Difference between revisions of "Wood & Douglas FM TV equipment"
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− | During the 1980's, Wood & Douglas produced a range of 1.3GHz FM TV equipment that gave many amateurs their first taste of microwave ATV operation. | + | During the 1980's, Wood & Douglas produced a range of 1.3GHz FM TV equipment that gave many amateurs their first taste of microwave ATV operation. Many of their products are described in their 1984 Catalogue: [[Media:1984 WD Catalogue.pdf|1984 WD Catalogue]] |
'''VIDIF'''<br /> | '''VIDIF'''<br /> | ||
− | The VIDIF was an FM TV demodulator board with an IF input of 50MHz. Separate boards were required for video de-emphasis and the sound sub-carrier. | + | The VIDIF was an FM TV demodulator board with an IF input of 50MHz. Separate boards were required for video de-emphasis (VP/D1) and the sound sub-carrier (FIF1). |
− | [[ | + | [[Media:VIDIFp1.pdf|VIDIF descriptive text]]<br /> |
− | + | [[Media:VIDIFp2.pdf|VIDIF circuit diagram & pcb layout]]<br /> | |
− | [[ | + | [[Media:VIDIFp3.pdf|VIDIF component list]]<br /> |
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− | [[ | ||
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'''VP/D1'''<br /> | '''VP/D1'''<br /> | ||
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The VP/D1 was a dual function board for video pre-emphasis (for transmission use) or de-emphasis (for reception use). Links select which function is enabled. The addition of these simple boards made a big improvement to picture quality (1-2 picture grades).<br /> | The VP/D1 was a dual function board for video pre-emphasis (for transmission use) or de-emphasis (for reception use). Links select which function is enabled. The addition of these simple boards made a big improvement to picture quality (1-2 picture grades).<br /> | ||
<br /> | <br /> | ||
− | [[ | + | [[Media:VPD1p1.pdf|VP/D1 circuit diagram & pcb layout]]<br /> |
− | [[ | + | [[Media:VPD1p2.pdf|Emphasis characteristic curves]]<br /> |
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'''FIF1'''<br /> | '''FIF1'''<br /> | ||
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− | [[ | + | [[Media:FIF1p1.pdf|FIF1 description]]<br /> |
− | [[ | + | [[Media:FIF1p2.pdf|FIF1 pcb layout]]<br /> |
− | [[ | + | [[Media:FIF1p3.pdf|FIF1 component list]]<br /> |
<br /> | <br /> | ||
'''1250DC50'''<br /> | '''1250DC50'''<br /> | ||
<br /> | <br /> | ||
− | The 1250DC50 was a tunable downconverter that tuned the entire 1.3GHz band down to an IF of 50MHz. Unlike most W&D equipment, this item was only available as factory assembled and boxed item. | + | The 1250DC50 was a tunable downconverter that tuned the entire 1.3GHz band down to an IF of 50MHz. Unlike most W&D equipment, this item was only available as a factory assembled and boxed item. |
− | + | <br /> | |
+ | [[Media:1250DC50p1.pdf|1250DC50 description]]<br /> | ||
+ | [[Media:1250DC50p2.pdf|1250DC50 connections]]<br /> | ||
+ | [[Media:1250DC50p3.pdf|1250DC50 circuit diagram]]<br /> | ||
+ | [[Media:1250DC50p4.pdf|1250DC50 pcb layout]]<br /> | ||
+ | [[Media:1250DC50p5.pdf|1250DC50 alignment instructions]]<br /> | ||
+ | <br /> | ||
+ | '''WDV400/1200'''<br /> | ||
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+ | The WDV400/1200 was a 10W in, 4W out, 420 MHz to 1260 MHz Varactor Tripler. This item was only available as a factory assembled and boxed item. | ||
<br /> | <br /> | ||
− | [[ | + | [[Media:WDV400-1200p1.pdf|WDV400/1200 description and circuit]]<br /> |
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Revision as of 20:43, 22 September 2018
During the 1980's, Wood & Douglas produced a range of 1.3GHz FM TV equipment that gave many amateurs their first taste of microwave ATV operation. Many of their products are described in their 1984 Catalogue: 1984 WD Catalogue
VIDIF
The VIDIF was an FM TV demodulator board with an IF input of 50MHz. Separate boards were required for video de-emphasis (VP/D1) and the sound sub-carrier (FIF1).
VIDIF descriptive text
VIDIF circuit diagram & pcb layout
VIDIF component list
VP/D1
The VP/D1 was a dual function board for video pre-emphasis (for transmission use) or de-emphasis (for reception use). Links select which function is enabled. The addition of these simple boards made a big improvement to picture quality (1-2 picture grades).
VP/D1 circuit diagram & pcb layout
Emphasis characteristic curves
FIF1
The FIF1 was a 6MHz sound sub-carrier reception board to go with the VIDIF board above.
FIF1 description
FIF1 pcb layout
FIF1 component list
1250DC50
The 1250DC50 was a tunable downconverter that tuned the entire 1.3GHz band down to an IF of 50MHz. Unlike most W&D equipment, this item was only available as a factory assembled and boxed item.
1250DC50 description
1250DC50 connections
1250DC50 circuit diagram
1250DC50 pcb layout
1250DC50 alignment instructions
WDV400/1200
The WDV400/1200 was a 10W in, 4W out, 420 MHz to 1260 MHz Varactor Tripler. This item was only available as a factory assembled and boxed item.
WDV400/1200 description and circuit