Philips EL360 Output pentode
The EL360 is an output pentode introduced by Philips / Mullard in October 1958. The applications are radar scanning, series regulator, and pulse modulator. The ratings given are for pentode use. The datasheet shows that for the high voltage regulator and pulse modulator use the peak voltage can reach several kV. The wide glass tube envelope is 32 mm in diameter, and excluding the base pins is 95 mm tall.
The EL360 was first introduced in 1958.