairs are available if you order in multiples of 2. This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
For more information on this tube type, please see data sheet : http://tubezone.co.uk/pdf/el821.pdf and a sample amplifier diagram for this tube type:http://tubezone.co.uk/pdf/diagrams/6ch6amp.pdf