E80F / 6084 / CV2729 ✚ E180F / 6688
The E80F is by nature a PROFESSIONAL valve designed for special purposes such as measuring, military and medical instruments. Due to its characteristics it is very suitable for high performance AUDIO applications. It replaces the much more famous EF86. Another interesting tube is the E180F = 6688 , a small pentode for small spaces, with very common application data and a very high Gm! ... Valve for Radio, military and instrumental applications; today rediscovered and used by AUDIO enthusiasts, especially in DIY projects, with very enthusiastic opinions.
E80F EQUIVALENT: 6084 = CV2729
E180F EQUIVALENT: 6Ж9П = 6688 = CV3998 = 5A / 170K = CV6189