25-06-2019, 05:42 PM
(This post was last modified: 25-06-2019, 05:59 PM by peter scott.)
I went to see this set today and am very grateful to Mrs Bennett-Levy for allowing me to remove the back and take photos. I have added the set to my dating list.
Although very bulky it is on castors and quite easy to move around. For those unfamiliar with HMV902 it is the HMV equivalent of the Marconi 703 Mastergram and whilst very different in appearance it has the same functionality and sold originally for the same price. Unlike the 703 the 902 came in two versions. The 902 used a 9" Emiscope 6/5 CRT viewed through a magnifying lens. The later 902A used the 12" Emiscope without the lens.
Whilst this set is complete and very original it would require some fettling to become functional. Looking at the magnified screen it gave me the impression of being larger than the 12" image.
All the first generation EMI sets use essentially the same TRF vision receiver. The 703 uses the same timebase chassis as the 702 an 901 television only sets but the 902 shares the same timebase as the 900. This is essentially the same circuit as in the television only sets but built on a rectangular chassis instead of the triangular one. So the 902 is basically a 900 with added gramophone.
In general there are not many signs of repairs, only a very obvious blue electrolytic in the timebase that appears to have disconnected at one end. The EHT transformer is in its original black pitch.
I understand that the set is now sold to a UK dealer.
Peter
Although very bulky it is on castors and quite easy to move around. For those unfamiliar with HMV902 it is the HMV equivalent of the Marconi 703 Mastergram and whilst very different in appearance it has the same functionality and sold originally for the same price. Unlike the 703 the 902 came in two versions. The 902 used a 9" Emiscope 6/5 CRT viewed through a magnifying lens. The later 902A used the 12" Emiscope without the lens.
Whilst this set is complete and very original it would require some fettling to become functional. Looking at the magnified screen it gave me the impression of being larger than the 12" image.
All the first generation EMI sets use essentially the same TRF vision receiver. The 703 uses the same timebase chassis as the 702 an 901 television only sets but the 902 shares the same timebase as the 900. This is essentially the same circuit as in the television only sets but built on a rectangular chassis instead of the triangular one. So the 902 is basically a 900 with added gramophone.
In general there are not many signs of repairs, only a very obvious blue electrolytic in the timebase that appears to have disconnected at one end. The EHT transformer is in its original black pitch.
I understand that the set is now sold to a UK dealer.
Peter
