Re: Wattmeters

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>

Hello Steve.

Tl> Original poster: Steve Conner <steve@xxxxxxxxxxxx>

>>changing the generator`s frequency determine when wattmeter`s
>>indication would start to decrease.

Tl> I have an audio amp that can put out about 300w from <5Hz to >100KHz.

100 khz only? more than 5 years ago i`ve projected a tube amplifier
(GM-70), which provided 3..300 khz at -3 db level, amount of feedback
was only about -6 db :-P

Tl> I could use this with a non-inductive dummy load and a scope to check
Tl> the amplitude (knowing the real wattage delivered is V^2/R)

no, you can`t use this, coz in reality we have a 50 hz signal at
the volage coil, so your results would be worse, than mine and
Terry`s. and having taken into account that a rather high impedance
resistor is connected in series with that coil- oh boy - you`ll
compromise a innocent wattmeter :-)))
or you`re going to test yours wattmeter without a resistor? or
kill-a-watt?

Tl> I'll try it next time I have my stereo dismantled :P

dismantled in pieces? :-)))
actually mine proposition gives chances to make measurments by _any_
coiler, coz it needs low-wattage (5-10w) amplifier, that could be
based on any cheapest TDA for example :-P

-----
I am skeptical about space aliens too, but space aliens have a greater
probability of existence in my opinion than extra garage space...
(c) Richard Quick  6-07-95 03:59