AnalogTV recreates the complete analogue television chain — broadcast camera tube, composite signal encoding, RF transmission, and CRT phosphor display — simulated from physical first principles

Not a vintage filter

Not a post-process effect

A working simulation of every stage of broadcast television, from the camera neck to the phosphor screen.

THE COMPLETE BROADCAST CHAIN

Not AI, Not a Filter, the Real Thing.

Every frame passes through the same stages as a real television signal

A camera tube model — Image Orthicon, Plumbicon, Vidicon, or CCD — captures the scene with its characteristic lag, halation, and MTF response

The signal is composite-encoded to NTSC, PAL, or SECAM standards, then decoded through the same mathematics a real television receiver performs

A Metal GPU fragment shader renders each frame onto a simulated CRT phosphor display at 60 fps.

EIGHT PHOSPHOR TYPES

P22 colour television

P31 oscilloscope green

P45 white sub-millisecond

P4 B&W television

P3 amber radar

P7 dual-persistence radar — white flash fading to yellow-green afterglow

P11 deep blue photographic

P24 cyan-green flying-spot

Each calibrated from manufacturer datasheets and IEEE literature

Each shifts the IIR decay constants, rendered colour, and shutdown spot tint independently.

SERVICE MENU

Access the hidden service menu to make adjustments a television engineer would use: RGB drive and cutoff, convergence, focus voltage, G2 screen voltage, purity, HV regulation, and degauss

Every control operates at the physics level — changing focus changes the modelled electron beam diameter, not a software blur.

MAGNET

Press a virtual permanent magnet against the faceplate and watch the shadow mask magnetise

Drag to paint a continuous smear of purity damage across the screen

The magnetisation field persists across restarts

Degauss triggers the PTC thermistor coil sequence and clears it over 1.8 seconds.

TUBE AGEING AND SHUTDOWN

Cathode emission falls with use

The screen accumulates burn-in at sustained high-brightness areas

Shut the set down and watch the EHT bleed, beam defocus, and phosphor decay to darkness — with optional HV arc sounds.

14 TEST PATTERNS

SMPTE and EIA colour bars, pluge, crosshatch, multiburst, zone plate, flat fields, and more

Every pattern is generated mathematically in real time.

TECHNICAL SUMMARY

- Metal GPU rendering at 60 fps

- NTSC, PAL, and SECAM composite encoding and decoding

- Eight phosphor types from primary source measurements

- Four camera tube models with authentic lag and MTF physics

- 14 test patterns generated in real time

- Shadow mask magnetisation with 128×128 persistence texture

- IIR phosphor decay with per-channel time constants

- Aperture grille, shadow mask, and slot mask geometries