Re: 475 instead of 475A?
Ashton Brown <ashton@...>
Hello Steve,toggle quoted messageShow quoted text
Couple comments - BTW I have had a 475A SN B025698 for several years. Rock solid except.. for a need to retighten the BNC input mount nuts and look for bad connections at AC--GND--DC input switch. Doesn't get a lot of use, but so far turns on and just runs.
Since you mention audio - have you considered a clean 454A? larger screen than 453,4; 2mV/DIV - a usually conservative 150 MHz, as I've measured to near 200 on a couple. It has the fine trace-width which the 46x, 47x CRTs cannot equal and overall (and IMhO) built to better standards than that later series. In any of these cases - you're likely to need to pay attention to the filter caps, using an ESR meter - like the small IC-based box made by an Australian company (kit form even). I built it; it works -- and you can't really test w/out it, only guess or R&R blindly.
I admit a prejudice for the 454A especially - you really Can see the tiny wiggles on that ultra-sharp trace.. and they are not artifacts of the scope - particularly useful to filter-designers I am told - estimating the remaining octave-band noise for various designs with wonderful Russian names.
Thank you all who helped with the serial number mystery.