Saunders / LPL D6700 Dichroic - Power Supply? Fan?

[Todd Barlow]

I saved a Saunders / LPL D6700 Dichroic from the landfill.

Before I do any work on it, does anyone know if requires a separate power supply?
I could only find a C6700 Colour enlarger manual and it shows a separate power supply.

Also is there a fan buried inside the head?

Thanks

Todd

 

[cowanw]

I have a 670 dichroic and a 670 condenser. The later does not have a power supply but the dichroic one does, called the "Sunders/LPL Power Supply" a 4x6x8 black box. If you are ever in Hamilton and want to look, come by.

 

[voceumana]

Be very certain of your model number. Saunders sold two different 6x7 series--the 670 and the 6700. The answers are different between the two series.

The Saunders/LPL 6700 dichroic does not use a power supply--it operated directly on 120V. It does not have a fan in the head. The 670 is different, and uses a 12V transformer for a power supply, but, again, no fan.

The 6700 uses an 82V bulb, but the 670 uses a 12V bulb, thus the reason for having a power supply on one but not the other. There is a huge difference between the 6700 and the 670 for just a single "naught", and the 670 is the more advanced model. In the rest of the world, the Saunders/LPL 670 is known as the LPL 7700 Series.

The easiest way to tell the difference: the 6700 has the filter thumbwheel adjustments on the front of the head, the 670 has knobs on the side of the head.

 

[spijker]

The 670 is the equivalent of the 7700, not the 6700. I'd suggest to the OP to open up the lamphouse and see what kind of bulb or socket is in there. If it's a 2pin halogen bulb/socket it means a 12 V bulb that needs a power supply. I have the 670 vcce. I also have spare colour head that I don't use. Both use a 12V 100W mr16 halogen bulb. No fans.

 

[MattKing]

I'd suggest you talk to KHB: http://www.khbphotografix.com/LPL/LPL6700Series.htm

 

[AgX]

Ignorant on these models I assume that a head needing an extra supply has a non-household power connector.

(But I got a projector that needs a special supply and nevertheless got a household plug and thus can be put directly on the mains, thus ruining its special lamp...)

 

[John Koehrer]

82V & 12 Vbut only one doesn't need a PS. Is there a converter of some kind in the 12V one?

 

[voceumana]

I suspect the ones that used the 82V version had a built-in solid-state voltage limiter.

 

[Nate Kimmitt]

Hey Guys,
Complete newbie to photography and enlargers here. Trying to buy my gf a color enlarger for Christmas. I've found one on eBay:

https://www.ebay.com/itm/Saunders-L...793915?hash=item4695ca9b3b:g:JL0AAOSwUyBbQ9tL

My issue is, it's listed as a Saunders 670 Dichroic, but it looks more like a 6700 to me. One of the photos indicates the output is 82W, which is consistent with the 6700 described above.

If anyone has any advice that would be appreciated!

 

[MattKing]

Welcome to Photrio.
You have probably run into the confusion arising out of the fact that different geographic areas have different distributors for the Saunders/LPL products, and badge them differently.
KHB Photografix in Ontario Canada is both a great place to buy from and a great information resource - here is a link on their site that should help: http://www.khbphotografix.com/LPL/index.htm
To my mind, that eBay listing looks like the older Nikor enlargers.

 

[voceumana]

It is an earlier version; I'd recommend looking for a current version.

 

[Ian C]

There are two versions of the dichroic-filtered color head for the LPL 6 x 7 cm enlargers. I own one of each. In the photo shown from the eBay listing of Post #9, there is only a power cord present—no small cord that would connect to an external transformer power supply. This is almost certainly a version with the power supply built into the head.

The 12-volt version has a two-conductor cord from the head to the external power supply. The US/Canada model uses a 120-volt 60Hz to 12-volt transformer power supply.

The 82-volt model uses a small half-wave rectifier power supply built into the head. This lacks the cord to the external power supply of the 12-volt model.

In photos 5. 6, 7, 8, 9 in the following article you can see a typical half-wave rectifier power supply of this type in the Omega C700 dichroic head—one diode and one resistor, that’s all there is. Some half-wave rectifier power supplies include a smoothing capacitor as well.

http://www.blogintrigue.com/2008/11/omega-c700c760-power-supply/

Neither model is equipped with a cooling fan, just ventilation slots in the housing for convection cooing, and nether model has any built-in voltage regulation. For critical color work, you have to buy a constant-voltage line stabilizer to keep the voltage to the lamp constant within a small tolerance.

There is nothing wrong with the older model. The differences are cosmetic. The version shown in the photo in post #9 was also branded as Rollei and Nikor.

 

[voceumana]

I believe the older model uses different negative carriers--at least it appears that way in the photos I have seen of them.

 

[AgX]

For critical color work, you have to buy a constant-voltage line stabilizer to keep the voltage to the lamp constant within a small tolerance.

Only in case there actually are voltage fluctuations at the outlet you use.

(May it be from fluctuations at the line supplying your home or from within your home.The latter should only be short negativ peaks at switching on high current drain appliances, if at all.)