26-01-2018, 02:45 PM
I'm sure there's a moral to this story.
Note the very low cutoff voltage of the EMI hexode CRTs. Would have been ideal for early solid state TVs where the video output stage was a big problem. The combination of high voltage and high speed was a hard nut to crack until theu invented the AF118. These EMI sets used what was high-ish power RF stage to drive the detector which drove the CRT directly. Back then getting the gain/bandwidth product was tough with valves.
Note the very low cutoff voltage of the EMI hexode CRTs. Would have been ideal for early solid state TVs where the video output stage was a big problem. The combination of high voltage and high speed was a hard nut to crack until theu invented the AF118. These EMI sets used what was high-ish power RF stage to drive the detector which drove the CRT directly. Back then getting the gain/bandwidth product was tough with valves.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
