Here are the pictures of the 547 unload. It was a beautiful day, day off work, vintage gear, perfect opportunity to take everything out of the truck and put it inside and look it over in the late afternoon sun in the driveway - and ruin the neighbour's cigarette smoking on her front porch. Looking back at the pictures, apparently I never took one of the scope itself. It was the first to go in the house and I just picked it up and brought it in and that was it, as was the case with the box of plugins and the other miscellaneous equipment. Things got more interesting with the lab cart and that's what prompted me to start taking pictures:
The two plugins were securely tightened down in the cart and the drawer was empty when I picked it up and yet
something was shifting and sliding around in there and it did it again when I lifted it out of the back of the truck so I finally looked it over to see what was going on and I could see a BNC connector peeking out from beside the drawer when the drawer was pulled open. This didn't come with anything in the drawer when I got it so a probe or something had fallen out of the drawer and landed inside the body of the scopemobile itself at some point during its life before I got it. From checking over the drawer, it looked like it would be tools and a lot of fasteners to take it out and put it back in vs. unscrewing and removing the two plugins and reaching in from the top so that's what I did.
It's interesting to look at the different build styles. There's Tektronix with ceramic strips and Tektronix with printed circuit boards like this 1A1.
One of the other interesting things with vintage equipment are the old service and asset management tags, calibration stickers etc. that speak to the history of the machine. From a quick search, it looks like Aldonics is gone.
This is the third party Nelson-Ross audio frequency spectrum analyzer. They clearly went with their own design and finish for the plugin's face rather than adopt Tektronix's style.
Fingers crossed that none of the IF transformers have deteriorated silver mica capacitors in them. If they do, hopefully the values are published. The top which is where the wiring side is on this one resembles Tektronix ceramic strip construction but uses plastic terminal tie strips instead of ceramics.
Luckily it looks like there was a full set of manuals with the 547. I wasn't as concerned with the Tektronix equipment since that era is well documented but I wasn't looking forward to trying to find manuals for the Nelson-Ross plugin online. I haven't dug into it yet but hopefully it's got a schematic with values on it in case any of those IF cans does have bad capacitors. It also looks like the same two IF transformers got used repeatedly from the part numbers printed on them so hopefully at least one of each is in good shape and measurable if I need to deal with this problem.
Finally, this is what I found after removing the two plugins from their holders and sliding the drawer out as far as it would go so I could dig around inside. The gating adapter clearly goes with the Type O plugin that was in the top of the box of plugins. I'm not sure what the RC standardizer would be used for - that's not something I've encountered before, current or vintage.