Vintage genuine British made STC and ITT CV1664 3A/110A triode amplifier tubes. These are all made in the same factory (ITT took over from STC in the late 70's). Also equivalent to type 4022A.
Please contact us for availability on this item. Occasionally cosmetically challenged or good used tubes are available at a slightly lower price.
This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
3A/110A is a low gain (mu = 12), triode signal tube similar to US type 27 or 56 but with a different base and filament voltage. For more information, see data sheet : http://www.tubezone.co.uk/pdf/3A-110A.pdf
Tubes are tested with an AVO tester and test within normal factory tolerance for plate current and transconductance, and are tested for leakage and shorts.