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Heatercathodeshort · 27th Mar 2020, 7:36 pm

Picture taken this afternoon on a 17" Murphy V310, probably one of the best 405 line receivers of the mid 50's period.
The off screen shot does not do justice to the superb picture that sports 100% interlace. It is pin sharp with a high level of usable contrast making it difficult to resolve at full speed with digital cameras. The original Mazda CRM172 aluminised tube certainly gives a good account of itself. One of the better Mazda CRTs.
This service area model does not incorporate vision AGC, gain being controlled via two preset sensitivity controls. One for Band 1 and one for Band 3. The DC conditions are maintained and it shows! 52 years old. Amazing. John.

27th Mar 2020, 7:36 pm	#61
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: 1946 Why 405 lines? Picture taken this afternoon on a 17" Murphy V310, probably one of the best 405 line receivers of the mid 50's period. The off screen shot does not do justice to the superb picture that sports 100% interlace. It is pin sharp with a high level of usable contrast making it difficult to resolve at full speed with digital cameras. The original Mazda CRM172 aluminised tube certainly gives a good account of itself. One of the better Mazda CRTs. This service area model does not incorporate vision AGC, gain being controlled via two preset sensitivity controls. One for Band 1 and one for Band 3. The DC conditions are maintained and it shows! 52 years old. Amazing. John. Attached Thumbnails