The picture tube looks like a prewar bulb-shaped one, since it really is a reworked prewar-type CRT:
In the late 30s-early 40s, the line of 7", 9", and 12" television CRTs with magnetic deflection and focusing was developed and ready for mass production. A few televisions were introduced before the war as well, ending up in 1941 with the 7" 17TN-3 set, which was advanced enough for a prewar TV but still inexpensive:
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and the bigger 23TN-4 tabletop with a 9" picture tube. And, then came the war…
[AP photo]
As you can guess, a significant part of the industry was ruined by the war so production chains and co-operations were broken. That's why the Moskvich-T1 known as the first postwar work in television, seems to trail behind even some prewar sets - it was just composed from some available components on some undamaged equipment by some surviving designers:
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However, by 1946 the industry was recovering pretty quickly, thus the need for CRTs was increasing. Since the prewar picture tubes were considered good enough, the CRT manufacturers reasonably decided not to 'reinvent the wheel' and just re-engaged their production, along with some improvements.
So, let's end that little historical excursus and get back to the TV. The main chassis features the way the picture tube is secured. The bell of the CRT is pulled up by a spring-loaded rim to the back side of the strong plastic frame, while the neck is held by the deflection yoke mounted on the chassis:
The frame itself, covered by the safety glass from the front,
is bolted to the front of the chassis, thus forming a solid and integral ‘main chassis unit’ that can be pulled out of the cabinet and securely played/serviced/repaired. Also the picture tube attached to the frame can be easily removed from the front of the cabinet by sliding the decorative screen bezel aside and unscrewing the plastic frame from the chassis.
The assembling is obviously neat and most of the wires and cables are gathered in bundles:
Some components are wired to the distribution rails which are made of thick tinned copper wire threaded through the isolating phenolic stands.
The porcelain socket of the local oscillator tube is mounted on the antivibration suspension:
The power supply chassis sits on the floor of the cabinet next to the main chassis; a thick harness with a tough 22-pin connector is used for their interconnection. In fact, the power chassis gathers two independent power supplies, for the audio and video sections, accordingly:
The bigger transformer powers up the video section, along with the rectifier that uses two 5Z4 tubes in parallel, and the massive filter choke mounted in the middle of the chassis. The section turns on and off automatically while switching between television and radio modes. The smaller transformer and the single rectifier tube that sits right on its top cover, are responsible for the audio section of the TV and the radio receiver. The field coil of the speaker is used as a filter choke for that section. The rest of the power circuitry is collected on the power chassis as well, including all the filter capacitors on the top of the chassis, and a set of the ceramic bleeder resistors underneath:
Some of the resistors are tapped to provide all the needed negative voltages. All of that explains such a big number of pins/wires in the interchassis connection.
The performance of a functional and properly-aligned Leningrad-T2 is impressive due to the declared relatively high grade of the set for the time, and mostly due to the pretty high-definition 625-line standard:
And some video as well (
clickable):
