Re: Watt Meter
> Original Poster: "Vivian Watts" <V.C.Watts-at-btinternet-dot-com>
> Hi All,
> Being interested in the difference between the VA rating and the rms.
> power taken by my coil I managed to purchase a Watt meter at a local Amateur
> Radio Rally.
A very lucky find, considering all the discussions about power factor and
sync gaps recently !
> It is rated for A.C and D.C. but I'm not sure it is suitable
> for giving the true power on reactive loads and was wondering if anyone
> knew. It is a Weston Model 310 made in Newark NJ USA dated 1941. It is
> referred to as a electrodynamometer wattmeter. Frequency range to 133Hz.
> Viv Watts (UK)
I think this type uses a heated wire so it should be good for a wide range
of power factors and waveforms. Try checking it with a known resistive
load, and then with a reactive load like a shorted neon or PFC cap.
Have you done any more work with the sync gap, and simulations recently ?
Let me know if the real life measurements match the sims !
- In sunny Newcastle.