Continuing the following thread: http://forums.qrz.com/index.php?threads/fun-with-a-henry-2k-d.445508 I pulled the T/R relay today and tested it. The relay slightly pulls down, but not enough to make contact on the N/O side. The coil is badly corroded under the tape and I think it's just too weak to pull in. Might be burned up, who knows. The relay was also made by Kurman, not Magnacraft, and seems equally unobtanium. I've reviewed the Guardian relay kit produced by Henry and $140 seems a bit steep for two $10 relays. It appears that one relay is assigned for input RF switching and the other for output. I'd like to figure out how it's wired up and put one together myself, or use one 3PDT replacement relay. I'm concerned that having two relays replace one may cause issues with delayed switching, so my inclination is to use one relay. There is also not much room in the first-gen 2K-D cabinet. At some point, this amp was set up to use 3-500z tubes, but there is no bias zener present. Any ideas on where to put one? Any relay replacement recommendations?