This military 7603N has been sitting under bench 2 and behind the scope cart for nearly a year. When I purchased the 7904 it got kicked off the scope cart and basically forgotten. So today I pulled it out, dusted it off, and powered it up. Came up fine except the left 7A15A plug-in had noisy attenuator switch. IPA to the rescue.
I've not done much to this scope other than knock out the dents in the covers and re-paint. Checked and adjusted the +50V reference and cleaned any noisy pots/switches. Burned it in several times and called it good.
I wanted to re-cap it but it looked like getting to the PSU was going to take some major disassembly. So I left it. Well all I had to do was RTFM and discovered that the entire PSU pulls out the back after removing 6 screws. The last pix shows it partially pulled out. There's a bunch of connectors that have to be pulled so I didn't go any further. But yes, I'm going there. It's going to get a PSU re-cap. And we can debate the merits or stupidity of doing that ad nauseam but I'm convinced for long term reliability it's the right thing to do.
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In the meantime it's going up on the torture rack to get some power up time.
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