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Cub Conversion: Difference between revisions
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This circuit was created by [[Rob Sprowson]], and a set of 18 duly created in May 2000, together with a new, steel monitor rack sized so that the monitors would fit neatly on it. The station mains wiring was upgraded so that the wall behind the rack had enough mains sockets to plug everything in directly (see the [[G/046]] page for the tale of how this was done]], and YSTV could now see every point of the vision path in colour. The old [[Cotron]] black and white monitors were cascaded to become part of the [[NaffoCue]] system. | This circuit was created by [[Rob Sprowson]], and a set of 18 duly created in May 2000, together with a new, steel monitor rack sized so that the monitors would fit neatly on it. The station mains wiring was upgraded so that the wall behind the rack had enough mains sockets to plug everything in directly (see the [[G/046]] page for the tale of how this was done]], and YSTV could now see every point of the vision path in colour. The old [[Cotron]] black and white monitors were cascaded to become part of the [[NaffoCue]] system. | ||
There was even a service guide produced, and the | There was even a service guide produced, and the whole project cost around £400, including buying the custom circuit boards. | ||
A minor error on the original converters was later corrected in November 2000 by the insertion of a small buffer board soldered directly on the back of the input connectors. As Rob has graduated by this point their installation was a little rushed and the monitors weren't properly adjusted for good colour balance across all 18 monitors. | A minor error on the original converters was later corrected in November 2000 by the insertion of a small buffer board soldered directly on the back of the input connectors. As Rob has graduated by this point their installation was a little rushed and the monitors weren't properly adjusted for good colour balance across all 18 monitors. | ||
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A later revised buffer board was designed in 2004, and fitted in May 2004 to one selected monitor. It both offered an extended temperature range but also featured an 8 pin microcontroller which would generate a fake black picture should the source video be unplugged - minimising 'whistle' potential. | A later revised buffer board was designed in 2004, and fitted in May 2004 to one selected monitor. It both offered an extended temperature range but also featured an 8 pin microcontroller which would generate a fake black picture should the source video be unplugged - minimising 'whistle' potential. | ||
==VGA converters== | ==VGA converters== | ||
Although a very good idea, the Cub monitors suffered from a lack of regular maintenance. Their tendancy to get quite hot in continuous use (they have been seen in use as Pizza warmers) meant that some key components aged prematurely but were not replaced, leading to tell tale picture artifacts (too bright, too dark, oversaturated, etc...). | Although a very good idea, the Cub monitors suffered from a lack of regular maintenance. Their tendancy to get quite hot in continuous use (they have been seen in use as Pizza warmers) meant that some key components aged prematurely but were not replaced, leading to tell tale picture artifacts (too bright, too dark, oversaturated, etc...). | ||