Hello Kentsu,
if your lamp is burning (with flames) in the hood-area, it could depend on a loosen jet. This can appear, especially within the use of the heater, because of stronger expansion forces.
If there are yellow flames, coming from the ceramic-nozzle, using less pressure could be useful too, like only 1,5 BAR or only 1 BAR.
If your mixingtube is glowing red while being in use, then you have to change something in the settings of your lamp, otherwise some little flames can be normal while using the heater - but they should not exit trough the hood.
Another tric is to place some wound steelgause inside the heater, this spreads the entering flame more and results in more heatingpower. 
Good Luck, Björn
Hello Kentsu,
okay, so what you described, this should not be!
You are using the heater and the mantle? (normally, the heater is used without mantle. But for light, you can place a broken mantle inside the heater.)
Did you remove the glas before using the heater?
It sounds to me like a heat buildup.
Hmm we will get that to run...
Best regards, Björn
Oops... that sounds not good.
Did you try to use the radiator without glas?
This should work then hopefully.
Good luck, Björn
Hi Kenneth,
the stainless nozzle is a problem for itself, it indeen leads and keeps more heat up to the hood, and it expands more than its brass-chamber while being preheated. This can cause a widening of the brass-chamber and the nozzle with mantle can fall off.
This oftenly happens, as stainless steel and brass are two materials, who does not work well together. (Pelam will propably stop selling them, soon.)
From my opinion, it is better to use the ceramic nozzle, they work quite well since the date of first construction (1911)
To your needle, I would lower the needle down to 0.5mm or even less to be sure the needle is not halfway in your jet while being in downward position.
I never heard about using the heater with the glas in combination of a 500HK-lamp, only in combination with a Petromax 1500 heat-cook-light-combination.
It makes not that much sense using the heater with glass, as most heat is going up through the hood instead of being radiant heat around the lamp.
I would use the heater without glass but with the side-reflector.
On cool evenings in the garden or on the veranda, heating-machines do have a very high womanizing factor 
Good luck, Björn
No problem, you`re welcome.
Pelam took over this stainless nozzle and pseudo-datas from the US-concern "Brytelit" who also sells petromax-lamps and developed this crap, also the so called "multifuel-stove"
It is physically not possilbe to increase the light-output up to 10% or more by only changing a material - pelam should have approved this... 
It is misleading customers.
The ceramic nozzle works fine, i never had to change one and i do possess about 20 lamps, being produced between 1925 and 2004.
They only do not like becoming wet and being preheated then....
Best regards and always good light, Björn
Hello Kenneth,
thank you for approving my theory.
I will refer to your post if other people would ask for the stainless-nozzle and a higher light-output.
Always good light (and heating), Björn
