I have an old 3M 66AG OHP that my father-in-law managed to procure for me. And with my QA-1650 panel, and a Beseler projection lens and the first surface mirror from the 66AG, I'm getting an amazingly good 100"+ picture (screen door issues and all). Even pretty bright... but I've had to mess with the brightness on the panel and that washes out my color... So now I'm looking for a better way to light the LCD with my OHP until I can get a custom enclosure built with a MH bulb. So here's my question.
If I bought a ENX/FXL socket and retrofit it into the 66AG, what kind of issues am I going to run across? I've seen schematics for OHP's... If you even want to call it a schematic... There was one bridge rectifier and one resistor and that was it... I've also found a place where I can get a nice sized stash of ENX bulbs for super cheap (~ $1 each) So would it be worth it for me to put a different socket into my OHP? Am I going to run into any kind of safety issues doing something like that?
If I bought a ENX/FXL socket and retrofit it into the 66AG, what kind of issues am I going to run across? I've seen schematics for OHP's... If you even want to call it a schematic... There was one bridge rectifier and one resistor and that was it... I've also found a place where I can get a nice sized stash of ENX bulbs for super cheap (~ $1 each) So would it be worth it for me to put a different socket into my OHP? Am I going to run into any kind of safety issues doing something like that?
since no one seems to want to reply, I'll fill everyone else in with what I've found.
I've looked up the schematics to a couple of different OHP's. Some that use DYS and some that use ENX. Here's what I've found.
For the most part, the circuit in OHP's is extremely simple... Kinda why I was hoping I could find a quick answer here. But with the DYS bulb, the circuit contains a power cord, a power switch, a fan and a bulb. That's it.
With the ENX, I found a schematic that shows a power cord, power switch, Bulb, a thermal fuse (values?) and a thing called a 110-2450 bulb protection unit that seems to consist of a couple 6A diodes, and a 5A fuse (FB? SB? Anyone?)
So, I think that there's no reason why I can't try running an ENX bulb out of my DYS OHP. Heat may be an issue, but if I run it for a short time just as a test, or without my LCD panel to eliminate risk of hurting it, I think I'll be able to quickly tell if it will work or not.
I know it seems like a lot of trouble to go through just to retrofit an ENX bulb into a DYS OHP, but I have found a good supply of ENX bulbs for super cheap... I'll be able to get a dozen ENX bulbs cheaper than I could buy 2 DYS bulbs.
So now, I'll ask another quetion. What about the possibility of putting a variable resistor in the circuit with the ENX bulb? So that if I feel it is too bright for some scenes, or applications, I can dial it down a little bit. Any Electrical engineers out there with any ideas on a good value to use?
I've looked up the schematics to a couple of different OHP's. Some that use DYS and some that use ENX. Here's what I've found.
For the most part, the circuit in OHP's is extremely simple... Kinda why I was hoping I could find a quick answer here. But with the DYS bulb, the circuit contains a power cord, a power switch, a fan and a bulb. That's it.
With the ENX, I found a schematic that shows a power cord, power switch, Bulb, a thermal fuse (values?) and a thing called a 110-2450 bulb protection unit that seems to consist of a couple 6A diodes, and a 5A fuse (FB? SB? Anyone?)
So, I think that there's no reason why I can't try running an ENX bulb out of my DYS OHP. Heat may be an issue, but if I run it for a short time just as a test, or without my LCD panel to eliminate risk of hurting it, I think I'll be able to quickly tell if it will work or not.
I know it seems like a lot of trouble to go through just to retrofit an ENX bulb into a DYS OHP, but I have found a good supply of ENX bulbs for super cheap... I'll be able to get a dozen ENX bulbs cheaper than I could buy 2 DYS bulbs.
So now, I'll ask another quetion. What about the possibility of putting a variable resistor in the circuit with the ENX bulb? So that if I feel it is too bright for some scenes, or applications, I can dial it down a little bit. Any Electrical engineers out there with any ideas on a good value to use?
More info about what I'm trying to do....
I emailed topbulb to see if they could be of any help since they sell an ENX socket. The only response I got back was that it wasn't possible because the two bulbs used a different socket (which I already knew) and that the DYS was 120V but the ENX was 82V (again, something I already knew... That was as much help as I got.
So, I'm posting some links to schematics to see if anyone here has any thoughts.
First off, here are some schematics for 66 series 3M OHP's... I have a 66AG.
http://www.kmr.com/manuals/3m/66/3M66_P25.htm
Second, are schematics for a dukane with an ENX bulb
http://www.kmr.com/manuals/dukane/641A/641a_06.htm
Now, I don't see much difference in these two... So if the ENX requires a power supply of only 82V, what in the dukane is stepping it down? Anyone with any ideas?
I'm not looking for a definitive answer, just looking for some help from someon who understand the theory behind what I'm doing that can say that this shouldn't burn my house down.
Thanks
I emailed topbulb to see if they could be of any help since they sell an ENX socket. The only response I got back was that it wasn't possible because the two bulbs used a different socket (which I already knew) and that the DYS was 120V but the ENX was 82V (again, something I already knew... That was as much help as I got.
So, I'm posting some links to schematics to see if anyone here has any thoughts.
First off, here are some schematics for 66 series 3M OHP's... I have a 66AG.
http://www.kmr.com/manuals/3m/66/3M66_P25.htm
Second, are schematics for a dukane with an ENX bulb
http://www.kmr.com/manuals/dukane/641A/641a_06.htm
Now, I don't see much difference in these two... So if the ENX requires a power supply of only 82V, what in the dukane is stepping it down? Anyone with any ideas?
I'm not looking for a definitive answer, just looking for some help from someon who understand the theory behind what I'm doing that can say that this shouldn't burn my house down.
Thanks
Why in heaven's name are you trying to retrofit a Halogen setup to another Halogen setup????
You know that such a retrofit is as much or even more work than going to a MH setup don't you?
Halogen bulbs get their voltage from a transformer, you will have to get one for a 80V bulb.
You'll end up with a very heavy, hot, yellow/orange picture producing setup. And you will have to change the bulb very often.
Why not go for MH??
The only parts you need are a transformer(=ballast), ignitor and a bulb with socket (only for a double ended bulb, single ended sockets are easy to diy). Less heat/weight and MUCH better picture.
You know that such a retrofit is as much or even more work than going to a MH setup don't you?
Halogen bulbs get their voltage from a transformer, you will have to get one for a 80V bulb.
You'll end up with a very heavy, hot, yellow/orange picture producing setup. And you will have to change the bulb very often.
Why not go for MH??
The only parts you need are a transformer(=ballast), ignitor and a bulb with socket (only for a double ended bulb, single ended sockets are easy to diy). Less heat/weight and MUCH better picture.
Currently, I'm using a DYS bulb that's got who-knows-how-many hours on it. I've come across about 12-15 ENX bulbs that I can get for dirt cheap, almost free.
If I retrofit to an ENX bulb, I get a cheap supply of bulbs, I spend $5 on a new socket, I get a brighter light, I get a light with a built in reflector, I get better power efficiency, and I can do it for a lot cheaper than I can put in a MH. We're talking about an OHP here. It's super fast, it's super cheap, and it has benefits. That's why I want to do it. It wouldn't take more than an hour to put the ENX in, decide if I like it, and put the DYS back if I don't. There's just not enough reason not to give it a try. When I get my custom enclosure done, then I'll use a MH bulb.
Now, as for a transformer for the 82V bulb... Is this the case? Can someone with an OHP using an ENX bulb tell me if there is a transformer in the OHP? Where is the power getting stepped down to 82V from the 110V at the wall? It certainly isn't in the schematic of the dukane that uses an ENX that I found. That is still my biggest question...
If I retrofit to an ENX bulb, I get a cheap supply of bulbs, I spend $5 on a new socket, I get a brighter light, I get a light with a built in reflector, I get better power efficiency, and I can do it for a lot cheaper than I can put in a MH. We're talking about an OHP here. It's super fast, it's super cheap, and it has benefits. That's why I want to do it. It wouldn't take more than an hour to put the ENX in, decide if I like it, and put the DYS back if I don't. There's just not enough reason not to give it a try. When I get my custom enclosure done, then I'll use a MH bulb.
Now, as for a transformer for the 82V bulb... Is this the case? Can someone with an OHP using an ENX bulb tell me if there is a transformer in the OHP? Where is the power getting stepped down to 82V from the 110V at the wall? It certainly isn't in the schematic of the dukane that uses an ENX that I found. That is still my biggest question...
hey, ok heres some specs on DYS its 17,000 Lumens 3200K and 75 hours remember we talked about this...🙂 using ENX will make it LESS bright ENX is 360w around 12000 lumens (if my memory is right) and FXL is 14-16,000 Lumens 3400K 75 hours ENX are mostly rated 2,000-3,000 OHP Lumens and RARELY 4,000 on special optics OHPs FXLs are 4,000-6,000 OHP Lumens.
i doubt your ENX will even compare to the DYS in your setup , your 66ag is an ancient OHP which relies on the DYS pure power to be bright, it has no special optics system kinda liek my AI-1000 ENX OHP are usually professional placed with their OHP optics system. 12-15 ENXs do not compare to one 34$ HQI bulb
good luck buddy 🙂 proceed with...
i doubt your ENX will even compare to the DYS in your setup , your 66ag is an ancient OHP which relies on the DYS pure power to be bright, it has no special optics system kinda liek my AI-1000 ENX OHP are usually professional placed with their OHP optics system. 12-15 ENXs do not compare to one 34$ HQI bulb
good luck buddy 🙂 proceed with...
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