Television Receiver - Disc Type Model 1
Plew Television Ltd.; Surrey
- Produttore / Marca
- Plew Television Ltd.; Surrey
- Anno
- 1934
- Categoria
- Televisore (TV) / Monitor
- Radiomuseum.org ID
- 347991
Television Aug 1934, Page 363
Television Aug 1934, Page 363
Television Aug 1934, Page 363
- Gamme d'onda
- Gamme d'onda nelle note.
- Tensioni di funzionamento
- Alimentazione a corrente alternata (CA)
- Altoparlante
- - Questo apparecchio richiede altoparlante/i esterno/i.
- Materiali
- Mobile in legno
- Radiomuseum.org
- Modello: Television Receiver - Disc Type Model 1 - Plew Television Ltd.; Surrey
- Forma
- Soprammobile verticale (sviluppato in altezza; no cattedrale, sin decorazioni).
- Annotazioni
-
Model No 1.
Television receiver using a Nipkow disc and a glow discharge lamp for the BBC, 30-line of experimental television transmissions.This was the basic version with the motor and disc alone in a cabinet and required the connection of a wireless set receiving the BBC Midland Regional transmitter (Daventry) on the vision on 261 metres, and of the accompanying sound on 398 metres.
it incorporated a stroboscopic speed indicator which enabled non-technical users to obtain accurate synchronisation.
- Prezzo nel primo anno
- 10.00 GNS
- Bibliografia
- Television Aug 1934, Page 363
- Autore
- Modello inviato da Gary Cowans. Utilizzare "Proponi modifica" per inviare ulteriori dati.
- Altri modelli
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In questo link sono elencati 3 modelli, di cui 3 con immagini e 0 con schemi.
Elenco delle radio e altri apparecchi della Plew Television Ltd.; Surrey
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Extracted from Television Dec 1934.
Mains Synchronising
Most mains nowadays are frequency-controlled A.C., and though not interlocked with those used at the transmitter, are in themselves quite steady enough to be used to run a receiver, though one must be prepared for a slow acceleration or retardation.
Such variations will be very slow, and, of course, may happen at either the transmitting or receiving end. To overcome the difference in frequency of the two mains an ingenious system has recently been put on the market by the Plew Television Co.
It consists, see Fig. 1, of an ordinary universal motor M, which is fitted to an 8-tooth wheel and pole-pieces, S, very similar to the 30-toothed synchroniser. On the other side of the synchronising unit is a fibre bevelled wheel, F, which makes a frictional contact on D at the point P, and the movement of rotation is transferred to D, which is mounted on the same shaft as the disc or mirror drum.
Now if the diameter of F is equal to twice the radius of PC, D and F will rotate at the same speed, on the other hand, an increase or decrease of the radius of PC will either cause D to run faster or slower.
To effect the alteration of the radius PC, the driving motor is on sliders, and its position can be adjusted. Thus, though the speed of F is controlled by the A.C. mains by S, the final speed of D can be adjusted to that of the transmitter.
Of course, M could be a synchronous motor, though it is not easy to build a single-phase, self-starting motor, of small dimensions and power.
It should also be noted that there are a few makes of synchronous motor on the market in the form of gramophone mechanisms, which, though they generally run at 1,500 r.p.m., could be quite easily adapted to the system developed by the Plew Company.
Television Dec 1934, Page 534
Gary Cowans, 20.Jul.23