I have now dismantled the entire lamp and I am wondering about this part. How am I supposed to adjust this tube or dismantle it? Dont think I am supposed to being able to adjust it, but it is still a bit odd that the entire thing is just wielded on.
Your 930 is exactly how it is supposed to be. This was the first variation of the 930 which was supposedly rated at 350cp. This variation was made between 1954 and 1957. Around the 1957/58 period there were quite a few lanterns produced with mixtures of parts from the old and new variations. Anyway, back to yours. The first 930's used a mixing tube from the 200 so that the gap to the jet could be adjusted. Burner dimmensions are as on the 200, so I could never understand their reasoning for calling it a 350cp lamp. You can fit a 350cp jet and mantle with good results, but I prefer a 250cp jet. The first variation had the top part fixed to the globe cage as yours is. Btw, the air gap should be about 13mm.
Is there a difference between the jets? I am about to order a jet from Base Camp, 2670 jet for lantern 930. But I am not sure what CP this jet is. Where might I get a jet for 350CP?
I am guessing that since the jet also fits Otpimus 200 and 1200 then it might be a 350CP after all. I have read some place that it might work to use a Petromax jet on the Optimus, is this right?
2670 is listed as being for the 1200 and the 930. They don't give a cp rating though. My guess is that it is a 250cp jet. The jet for the 1350 lantern, which is a 350cp lantern, is a 2671. All jets for Optimus lanterns (and most Petromax and clones) have the same physical size and thread. It is only the hole size that differs.
Got an answer from Base Camp where they say that the Original jet is 250CP and it produces 350CP when fitted to the lantern. If one should fit a 350CP jet, then the same problem with black mantle might occur again.
Hi, don't want to start new thread, so I try to ask here. My Optimus 930 is missing mixing chamber and nozzle - can you help me with finding new one? thanks,
By mixing chamber I guess you mean mixing tube? This can be bought on Base Camp with part nr: 2721 Mixing tube 930 lantern, £9.65 Nozzle can also be bought on Base Camp with part nr: 2710 China nozzle for late 930, 1200 £14.95 Dont know what they mean by late 930, perhaps it is best to ask them if there is a difference between the models. Edit- Oh wait, by mixing chamber you might mean gas chamber which is missing on your picture. 2715 Gas chamber, lanterns 200, 930, 1200, £ 9.65 I am not quite sure if my 930 model has the gas chamber, must take a look when I get home. Here is an exploded view of the 930 http://www.base-camp.co.uk/Optimus/930.htm
Thanks Kristian, I know base-camp, but I don't like their way to do orders via fax and credit card - just prefer normal online shops. I also wonder is it possible to use some other brand parts - maybe something from petromax 250 will fit? Your lamp have to have gas chamber if you want to light it
Wim, thats why I wonder are gas chamber and nozzle fits from Petromax - Pelam and Stugga don't sell Optimus parts.
Great But I have next problem How I can unscrew pump valve from this lamp? I think I can make some tool from pice of pipe, but don't know dimensions
Have a look here http://www.classicpressurelamps.com/forum/showtopic.php?fid/6/tid/3256/ Easy enough tool to make. ::Neil::
Cant let this thread die! Now I am wondering why my 930 dont have a gas chamber. The nozzle screws on to the mixing tube as if it is supposed to fit, perhaps the threads are the same on the chamber and tube. Have anybody ever heard of a 930 that dont have the gas chamber? I know that this is a bit earlier model for 350CP instead of 300CP, so might happen it is so. Edit- I have tried to light the lamp without the gas chamber, and it seemed to work fine until the black mantle happened which I do believe is due to soot and stuff in the vapourizer and a too big jet.
It is actually two pieces. The ceramic mantle holder/flame spreader screws into the brass gas chamber, but it is not uncommon that they get stuck. As the flame spreader is ceramic it is not a good idea to force it. If it is stuck, then it most likely wont leak.
Thanks for the pictures! Wonder why they have separated them, cant seem to see the difference. Perhaps the old nozzle is different from Pertromax and such. Am not quite sure but I think that my primus 1082 has a separated chamber and nozzle.
Hello, My 930 has a Petromax 250 nozzle in it, the threads are a bit long so it doesn't seat all the way down; but it doesn't leak.
I can confirm, that nozzle and gas chamber from petromax 250 works like a charm! Edit: After two hours of work I can say that this lamp gets really hot! It is good to have this glass handle on it. And it is quite loud. But it gives really nice light
You will find that almost all the Petromax style burners have a ceramic flame spreader which is seperate from the gas chamber. The one you show in your picture is two pieces, just stuck together with age and use. I have also seen them glued together with muffler putty. Yes the 930 get quite hot. It should still be possible to hold onto the lower paret of the tank so you can pump it though.
Just love it when the parts from different brands fits on each other. If I am lucky, I might be able to buy parts from Base Camp. I am almost done making an order by mail, but it takes a looooong time to get an answer .
