29-07-2015, 07:26 PM
In 2012 I saw a blurry photo of a 7633 advertised on ebay. I successfully bid and went to collect what turned out to be a 'scope which had been bashed so hard on the front that one of the steel control shafts had sheared. Many broken knobs, and also electrical faults. However, like Refugee, I ploughed on and was rewarded by a 'scope with a really attractive display and oodles of class. I learnt that the 7000 series, setting aside the flexibility of being able to swap plug-ins, would also allow a "vertical" plug-in to be used in the "horizontal" position: the x and y interface to the mainframe is standardised*, so you have a calibrated x display driven by a y amplifier.
Next up came a 7623A restoration, another ebay non-worker, followed by a second 7633 and finally, a second 7623A. By this time I'd learnt to try find new homes for these scopes, as I believe test equipment shoud be used on a reasonably regular basis.
Finally, collecting / restoring some interesting plug-ins, including a 7CT1N curve-tracer and a 7A22 differential amplifier with a mind-boggling CMRR.
BTW, if anyone wants any "spares" for these, I have an almost complete set of boards for a 7603, plus parts-donors for the 453's
John
*50mV /div differential into 50 ohms
Next up came a 7623A restoration, another ebay non-worker, followed by a second 7633 and finally, a second 7623A. By this time I'd learnt to try find new homes for these scopes, as I believe test equipment shoud be used on a reasonably regular basis.
Finally, collecting / restoring some interesting plug-ins, including a 7CT1N curve-tracer and a 7A22 differential amplifier with a mind-boggling CMRR.
BTW, if anyone wants any "spares" for these, I have an almost complete set of boards for a 7603, plus parts-donors for the 453's
John
*50mV /div differential into 50 ohms
Radio Museum collection: Here
