R7903: Difference between revisions
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==Internals== | ==Internals== | ||
Early R7903 (SN | Early R7903 (SN B149999 and earlier) use the 670-2532-00 A11 horizontal amplifier board and have issues with horizontal aberrations for sweep rates of 1 ns/Div or faster. After discovery of the issue modification kits (040-0801-00) that replace the horizontal amplifier board were offered. For more information see the [[Media:Tek 067-0657-00 with schematics.pdf|manual]] of the [[067-0657-00|067-0657-00 Normalized Ramp Generator]] that was use to investigate this issue. | ||
==Pictures== | ==Pictures== |
Revision as of 11:14, 15 November 2023
The Tektronix R7903 is a rackmount version of the 7903, a 3-slot 7904 that takes only one horizontal plug-in. Otherwise, aside from being rackmount shape, it the same as a 7904.
Key Specifications
Bandwidth | 500 MHz |
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Fastest calibrated sweep | 500 ps/Div (with 7B92A, other time bases "uncalibrated for first 60 ns") |
Acceleration voltage | 24 kV |
Links
- Anchorite Nevada Instrumentation Trailer with over 100 R7903s (photo and article @ vintagetek.org)
Internals
Early R7903 (SN B149999 and earlier) use the 670-2532-00 A11 horizontal amplifier board and have issues with horizontal aberrations for sweep rates of 1 ns/Div or faster. After discovery of the issue modification kits (040-0801-00) that replace the horizontal amplifier board were offered. For more information see the manual of the 067-0657-00 Normalized Ramp Generator that was use to investigate this issue.
Pictures
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Option 4: brighter, smaller scan CRT
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Option 4: brighter, smaller scan CRT
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R7903 rear
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R7903 Option 4 trace
Components
Some Parts Used in the R7903