If you want to keep that Type 545B running flawlessly I recommend you perform a total re-cap of the electrolytic capacitors in the PSU. I've done a similar Type 535A as well as two Type 547's, a Type 503, a Type 516, and numerous others. Yes, it's a daunting and time consuming task but the results are worth it. I posted a link below of a recent restoration of a Type 516. The methods used can easily be applied to your Type 545B. If you have questions I'd be glad to answer them.
https://teanonymous.com/f1/viewtopic.php?t=246
Yeah, (aside from wax paper caps) I've think I'm out of favour now with shotgun re-caps unless I'm restoring something for fun just to sell it on again, like a stereo. Especially with the Tek, I'd feel obligated to install pricey premium quality replacements rather than the usual decent quality 'no-names' I keep on my shelf. Having tested a few hundred caps now from the 40's to 60's and some newer or older, I've learned the visual signs and can usually predict which ones are going to fail, I would say, with a 90% accuracy now just from looking at them. Perhaps the only caps that catch me out are new-old-stock electrolytics which can look perfect, measure perfect, and yet fail a leakage test.
I'm not sure what the magic formula is why some 1960's electrolytic caps have stood the test of time perfectly, while others have degraded when not even having been used, still in original packaging, but one thing has been absolutely for sure, if there is even the tiniest evidence of discolouration or weeping on the electrolytics, they have always failed on the cap tester.
Can't speak for every tek, but my 545B caps are most likely all perfectly functional still. The only fault I know of currently is one resistor out of tolerance thanks to a previous owners kind mark-ups in the wiring diagram.
I think maybe this one has had light use. I'm not going to do a recap though until I see some evidence of degradation, visual or symptomatic. The components tek used were just too good, and 1960's is the oldest era I've found of electrolytics where they can still be healthy in the 2020's. I've yet to find a 1950's electro that wasn't buggered, so I also judge by age prior to doing a full recap. Loved your restoration thread by the way. I will be referring to that when I need to do some work on mine.