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raven007
Junior Member
Last Activity: 02-17-2020, 11:01 AM
Joined: 07-17-2019
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  • raven007
    replied to Spectrum 875 blew up PM2
    Yeah. Although after starting you don't need it because the arc spends so little time at the zero cross. Sine wave AC TIG tends to need it to keep the arc lit as the arc voltage rides the sine and spends a comparatively long time below arc sustaining voltage....
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  • raven007
    replied to Spectrum 875 blew up PM2
    This one uses Mini skiip 3/2 power modules. They are proprietary parts in a standardized case. No datasheets available. The primary interconnect is not a super complicated board. Those are the only proprietary parts associated with the board and they bolt on. At some point i will draw a schematic....
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  • raven007
    replied to Spectrum 875 blew up PM2
    yes definitely. I could build a 2050 from scratch if I really was glutton for punishment. It wouldnt work unless you banged on the case really really hard. (i was never able to replicate this "fixed" mode). The power light would just flicker rapidly and the main contactor never pulled in....
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  • raven007
    replied to Spectrum 875 blew up PM2
    Thanks. I think I will start and work my way all the way through again. Something had to cause the failure. I refuse to pop a new module on without finding it.

    In other news I scored a free 2050 that had input/rectifier board issues which were easily resolved. As soon as i get a torch...
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