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RE: [APD] Yet another ? about DIY heating cables
> Subject: [APD] Yet another ? about DIY heating cables
> If you ignore the change in resistance due to temperature, you still have
> problem of finding wire that has the correct resistance. I REALLY don't
> comfortable putting 30awg wire in a tank full of water... it seems to me
> very thin and fragile.
Well is it really worth it then? Are there significant gains?
> So two questions...
> Does anyone know how much of an impact the change in resistance with
> temperature makes?
Not sure, but it's not significant, cables themselves have questionable
significance. Some swear by them, I've used them for a long time. I have
not used them for a few years now nor would in the future.
> Does anyone (especially those who have made heating cables themselves)
> good wire to use that will give me about 3 ohms total and is safe to be
> submersed in water?
I ended up wrapping the wires I used in a water resistant insultating tape
to give it thickness, stiffness and bulk.
You can also wrap the wire with a thicker wire(this worked the best IME).
Any little thing can break the smaller wires and cause a short and the
unit not to work anymore. Also, maintaining an even height above the gravel
is next to impossible with any ease.
I gave up after about 10 years of fooling with them. More trouble than they
were ever worth, yes, even the DIY.
> Thanks for the help.
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