I'm glad to see you obtain a quality brand. Keep in mind though, that certain model Teks are more difficult to maintain/repair than others. The 465B and similar were solid units, popular because they are easy to maintain/service as were many of the Beaverton models. The Sony/Teks were alright and some of the 2200 line were ok, but nothing special. Your model is a ruggedized military version, using specialized parts in the HV section, including thick-film resistors, and proprietary Tek-made ICs that likely, are no longer available. Given that info., repairing it could be a real chore and a spare/parts unit would be handy to have. Here's some info. for you to download:TEK 2335 literature/help tips
There are hoardes of quality, used scopes up for sale/auction and as hobbyists, we each need to do our homework prior to purchasing as to which brands and models will fill our needs and yet provide relatively easy servicing/maintenance/parts availability.