Mess in the lower corner is
IEC feed
thru power and feed
thru for the fans to the other 3-space rack mount panel. E-12 as surmised for
base but more for wattage and
incandescent long life version in conserving heat from output as low as possible. You guys are good, especially JD and overall all repliers!!
Lower corner is silicone insulated for the wires under a bridge to control for
wire sag from the
IEC. Messy in look but function is to ensure the wires cannot get cut in strapping bridge housing them in.
UL listed, no a prototype at the moment that could be useful on a tour as with a 48way version (photos of external lamps in entire rack used for it as opposed to lamps inside rack panel.) Totally agree with the history and how it was a funny to have to do such a thing last year. But it worked well and prototyping smaller versions.
Zoomed in mounting holes was for two lamp sockets per
circuit (prototype) in not
fitting with both 25w and 60w lamp in the space for original goal. Also looked into light
shield wlding glass viewing glass to verify all six lamps were working but not enough room so far in concept.
"Lutron (LUT-LBX) and other manufacturers make synthetic loads that can be used for the same purpose - but at higher cost - they do come with a UL listing though." Thanks, I will look into that info and in part why I'm posting.
Application as above,
LED lamps too low in load for control from normal or
LED dimmers.
Purpose, dummy/resistance loading but one not seen in light output on
stage or even back
stage. Attached, photos of an entire rack devoted to 48 channels of
incandescent loading per
dimmer channel. Last year built it, two shows used so far with it. That 30+ year old
road case the photos are on, are currently at R&R for total re-build of the case. Funny, they at R&R asked the same question about UL listing, this after explainging what it was and why it was needed, than the whole concept of what it does.
Prototype
stage... fans in use not powerful enough to properly cool the 6x60w internal box lamp assembly. Lots of details but project put aside for a few more weeks. Should work in concept, but I have a child bed to
build firs,t in it not working for tour potentially needing it next week, the R&D will take more time than I have available at the moment.