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Hi all,New user, first post here regarding wiring an old buzzbox gift.Came to me unwired, but rewound, and I want to wire it up w/ your help.The box has different taps on the primary, and is a core type, primaries on top of secondaries.2mm copper primaries, 4mm coper secondaries, bout 30 kgs.I cant seem to figure out how this was wired, as the case only has 3 round cutouts for the (missing) push buttons.The pairing I am showing is from the rewinder, and heat shrunk together.I don't know if that is correctI am attaching a possible wiring for using a switch.I am leaving the 11 Ohm permanently connect as I think this would act an inrush current limiter when the machine is first turned on (Actually I see now that the 11 Ohm coil should be wired as the first coil in line)I'm also figuring that the 5.6 mH coils are doing the brunt of the work and tha's why I alternated them to have even range...The resistance measurements are double checked with a "Low Ohm" meter.The inductance measurements are with mid-range DMM with an inductance settingWould appreciate some helpregards,Nick

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Last edited by olNick; 22 Hours Ago at 05:29 AM.Reason: clarification on winding
Reply:Is this a simple buzz box.I guess it must be at only 30kg.?Seems odd there would be a selector switch on the primary side.Even with different supply voltage options, primaries are usually configured with jumpers.Pics of welder would be interesting, possibly helpful.Miller a/c-d/c Thunderbolt XLMillermatic 180 Purox O/ASmith Littletorch O/AHobart Champion Elite
Reply:Hi,There's only a box and cover with the switch holes. Older welders here were switched on the primary (cheaper switchgear).Very simple ac buzzboxthanx

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Reply:Usually on a buzz box the taps are on the secondary side, not the primary side. See here https://weldingweb.com/vbb/threads/6...chematic-errorMiller Multimatic 255 |
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