Search results

How about a chunk of the 3.945 profile? I haven't assembled my kit yet but a 92x25 or 92x38mm fan mates perfectly.

I need to add pearlite to my brand new hempys, Canna over original Hydroton. I've been doing pure bagged coco in one gallon fabric pots fed by Tropf Blumat (but I can't get rid of white mold in the system). The hempy plants would truly be drowning if I watered to slight overflow at the drilled...

I was going to epoxy a thermocouple to a CXB3590 but there is no way with the Ideal holder, I don't think. I bought a common K-type only temperature meter and extra thermocouples. Then I read the Cree manual in more detail and they recommend T-type for the CX series but K-type for the XL--I...

I don't like my Lumigrow Pro 320 enough to research it, sorry. Lumigrow is "OK" but I'm working on DIY COB luminaires.

Hmmm . . . maybe I'll run three 72V COBs on my bar @ 700mA instead of two @ 1050mA. I just received some 3.500 wide heatsinkUSA bars and I checked both types with feeler gages and a machinist parallel. I'm seeing 0.009 inch dish in the 3.500 extrusion and 0.0105 for the 3.945.

Yeah, I think so. I have six gallon Essick Air models in my veg and flower rooms, very useful for improved VPD but the cooling ability is minimal. My outside air exchange is much drier than I expected, being near Seattle.

I ordered a proper set of Nicholson 12 inch flat files: (double cut) bastard, second cut, and smooth. I've been struggling with a 10" smooth that constantly clogs and 60 grit emery cloth from China that immediately wears out. A mirror finish has never been my goal for a heatsink. I've bought...

My design is a pair of 3000K driven at 75W each, under 100mm diameter glass lenses. (I think somebody here said lenses shouldn't be used at over 75W?) The flatness of the heatsink is commercially acceptable, I guess, but I'm coming from a PC modding background. :) Edit: I plan to epoxy K type...

The flatness of the 3.950in HeatsinkUSA product was disappointing. I'm not surprised, given the depth of the fins but a fan will not lie flat on top and the bottom surface is cupped at least 0.01inch. I've spent way too much time draw filing and sanding--should have requested a machining...

"The roundtable participants discussed three key topics. First, they addressed how to establish universal metrics for plant responses for radiations. Since such metrics don't exist, in many cases LED lighting fixtures used for horticulture applications are "qualified" for energy savings per...

Positivity, your UV source is still T5HO?

Thanks for the onlinemetals.com site--they have some good info there. Years ago, I'd get my project aluminum from the Boeing surplus store in Kent, WA.

Thanks, you saved me asking if I can solder a Fieldpiece ATB1 Bead Tip K-type thermocouple to a CXB3590. I have a good thermal epoxy.

A picture of my plan: wrecked my back fixing the house to work on this but oh well.

Got myself some Wagos, they worked great connecting dissimilar wires for an overhead fluorescent repair. I don't know if I'll use them on my bar but I do wish they made a version with screw eyes for mounting.

Rolled pan with louvers and candy apple paint.

I've only used pool shock for a week but I've been using bleach in my Blumat drip system for more than a year, fighting oxygen loving white mold. I run ten and twenty gallon reservoirs with MaxiGro or MaxiBloom and Drip Clean. The chlorine is added last, after the pH has been checked with...

Did you use a fine tooth saw blade?

Veritas® Optical Center Punch To keep a twist drill from skating on metal (and leaving you with a hole in the wrong place) you should always use a center punch, especially when using small flexible bits. The dimple created by the punch holds the bit point true. The Veritas optical center punch...

Yesterday, I made up my first batch of calcium hypochlorite solution for use in reservoirs that feed Tropf Blumat drippers. Using one gram of 47.6% HTC brand and 80ml distilled water gives me twice the concentration of the 24g per gallon recipe. My problem is, the calcium hypochlorite does not...