I do like the suggestion to update TV's.. I did.. Though I don't take advantage of all the updates offer..
If you decide to keep the vintage jobs you will need a Digital TV converter.. They can be hard to find now days but you can still get 'em I'd try Micro-Center or Best Buy first (or Fry's) but those are not the only places.. Amazon or E-bay may work as well.
Advantages of update: Wide Screen, Crystal clear Video (or nothing) LIGHTER both in pounds and watts (LIke 1/10th the power consumption) and I was able to modify the head banger TV box in the front of my motor home so as not to give me headaches (The pounding kind) from banging my head.....
When I bought the pawned TV for that job I measured the existing TV's width and bought one the exact same width.. not as tall, but same width.. Then modified the box it goes in so it looks factory from where I'm sitting.
I would also do an antenna upgrade: Assuming you have a Winegard "Batwing" (Sensar II or III) add the wingman (It is technically called a UHF Director array) this will improve the range of the antenna on UHF which is where most digital transmissions landed.. Still the same VHF/UHF frequencies as before but where as Analog stations loved the VHF, Digital love UHF so add the upgrade.
About 30 bucks DIH
Then inside you have a wall plate with outlet, switch, light and antenna connection..... Upgrade that to the SENSAR PRO (About 100 bucks DIY)
NOTE that these upgardes are optional but they will improve performance.
Folks may try to sell you other makes of antennas.. NOTHING MADE for sale in the USA will outperform a winegard Sensar II or III with added wingman or a Sensar IV which comes with the Wingman already in the box as antennas go and the Sensar Pro beats all competitors for the indoor module and aiming aid as well.
One footnote: If you have two TV's in the same area (Some RV's do) Make sure they are DIFFERENT makes
If you have one in front and one in back.. Those can be the same
(Remotes work only one at a time) OH and Sansui and Dynex use many of the same remote codes.. (A benefit to me as that pawn shop special was a Dynex and came w/o a remote. but my Sansui remote did everything except INPUT select)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times