An upgrade to an old favorite, Crelant 7G5 SBT-90.2

14 posts / 0 new
Last post
DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas
An upgrade to an old favorite, Crelant 7G5 SBT-90.2

Ok, so for the Crelant 7G5 SBT-90.2 build I got the new driver built and the fix for Bistro on it, rebuilt the light and am very pleased with the results…

A big part of the choice for using this light was the tail end, as it holds a heavy duty Tofty switch. These were built in England some years back and were $25 apiece! Worth it though when you need a quality switch that carries serious power, as this light now does… A Samsung 25S cell gives 23.2A at the tail for 4240 lumens out the front. Lux is 352.5Kcd for 1187.43M throw. I Like It! Big Smile

I built a light engine/heat sink to replace the emitter shelf area and I made it about an inch longer than there was room for, bored the end of the battery tube to accept this extra length and tie the heat sinking into the battery tube. Wink

I needed a spacer as the tube is still longer than an 18650, so I used a .458 Ham’r brass soldered onto a switch board, the board keeps the spacer centered and the heavy BlueSword spring contacts the brass screw in the Tofty switch. Big Smile

In the Crelant 7G5 the reflector has a 53mm opening and is approximately 55mm deep, this yields an excellent hot spot that is fat and well defined, the beam profile is a tube/column of light much like a very fat laser. Will get beam shots later tonight…

What with multiple interruptions it was somewhat of a hassle to build, but well worth it in the end! A great update to a nice old light, very happy with it’s performance… I just need to find some more Samsung 25S cells now. lol

1-15-20, beamshots (super high humidity then dense fog)

Edit: It’s 610 yds to the little white barn in the one shot, 195 yds to the tree in the other. Wink

Edited by: DB Custom on 01/15/2020 - 10:10
MRsDNF
MRsDNF's picture
Offline
Last seen: 3 days 2 hours ago
Joined: 12/22/2011 - 21:18
Posts: 13141
Location: A light beam away from the missus in the land of Aus.

Nice work Dale. Good luck on your search. Thumbs Up
Where are your sourcing your leds?

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

I got the 90.2’s from Wendy at Lantend.

Just ordered 6 Samsung 25S 18650’s from IMRbatteries for $3.99 each. Most power from an 18650 I’ve found.

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

Neal has had some of the 90.2’s at a good price but I don’t know if he has any left. Worth a look at NealsDeals

The_Fat_Controller
The_Fat_Controller's picture
Offline
Last seen: 21 hours 20 min ago
Joined: 09/13/2019 - 07:34
Posts: 318
Location: England

you need to find an aspheric for that old classic, i don’t know if it is the same as the 7g5cs , but if it is the 7g5ch collimator head may fit the thread on the neck section certainly looks hopeful Wink

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

Yes but… I much prefer a reflectored light to an aspheric.

MRsDNF
MRsDNF's picture
Offline
Last seen: 3 days 2 hours ago
Joined: 12/22/2011 - 21:18
Posts: 13141
Location: A light beam away from the missus in the land of Aus.
Beer

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

EasyB
Offline
Last seen: 1 hour 4 min ago
Joined: 03/09/2016 - 15:24
Posts: 1797
Location: Ohio

Nice, it looks like you added some needed mass and heat sinking with your custom pill. I think this is a great size light for this LED, prob a similar beam to my L2 with this LED. Good size to light up a large area a couple hundred meters out. I got 280kcd in the L2 at about 22A.

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

Several not-ideal beamshots added to the OP.

It’s intense, for sure! lol

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

Thinking of making a custom head via the bezel threads to enable a large reflector to fit on a Q8, thus utilizing 4 parallel cells in the soup can style light while also optimizing it with a larger reflector for this emitter. Big Smile

The_Fat_Controller
The_Fat_Controller's picture
Offline
Last seen: 21 hours 20 min ago
Joined: 09/13/2019 - 07:34
Posts: 318
Location: England
DB Custom wrote:
Yes but… I much prefer a reflectored light to an aspheric.

I couldnt decide….. so i ended up with both Facepalm

NICE BEAM SHOTS!! that looks impressive , how wells it coping with the heat?

johny723
Offline
Last seen: 2 hours 51 min ago
Joined: 06/08/2014 - 08:48
Posts: 390
Location: slovakia

I don’t have the privilege to hold it in person, but based on the power consumption of the emitter, it should be like taking a hot potato out from the embers Big Smile

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

I rebuilt my seventh scratch built light today, marrying my previous adapter and pill to a Q8. The big Luminus die does not disappoint in a 124mm reflector! Big Smile

DB Custom
DB Custom's picture
Offline
Last seen: 4 hours 4 min ago
Joined: 01/13/2013 - 22:28
Posts: 20561
Location: Heart of Texas

I set the thermal configuration in Bistro on the Crelant last night and it made 55 seconds before I cut it off, figured to stop it a little shy of too hot in order to allow some lee-way. Wink

The new one today uses Anduril and has far more heat sink mass… have yet to set thermal configuration or get beam shots as dark has yet to arrive. A too short 5M test shows 1.71Mcd though so it should be interesting getting a beam shot… hope weather is accommodating.