[TheForge] Gas heater question

[Andrew Vida]

Because we have gas wells and all the free gas we can burn, I am 
installing gas heaters in various locations in the house.  The 10' deep 
pit I dug under the house (was a 2' crawl prior) has two large openings 
to the outside air and the bedroom was cold last night.  I will install 
a heater temporarily and plug the holes as best I can for now, but I 
doubt that will suffice when it is 10* out.

My question is this: I have one more gas heater on hand - a wall unit I 
picked up at auction on the ultra-cheap - but it is jetted for propane.  
Can I re-jet for natural?  If so, can I just drill out the existing jets 
or does it behoove me to buy factory   made? Since this isn't a gas 
forge and I am not in the mood to burn down a second house, I want to be 
more certain of what I am doing.

Any help is greatly appreciated.

Thanks.

     -ND
On 10/22/13, 4:17 PM, Bob wrote:
>     I don't have a solution for the heating process but could tempil 
> sticks tell you when you have reached the desired temperature?
>
> Bob Willman
> The Eagle's Anvil
> Bowling Green, Ohio
> WB8NQW
>
> To the kindly influence of Christianity we owe that degree of civil
> freedom, and political and social happiness, which mankind now
> enjoys…Whenever the pillars of Christianity shall be overthrown,
> our present republican forms of government – and all blessings
> which flow from them – must fall with them.
>
> Jedediah Morse
>
> On 10/21/2013 6:24 PM, Bruce . wrote:
>> ​I am altering the eye shape of a few commercial needles.  They're too
>> brittle to work without normalizing, but onc​
>> ​e normalized, they bend just fine.
>>
>> Now I need them hard again.  Well, dunking in water while at a red heat
>> works for that -- but leaves them more brittle than ever.
>>
>> A tempering operation (to purple or blue, probably) is quite easy on a
>> chisel, but even SEEING the colors on a needle is a challenge. For one
>> thing, there's no good surface to polish.
>>
>> I've tried a couple methods, all without success -- my toaster over 
>> doesn't
>> get hot enough, like, maybe 450 F, despite what the dial says. (520 F =
>> purple, 540 F = blue, 590 F = peacock, according to one reference.)  I
>> tried heating an iron griddle to these temperatures and leaving the 
>> needle
>> on it for about 5 minutes -- no luck.
>>
>> I considered using a salt or solder bath, but find no appropriate 
>> salt and
>> that I'd need 80/20 to 85/15 lead/tin solder -- which is not readily
>> available -- to get a liquid bath of the right temperature.
>>
>> I'm considering a sand bath or a furnace, using a thermocouple to 
>> monitor
>> temperature, but as you can see, this is getting increasingly 
>> complicated
>> for what should be a rather simple task.
>>
>> Hence, I'm soliciting suggestions how to temper a needle.  Any notions?
>>
>> Bruce
>> NJ
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