Radio Valves

Six-Sixty S.S.2a L.F.

2-volt triode

Six-Sixty S.S.2a L.F.Six-Sixty S.S.2a L.F.
Six-Sixty S.S.2a L.F.

This triode has an unusual mottled green bakelite base. Made on 23rd. August, 1927*. Possibly a below specification Mullard PM2A, but it does not appear in any of the 1930s equivalent lists I have. It is certainly an azide process valve. It is rated for a maximum anode voltage of 100V versus the 150V rating of the Mullard valve.

*The date is engraved on the envelope.

© Andy Cowley, 2005-2012     Home

This page last modified by AJC on Friday, 26-Mar-2010