I don't understand why you would want to use the peak reading function to tune
an amplifier. The time delay before decay just makes tuning harder and doesn't
really add any value.
I also have an LP-100A and an antenna tuner that is rarely used. The tuner has
a wattmeter in it that I leave on instantaneous mode and use that to tune the
amp.
If you're using a pecker or some other pulsing device (completely unnecessary,
IMO) an instantaneous reading meter will indicate a bit low, but since you're
tuning for a peak, it doesn't matter.
Al
AB2ZY
-----Original Message-----
> Date: Fri, 2 Mar 2012 19:07:57 -0800
> From: audioguy@q.com
> To: Amps@contesting.com
> Subject: [Amps] Elecraft W2, or other"best" meter for tweaking the beast(s)?
>
> Has anyone tried the Elecraft W2 bar-graph wattmeter for tweaking
> their legal-limit amp? I read somewhere that the peak-hold is
> something like a second. If so, probably too long to be useful for my
> purposes.
>
> I have a calibrated LP-100A, and while it's plenty "accurate" enough
> for most amateur use, the display doesn't update quickly enough for
> easy tuning in normal peak mode, and the peak hold is something like
> 10 seconds - again not useful for tuning an amp.
>
> So... I also have a Bird 43 with a peak-reading board, which actually
> works fine for bench use, but isn't great as a fixed-station device.
> The one I keep going back to is the old Heathkit HM-2140 with the
> op-amp peak circuit. The timing of the peak-hold circuit just seems to
> work for me for tuning amps, but the meter faces are relatively small
> and it's quite old now.
>
> Again - I'm not looking to start another accuracy debate. Ultimate
> accuracy really isn't the point - I can use the LP-100A at the end of
> the circuit for absolute readings. Ease of use, timing of the
> peak-reading circuit and other amenities for tuning amps are the
> criteria I'm using here.
>
> Thanks,
> Jim N7CXI
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