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FarmerPalmersNT

Horizontal twin cmh reflector

31 posts in this topic

@Joint hogger Is that the 80cm Parabolic, if so i might give it a go. :yep:

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Posted (edited)

The lights just come on in the groom and it all looks fine, the light spread is fine and the fan is blowing across the two lamps so I`m confident it will be ok.

 

large.5b1413609765f_canopy1.jpglarge.5b141362bb494_canopy2.jpg

Edited by ratdog
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1 hour ago, Joint hogger said:

@Amnesia

large.5ae90b53619b0_Twin315wMaxibrightParaboic(5).jpg     

 

^ This is what I had planned to build, someone in another thread said it couldn't be done. lol  That looks superb, I  might space my bulbs slightly more apart though. :)  

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55 minutes ago, Amnesia said:

@Joint hogger Is that the 80cm Parabolic, if so i might give it a go. :yep:

 

 

yes mate its the 80cm sunking with 2 PGZX18 CMH lamp holders, I done away with the old E40 assembly to reduce headroom but decided to keep it just in case I ever use HPS or MH again, 

the lamp holders cost about £20 each & about another £25 for the 2 aluminum boxes + bolts/nuts + connector block + 2 cable glands, for the iec cables, I just got 1 5m iec extension cable &

chopped it in half (2.5m), I left the iec male on one length & got a wire-able iec male adapter for the other length of cable & wired both ends into connector block inside the aluminum boxes,

 

it was easy to drill as the sunking para is made of light steel but it was a major pita lining up the holes for drilling, probably would have helped if I was straight at the time  lol

 

gallery_36349_2174_127577.jpg         gallery_36349_2174_51471.jpg                 

 

 

 gallery_36349_2174_83050.jpg  gallery_36349_2174_102055.jpg

 

 

gallery_36349_2174_130402.jpg       gallery_36349_2174_174979.jpg      

 

 

gallery_36349_2174_160593.jpg            gallery_36349_2174_115311.jpg             

 

 

gallery_36349_2174_169250.jpg                    gallery_36349_2174_19842.jpg             

 

 

gallery_36349_2174_37956.jpg          gallery_36349_2174_125606.jpg

 

large.5ae90b27387b9_Twin315wMaxibrightParaboic(1).jpg

 

    

here's the finished article, because of its weight & hassle of trying to keep it level, I used 4 yoyo's, 4 wire rope u bolt clamps & cable ties, you can get a pack of 6 clamps for £3 from ebay/amazon.

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41 minutes ago, Saddam said:

 

^ This is what I had planned to build, someone in another thread said it couldn't be done. lol  That looks superb, I  might space my bulbs slightly more apart though. :)  

 

 

thanks very much mate  :yep: 

 

if I get round to building another, I'd maybe use slightly smaller aluminum boxes & have mounted them length ways instead, this would have given me a slightly bigger gap between the lamps.

 

also, forgot to mention in my above post is that your better drilling bigger holes on the top plate for the cables to pass through, this is to prevent the cables from getting sliced or damaged

by any sharp edges, think I used a 6mm or 7mm bit.

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31 minutes ago, Joint hogger said:

this is to prevent the cables from getting sliced or damaged by any sharp edges

 

Thanks for showing us your build. :notworthy:  Top notch. :) How hot does it get up there? Would grommets melt if you put them inside the cable holes? 

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If anyone's interested in doing a build themselves, the best PGZX18 lamp holder I've found to date is made by Colosio which is a spanish company,

the one's I used is the - PGZX18 - A93X. you can get them wired or unwired but its worth the extra few £ for a pre wired one.

 

pgzx18--a93x.jpgpgzx18--a93x.jpg

 

 

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Posted (edited)

14 minutes ago, Saddam said:

 

How hot does it get up there? Would grommets melt if you put them inside the cable holes? 

 

nearly as hot as a 600w Hps, thats also another reason I ditched the original lamp holder & bracket, the fly leads on the lamp holders

are rated to 250c but for piece of mind, you can get small lenghts of heat proof sheafing for a few quid.

 

Edited by Joint hogger
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Awesome work there @Joint hogger. Will update when mine is fitted. Won't be for a while as im finishing this one with one cmh.

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Ooops, just rereading through one of my earlier posts I noticed I made an error, I originally said I'd used a Male IEC connector to connect to the ballasts but it was a Female IEC connector,

just pointing it out in case any one does their own build & end up cursing me when the two plugs are males & so are the ballasts  lol

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Posted (edited)

here's a couple more pics I took when putting my diy CMH lamp hangers together before I put them onto the parabolic, the White wire is the Live & the Blue wire is the Neutral.

also, the pic with the red circle is to highlight the way a CMH lamp clips in to the lamp holder.

 

gallery_36349_3573_22012.jpg    gallery_36349_3573_129374.jpg

 

for attaching the lamp holder to the aluminum box, I used 20mm M5 bolts with locking M5 nuts.

 

gallery_36349_3573_125837.jpg          gallery_36349_3573_202319.jpg

 

if you look at the second pic, I used the male iec initially before I quickly realized my fuck up  lol  I also used 20mm cable glands, 16mm cable glands are a bit tight when using 1.5mm three core cable.

 

gallery_36349_2174_209568.jpg              gallery_36349_2174_208119.jpg

 

 

gallery_36349_2174_146929.jpg              gallery_36349_2174_48934.jpg

 

gallery_36349_2174_41764.jpg       gallery_36349_2174_340062.jpg  

 

gallery_36349_2174_9040.jpg         gallery_36349_2174_56661.jpg

 

if you look at the wiring pic, you'll notice that I connected the Earth to one of the bolts holding the aluminum box to the parabolic with a crimp ring.

 

      gallery_36349_2174_31841.jpg     gallery_36349_2174_170718.jpg

 

 

 

Edited by Joint hogger
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Here's a piccy of the cheap twin CMH I picked up. £39.99 on evilbay:

 

large.20180608_093734-1612x907.jpg

 

Its pretty basic, but will do the job. A twin LEC would be nicer, but think that will have to wait. I counted up my unused reflectors today and I have 12!!! Also a huge box of ballasts and HPS/MH bulbs... I really need to get rid of some. Looks like I'm planning a warehouse grow!

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2 minutes ago, FarmerPalmersNT said:

I counted up my unused reflectors today and I have 12!!!

 

 

lol I`m getting close to that too now mate.

 

Can you slip a couple of bulbs in and measure the distance between the ends of the glass please?

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Will do - won't be till later mind, I'm not at home at the minute.

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Sorry - forgot about this @ratdog - there's 8cm between the ends.

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