I had my reservations, but was curious. So I got this adapter that turns a regular 1 lb propane cylinder into a Lindal fitting of the kind for butane or butane / propane mix camp gas stoves.
This isn’t exactly the one I bought, but the same thing in design and function. (I got a cheaper one)
So it screws onto the propane tank and does not leak, as advertised. The stove attaches and gas comes out, as advertised. The stove even lights and runs, sort of.
As I’d thought might happen, the gas mix is just a bit too lean. At low flow rates it would be workable, but as the flow rate goes up, the flame separates from the burner head and floats higher and higher away from where it ought to be.
In an emergency it would be OK, I guess. A little bit of aluminum foil made into a strip and used to partly occlude the air input ports ought to make it work as usual with a proper mix.
So I’m not happy with it as it really is selling something that is highly unlikely to ever work well with any appliance that uses mixed gas and air. On the other hand, I’m not unhappy with it as it does just what I expected and does it as you would expect it to. I’ll get my $6 (for the cheapo one) of value out of it by playing with stove air mix holes just as entertainment value. Just don’t expect it to let you run the butane camp stoves on a cheaper fuel source.
There is a little butane ‘candle’ lantern like device for the Lindal valves. Basically a direct very small gas port, surrounded by a glass cylinder, with air flow. Since the gas doesn’t have a mixing stage, it just burns like a candle. I’d been thinking of getting one, but using that expensive butane fuel canister for a “Tech Candle” isn’t all that appealing. (They advertise them to campers as a way to use up the dregs in the canister when it gets too low to drive a stove at full power). Well, using one on the Propane would be Just Fine. So I’ll likely get one at some point.
When in college, in the ’70s, during the hippy movement; there was a fad of all the “earth first” types to have all sorts of candles in their room. In the dorms, they would put various pillar candles and such in the window, and walking down the hall you could see them if the door was open. Well, I took my propane torch, removed the burner head and the jet, and then just opened the valve a crack and lit the gas. Made a dandy “candle”. In a tech / Engineering kind of way. Well, I’d set that up on the window ledge and leave my door open. Folks (in tie-die shirts, long hair, smelling of ‘herbs’…) walking down the hall could be heard commenting on different candles. “Oh, natural bees wax!” “Oh, hand made!” “Oh, look at the colors!” then my door “Oh, look at the… what the… MURF!…” and I’d grin 8-)
So I could just get my torch out of the tool box and use it… ( Still have that valve body / stem…) But now I’m a bit more safety conscious and having a glass globe around it would be a feature. Run as a candle, I expect a can of propane would last on the order of a month… of full time use…
So there you have it. Works exactly as you would expect and does what they say it will do; but not very useful.