by Rob-NYC »
Sat Jan 16, 2016 4:34 pm
Goat, as in our previous encounters the answers to your questions depends on your technical comfort zone.
-The first Wurlitzer wallboxes used the same numbering system as Seeburg (A1-B1) . Beginning with the 2200 they went to their own choice (A1-A2). The later boxes can be used interchangeably by renumbering the pages.
- Do not assume that the stepper will "just work" because it looks OK. Chances are you will need to at least clean the contacts on relays and wafer. The wipers used metal bearings so the swelling problem does not exist -but old oil may have to be removed.
-First make sure the wallbox reliably puts out proper pulses. After thorough cleaning and lubing, connect a 28volt bulb between the 25 volt source and signal terminal and make a number of selections. You should see consistent blinking with one gap in between the latter and number trains.
-As for cable length, I have a location where the distance from machine to the first wallbox is just over 130ft. For that I used 16-3 cable. The signal conductor carries negligible current, but that was the easiest cable to buy. For runs under 100ft, 18-3 will be fine and under 30ft even 20ga will work.
_ i can't advise about a wireless link in your case, but understand that this system is based on a DC link. For a wireless link to work the pulses will have to be converted to an AC signal in the audible range, transmitted and then used to trigger a relay the closes the circuit in pulses corresponding to the selection made. NBD technically, but unless the wallbox is going to be moved around it would seem simpler to just run the cable.
I set up this sort of system for a person who owned a large townhouse on Riverside Drive back in 1990. The juke was in the room next to his swimming pool in the basement and he wanted to be able to use the wallbox for parties on the roof. I used a small packaged oscillator with 1khz output to modulate the transmitter and had to build a small DC amplifier to trigger a transistor that operated a relay at the juke. Fortunately, his whole building was wired for sound, so all I have to do was run a short cable from the juke to the main amp and provide switchover.
The wireless system worked but wasn't portable and the osc-transmitter had to be in a fixed location inside the elevator room on the roof bulkhead. At one point he forgot to bring in the wallbox (or was too high) and it got rained-on. Only the title strips suffered any lasting damage. This was for a fellow stock investor and I owed him a few favors...he paid me anyway.
Rob-NYC
"If we believe absurdities, we shall commit atrocities" -- Voltaire