Seeseng, Kent,

Thanks for the info. I tested both, Block transfomer and toraidal as I have both. LPPL YES! no significant different. Because we are using Piezo tweeter. For most distruction sound Hum and hiss where you heard clearly on Hi-fi Audio sytem when played with Piezo tweeter all the distrotion sounds are elliminated. That is  good about Piezo . In order to have good sound the tweeter play an important role I say probrably 70%. So good tweeter is the solution like those of Motorola but price is not cheap.

The Amp in the picture weighted 3.5kg. The weight came from Tranformer. For durability i think the Block transfomer is better. Any comment?

See Seng,

Thank you very much. By the way, what is LPPL stands for?

Back to the humidity and temp control, is a humidifier sufficient to control the two parameters, i.e. humidity and temp? I tend to think that we need to control them individually in order to be accurate, unless the difference is tolerable in most of the cases.

What say you?

By the way, is there a reasonable gadget that would be able to track the two parameters on weekly basis and yet able to give us a report with reasonable price? I saw my company is using a thermo-hygrometer with plottable chart, I guess it would be very expensive to have one.

Frank

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Added on October 3, 2007, 9:02 amSorry, not on weekly basis, but kind of half hourly basis, can be analog or digital storage/output.