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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Paging Jim Yanik - 7000 series plugin question
Jim (and other Tek alumni),
Why is there no polar display or vectorscope plugin for the 7000 series? Did you ever hear of a third party that made one? Thanks, Michael |
#2
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Paging Jim Yanik - 7000 series plugin question
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#3
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Paging Jim Yanik - 7000 series plugin question
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#4
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Paging Jim Yanik - 7000 series plugin question
Jim Yanik wrote:
msg wrote Jim (and other Tek alumni), Why is there no polar display or vectorscope plugin for the 7000 series? Did you ever hear of a third party that made one? 7000 series were primarily Laboratory scopes. At that time frame,vectorscopes were the 602 X-Y display(used in Ampex tape machines,driven by a 650 series TV monitor) Did the 650 then provide an I and Q signal to the 602 X-Y display to produce the polar plot? as another poster mentioned,7000 series X-Y displays were done with vertical plug-ins in both Vert and Horiz slots. If I were to construct a 7000 vectorscope plugin, what should I look for to cannibalize for prototyping? Was there a specific user-prototyping plugin module? Perhaps I should shoehorn an existing color processing board from some monitor into the module? I would like to have line/field selection; suggestions for make and model of any video device to cannibalize that includes such sync processing circuitry appreciated. With limited shelf/rack space, I have room for only one scope and hope to do a plugin solution rather than build an outboard box that drives two vertical plugins. Michael |
#5
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Paging Jim Yanik - 7000 series plugin question
msg wrote in
: Jim Yanik wrote: msg wrote Jim (and other Tek alumni), Why is there no polar display or vectorscope plugin for the 7000 series? Did you ever hear of a third party that made one? 7000 series were primarily Laboratory scopes. At that time frame,vectorscopes were the 602 X-Y display(used in Ampex tape machines,driven by a 650 series TV monitor) Did the 650 then provide an I and Q signal to the 602 X-Y display to produce the polar plot? yes.Later versions used a 1420 vectorscope,next to a 528 waveform monitor. (then 1720/1730 combo,or a single 1740/1750 dual wfm/vector scopes. as another poster mentioned,7000 series X-Y displays were done with vertical plug-ins in both Vert and Horiz slots. If I were to construct a 7000 vectorscope plugin, what should I look for to cannibalize for prototyping? Was there a specific user-prototyping plugin module? 7A17,IIRC. It was a very simple differential amp with a large perfboard area for circuits,with a blank faceplate. not too common. Perhaps I should shoehorn an existing color processing board from some monitor into the module? a 650's board(s)will not fit. I suppose you could use the circuitry from a 1420 vectorscope.All the vector circuits were on one board,but it was 1.5 times as large as the entire 7A17. there probably are modern TV decoding IC sets that could do the whole job on the 7A17's perfboard area,but I could not recommend any. And you still will not have a vector graticule for the CRT. I would like to have line/field selection; suggestions for make and model of any video device to cannibalize that includes such sync processing circuitry appreciated. With limited shelf/rack space, I have room for only one scope and hope to do a plugin solution rather than build an outboard box that drives two vertical plugins. Michael If I were you,I'd look for a 1720(half-rack width) and a half-rack scope of some sort. -- Jim Yanik jyanik at kua.net |
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