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re: substrate heating
>No way. Dupla charges $90-140 for their cables. The one in my tank, a
>50-watter, makes about two full trips back and forth, making its length
>under 20 feet. That's still half the price Dupla would charge. The key
>is not being stronger than normal wire, the key is being more resistive!
>* Please please tell me the source for this! :) *
The company is:
Cooner Wire
9186 Independence
Chatsworth, CA 91311
818-882-8311
They sell wire they call Miniature Electrode Wire AS 155 Series which is
stranded copper with a silicone rubber insulation.
Part # Wire Gage ohms/foot
AS155-28 28 .066
AS155-29 29 .085
AS155-30 30 .108
AS155-31 31 .145
AS155-32 32 .170
AS155-33 33 .218
AS155-34 34 .272
AS155-36 36 .436
They also sell AS 180 Series wire which is stranded stainless steel with a
silicone rubber insulation.
Part # Wire Gage ohms/foot
AS180-28 28 2.8
AS180-29 29 3.57
AS180-30 30 4.56
AS180-31 31 6.13
AS180-32 32 7.18
AS180-33 33 9.19
AS180-34 34 11.48
AS180-36 36 18.38
AS180-38 38 30.63
AS180-40 40 45.94
They also sell wire they call Bioflex Insulated Wire. It can have either
clear non-hygroscopic fluorocarbon (FEP) or polyvinylchloride (PCV)
insulation. Wire sizes range from 28 - 40 gage with nominal resistance of
.066 to 1.08 ohms / foot for copper wire or 2.8 - 45.94 ohms / foot for
stainless steel wire. It is described as being ultra flexible and suitable
for implantation in vivo. It is multistranded.
I looked at using wire from this company and decided it was more money than
I wanted to spend so I used standard stranded 26 gage copper wire in my
tank. I also ran two lengths of wire and brought all four ends out of the
tank. Now if one wire is broken I will attach my transformer to the other
wire. This seemed a good safety measure to prevent having to tear down a
tank.
Mark