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barretter · 29th Jan 2010, 1:00 pm

Tim de Paravicini's EAR company has been using PL/EL509s in its (surprise, surprise) EAR509 amplifiers for 25 years now ; and several German integrated valve amplifiers from the 60s used push-pull pairs of EL500s in their output stages.

29th Jan 2010, 1:00 pm	#7
barretter Heptode Join Date: Jan 2006 Location: Todmorden, West Yorkshire, UK. Posts: 870	Re: EL or PL509 as an audio output valve. Tim de Paravicini's EAR company has been using PL/EL509s in its (surprise, surprise) EAR509 amplifiers for 25 years now ; and several German integrated valve amplifiers from the 60s used push-pull pairs of EL500s in their output stages.