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FERNSEH · 23rd Apr 2017, 6:14 pm

In fact it would appear the RF amplifier is an EF54 so the valveholder is correctly wired. In this valve the anode is connected to pin 2 and the screen grid to pin 3. The cathode is connected to no less than four pins, the designer of this valve made sure that the cathode inductances were reduced to the minimum. Seems the guy who did the modifications knew what he was doing after all.
Info about the EF54: http://www.r-type.org/exhib/aaa1093.htm

DFWB.

23rd Apr 2017, 6:14 pm	#22
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: HMV 1804 Television. In fact it would appear the RF amplifier is an EF54 so the valveholder is correctly wired. In this valve the anode is connected to pin 2 and the screen grid to pin 3. The cathode is connected to no less than four pins, the designer of this valve made sure that the cathode inductances were reduced to the minimum. Seems the guy who did the modifications knew what he was doing after all. Info about the EF54: http://www.r-type.org/exhib/aaa1093.htm DFWB.