Friend given a Revox open reel and Tascam 4 track - suggestions be we power them up?


https://imgur.com/gallery/pRZYyeo

A friend was given 2 older open reel decks and thought I’d ask what to do before powering them up and testing?

The only open reel tapes I have to test with are masters (I want to transfer to digital, but I imagine it wouldn’t be a good idea to try them on the deck before we know it’s working properly.

Any suggestions where to get them refurbished in the NYC area?

any idea what they are worth once refurbished? I’m trying to convince him it might be worthwhile to invest some money.
emailists
a real tune up on either will start at $300. Do Not risk a master on either. Buy a prerecorded tape at a used music store , NYC ….to check…..

 
Listen to tomic, not to fuzztone. Both decks are worth restoring if they work. Check eBay for prices and I have parted them out for good money too. Get a pre-recorded tape to test, don't use the masters.