Andes Combination Range: NG to LPG

Hi, I am new to this forum. I have a "new" Andes combination range that I need help with. There are multiple questions, but first: The orifices are set for natural gas, I want to convert to propane. What is the best way to do this? I was thinking that a dab of epoxy over the large orifice (on one valve), then start tiny and drill it out bigger incrementally to the correct flame size (just touching the cooking pan bottom). Is there a chart to do this conversion, or is it trial and error until the flame is the right height at the burners? Is there a rule-of-thumb to save me some foolin' around? Then I'll make up some brass disks with the correct hole and insert into each of the nozzles for the final “conversion” – make sense? Once I figure out how to add pics, I will do it...

btw - pic help would be appreciated...

Only help I can offer is to apply molten solder to flood brass orifice(s) before drilling smaller for LP size orifice(s)...solder may then remain.

Happen to have the oriface conversion tables?

what do they look like?

The regulator needs to be changed as well I believe. If you knew the size of the burners (BTU) then I could maybe find the proper orifice size.

How do I determine the BTU rating? A uncle who was on the biz back then suggested it was 12000 to 15000 BTU.

I am not sure 100% positive but I’m pretty sure those burners can use coal gas, propane and natural, there should be a brass piece that screws on to the valve that is changed like this and some are not even changed you just screw them on more

Also with lp the regulator is on the tank outside so your gas line inside will already be the proper pressure, hook it and try it, worst case the flame will be big and lazy with yellow in it or super short but blue. There is some adjustment is the air settings on those burners too, but keep in mind lp company’s hate those old match light stoves, I was a gas tech so I hook up my own stuff however I’ve heard of people not being able to get the gas company to make the final connection

DL, range is for hunting camp, so I'm my own tech. I use 100 lb bottles with a regulator at the battle. Ironically I got the old instruction card with this unit. It says I can turn the brass orifice to accommodate the pressure I need. BUT, when I unscrewed the end cap with the orifice, there was no needle to construct the flow. Looked like that feature was broken off intentionally at some point.

I looked at 2 other orifices and same thing...depression set in. (Although I still have 6 others to check, or not) So, I am back to closing my existing orifices to work. Current NG hole is .070, so have to go a lot smaller. But how small?

Does anyone know if I can find those inside pieces with the needle?

Does anyone know if I can find those inside pieces with the needle?

See my sketch of what I think the part should look like and what's missing...maybe. ideas are encouraged

When I needed to convert my stove, I brought the old orifices (keeping track of which one was used for each differently sized burner) to the local propane dealer and he sold me the LP equivalents for around $5 each. I wouldn't mess with trying to downsize the existing orifices.