[Lowfer] WA sending N/S for a change

[Bill Ashlock]

I just purchased 200ft of 3/8" refrigeration tubing and installed it in 
close proximity to the old N/S location. Very easy to pull this tubing over 
over the top using the shielded cable that I installed the previous day. The 
numbers are looking real good:  Rac = .44 ohms compared to .37 ohms for the 
.63" diam pipe loop and .60 ohms for RG-8. The previous shielded cable was 
approx .35" diam (without jacket) and figured to to be close to the RG-8 
performance - but in fact it read a lousy .88 ohms! These numbers indicate 
the soil is in a fully dry condition and relate closely with those in the 
third column of Table 2 of my second loop article.

The price of the 3/8" tubing was $20/50ft at Home Depot which amounts to 
less than half the new price for high quality RG-8. The performance is also 
better, as well. Total weight is 25 lbs for 200ft.

Bill A

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