Looks like the "Loewe Multi-valves' were forerunners to the GE 'Compactron' tube series: From: http://www.geocities.com/portable_tubes/newtubes.html In the late 1950's, tube designers still had a few tricks up their sleeves. General Electric's engineers at Owensboro, Kentucky introduced the "Compactron." Compactrons are multi-function tubes, combining diodes, triodes, and pentodes in various combinations, designed to reduce size and component counts in entertainment and industrial devices. -snip- GE engineers claimed a two-Compactron radio design could replace a standard five-tube radio complement (seven transistors were needed for the same performance), or a 10-Compactron TV-set could replace 15 tubes and three diodes or 24 transistors and 11 diodes. Jim ----- Original Message ----- From: "Attila Muhi" To: Sent: Thursday, February 28, 2002 2:53 PM Subject: SV: Re: [OT]: Old Chips was [PIC]: Potato Powered PIC? > >If you want to see a REAL 'hollow state' IC, check this one out, a > >complete radio in a bottle, from 1926..... > >http://www.netcomuk.co.uk/~wwl/loewe.html > > > That one was nice ! I love it ! > > Attila Muhi - SM4RAN > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.