Restoring vintage electronics and the word affordable are rarely used in the same sentence. Not trying to be a hard ass but it's just a simple truth. This stuff is old, averaging 45 years old. Most times it's been abused either by the owner or ham fisted repairmen or both. The adage of "Time is money" applies here. The trick is finding someone vetted who is an enthusiastic supporter of restoring vintage electronics, not really doing it to pay the bills. I say this because someone who is earning their living will do what needs to be done to "fix" it, not really restore it because of they just cannot charge enough to make up for all the time it takes. There are levels upon levels of "restoration" work to decide on. Just caps? Caps and use films for low value electrolyics?, All new transistors on the amp boards? All new film resistors to replace the carbon composite resistors that drift out of spec? Replacing the power switch or trying to salvage the old one? Taking apart switches like the main speaker switches? cleaning them? replacing them? etc..etc..etc. A deep dive can be pretty expensive in time.. not so much in parts. Before you talk to someone, you should decide just how far down the rabbit hole you are willing to go as far as work goes. My own suggestion is all new caps .. like for like.. and I would recommend replacing the amplifier power transistor as a matter of course. Sucks to do all the work of caps only to have pull it all apart again soon because the transistors were strained and gave up :/ And yes, you can ask me why I know this. The power switch at the minimum should be replaced or rebuilt if you can. The replacement is faster. There are arguments about the main speaker switches. New is available and they are cheap. It's time consuming to pull the old out and put the new in but you will not have an issue in your life time again with it. Many just soak the hell out of them with DeOxit. I'm not a fan of that process. I have in some cases, take the switch out and rebuilt it ( cleaning, DeOxit grease) and put it back. Thats a personal choice or maybe a budget choice. All the switches and pots will need a cleaning as a rule. Be wary of someone who wants to drown a pot in DeOxit. That can cause the OEM grease to semi liquify and then migrate to unexpected places later on. AS you an see, the more conversation you can have with the tech, the more realistic expectations are set on both sides.
