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Old 9th Sep 2019, 9:25 am   #4
Heatercathodeshort
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Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: Dulwich Museum Television event and sale

Thanks to everyone that attended the television event.
The two Murphy receivers in the workshop were running from 405 line VHS tapes I recorded in 1984/85 with a 405 line system A modulator supplying the signals from a Ferguson FV26D VHS VCR.

We were probably the only guys in the World that were watching 405 line programmes on a pair of 1957 Murphy V310 series, the 17" model being the much rarer light oak cabinet version, and it's big brother the V320 21" receivers side by side! If you include the V310 in the main television display, that makes a total of three making the likelihood even less!

In the darkened room just off the workshop housing the early 1920's wireless and the much later communications receivers [looked after by Phil Moss] I installed the 1950 Bow Decca projection/radio console [from the main display] together with my own, very diminutive JSF large screen projection receiver. Both performed extremely well producing very watchable pictures from the 405 line tapes throughout the day.

The Decca's display approached that of a CRT receiver of the period and viewed at the correct distance, the results were impressive. These projection receivers from the early 50's were never intended for general home use. They were designed for the posher hotel TV lounges, golf clubs and large country houses etc where the viewers were around 20ft from the separate screen or self contained receiver, such as the Decca itself.

The JSF [J.S. Feilden] produced projection receivers down in Devon. They obviously had an excellent team of designers confirmed by the very small size of the chassis and it's excellent construction and layout. The model displayed dates from 1954 the appearance of which can be seen in the pictures.The chassis measures 10 inches wide, 18" long and just over 8" high complete even down do the loudspeaker.
The picture at the museum was projected onto a vintage white cine screen provided by my fellow television curator, Peter Sanders incorporating powdered glass reflective 'beads' to improve picture brightness. It is surprising how large a picture can be obtained at reasonable brightness.

In the main television room we had all the receivers showing vintage 405. The 1938 7" Marconi, equivalent to the HMV 905 worked all day despite requiring further work to complete. The 3/2 CRT has a massive ion burn at it's centre but does not distract from the performance of this 80 year old television receiver. The Murphy A56V 9" 1938 console also performed well but there had to be one party pooper..
The EHT/mains transformer melted in the Pye D16T. Mike Barker kindly removed the power supply chassis and if all goes well a rewound transformer should be available in due course.
A good selection of sandwiches,teas coffee etc was provided by Eileen and the weather was just about perfect for the day.
Thanks everyone, you made it a great day. Regards, John and Peter.
PS I was so busy on the day that I did not have the time to take any pictures! Please post any you have. J.
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Last edited by Heatercathodeshort; 9th Sep 2019 at 9:33 am.
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