> have the heat exchanger grounded through a 0-1ma meter....My water
> reservoirs contain 12 liters of distilled water....
That should stay pure for a while! The Alpha Seventy's reservoir
(topped-off tube boiler, condenser, and feed line) is roughly 700 mL (about
3 cups of H2O). The bottom of the condenser forms a large portion of the
reservoir. Leakage is typically 1 mA @ 4KV. At 1KW TPO brick-on-the-key,
the assist from the whisper fan keeps the H2O temperature well under
boiling, although I've never measured it. That's actually a good parameter
to monitor. I'll need to think of a way to easily measure H2O temperature
without affecting system leakage current. Ideas, anyone?
Current leakage to
> ground is typically 200ua at room temperature rising to around 350-400ua
> at 40C....It takes a long CW session to warm the water past 30C with
> this system...
Bob, I sure would love to see some photos of that cooling system.
Paul, W9AC
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