soldered or just crimped

I haven't been on the forum in a long time. But these days, in my 'old age', am sprnding more time with my little collection. Could someone enlight me about the following?

Coleman 411 copper tank ends seem 'crimped and soldered' while the newer red tanks seem only 'crimped'. Is this correct?
Have modded my '431 easy-light' to be able to use kerosene. Yes, needs more pressure in tank and better heat retention on generator. QUESTION: Is the cast venturi of the 411 better than the stamped venturi of the 431 for this? Is the 411's heavier connecting tube [between burners] better than 431's tube for this?

BTW, I've added a short shrader-valve into a spare tank cap to use a bike tire pump for faster/easier pressurising.

Ever since the 1998 "Ice Storm", I've been very interested in multi-fuel stoves - bought my Primus Himalaya MFS right after that 'storm'. And a propane adaptor for the 431.

Thanks for any help on these, Gideon

 

hello there! (left to look into mirror)

 

Coleman’s steel fuel tanks are brazed with copper. The crimps hold the joint tight as the tank passes through the brazing furnace.

Hopefully this link works.

 

Thanks for that!


-R

 

Where are you located, so perhaps we'll look in the mirror together?
Myself, I'm in Hawkesbury, Ontario, Canada.

 

Thank you. Was just curious as the old tank had clear marks of soldering.