Ca Siemens & Halske – Tekade 4K60 RE604 – REN2204 Telefunken – EVE173 Telefunken

Description

This section comprises all German made valves spanning from 1920’s onward.

From left:

Tekade (branded Symphony) type 4K60 is an audio triode alsoused in DIY sets and direct equivalent of  Telefunken RE604.

Siemens & Halske type Ca of 1928. This is a triode widely used in DIY amplifier to boost input signal for large power audio valves

Telefunken REN2204 is a double triode early type with top pip.

Pair Telefunken EVE173 . The special four pin base has a shorter pin for the anode The general arrangement of connections is the same as the B4 base.