Yes, relays with snubbers across the contacts to prevent arc damage when the contacts open. I have a USB controller board coming in a couple weeks to remote control the load bank(s) that also has a K thermocouple converter for plate temperature and protection. I like the resistors/relays because it doesn't add a second active circuit while I'm testing. I could use solid state switching, but I like the click-click of relays.
Its a standard 1/2/4/8 load bank using 15 8K/25W resistors (11W per step at 300V in). The plate is a 1/4" 6061 spreader with 4 1/4-20 holes for bolting a heatsink, I currently am testing with a 1" fin block about half the size of the spreader plate greased and just sitting on the plate with a fan on it for the last 12 hours: 34C rise above ambient with a 100W heat load measured at the plate center. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/eab00e30-902d-48fb-a8e4-6beb1965fc05%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
