Dan,
I just saw the pics of your Zenith Royal "R" TV. Great set, from what I've heard (it's a Zenith from when the name meant Zenith, and the company still handwired their sets in Chicago--need I say more?). Hope you don't have too much trouble getting it going.
BTW, I like all things Zenith (the older models, that is--before the company was bought out by Gold Star). Have a couple old Zenith radios (can't collect old TVs anymore since I moved to a small apartment four years ago, so now I'm collecting small radios). However, I used to collect old TVs when I lived in a house in the suburbs. A good number of those sets were Zeniths, and many of them worked or were repairable without much trouble. Had a 1963 Zenith 23" b&w console in the early '70s (trash day find) that I retubed; it worked great and sounded much better than most TVs of that period (it had the 6BN6-6BQ5 audio system, with tone control IIRC, and a 6x9 oval speaker). I'm sorry to say, however, I had to get rid of that set when I moved (the first time), three years after I got it working so well. Nearly broke my heart to do it, especially after all the work and money I put into it
but I was moving to a house where I wouldn't have any room for it, so I had no choice.
Those older Zeniths were built to last. Once you get yours working, it should serve you well for many years to come. These older sets are much, much better than the faux "Zeniths" coming off the assembly lines in Korea these days. In fact, I read, in one of the AK television forums recently, that today's Hitachi TV sets are actually built by "Zenith" and sold under the Hitachi brand as well, so these are nothing more than rebranded "Zeniths", with all the problems that brand has today.
I've had a liking for Zenith home-entertainment equipment for years, but since the company's reputation (and their products' reliability) have gone down the drain and are now worth nothing, I wouldn't buy anything with the Zenith name or logo on it today. The company had better shape up or else, IMO, it will find itself out of business in a very short time. People don't stay with companies that do not make reliable products.