Went to the first hamfest in a couple years on Saturday, and found a poor KWM2A that was the former residence for a mouse family. I ran across the gentleman selling this first thing in the morning, and he was asking $500 for the radio, power supply, and the remote VFO 312-B5. All had been stored in a garage for years and where very dirty, with the previously mentioned inhabitants. I decided to pass, but was thinking about it all day. Was getting ready to leave and decided to see if it was still there and it was. Well after a bit of negotiating, I now own it. I dragged it home and spent the day removing mouse turds and years of nicotine. I think that the nicotine coating actually saved this old radio. It cleaned up pretty well and I am pretty optimistic about getting it on the air. I will replace all the electrolytic and paper caps before I fire it up. Here are my first observations/questions for you guys: 1. Some of the tubes do not match the markings on the chassis ie V7 has a 6DK6 vs 6DC6 but they all look to be a good substitute according to this page https://www.nostalgickitscentral.com/info/tubexref6.html. Why do people sub tubes and not just use what Collins had designed it for? 2. This one has me really stumped. There is a 10uF Electrolytic cap paralleled to ground with a .01uf Ceramic disc cap C263 from pin 7 of tube V1 6AZ8 (first mic amp). It was obviously not a factory cap, but very old Sprague "Atoms". I have not read thru all the service bulletins, but was this a standard mod? I thought at first perhaps it was a black beauty cap that somebody had read the stripes wrong at first, but now I think it might be a mod. Any thoughts? Here is the schematic I think I am going to order the Hayseed hamfest can cap before I fire it up.