I have an LP100A wattmeter and like it very much. But how do any of
you know how accurate it really is? The only way to know is with a
calibration standard, and RF power is notoriously difficult to measure
accurately. I've compared the LP100A to the Alpha 4510, and a
MeterBuilder MB-1, and by measuring the RMS RF voltage (with a
calibrated Tek oscilloscope) across a 50 ohm dummy load. There's no
obvious consistency among these wattmeters. The readings vary from one
another with frequency and power level, by as much as five percent. My
guess is that the MB-1 is likely the most accurate, based on the
calibration curves and methodology supplied by the manufacturer. But
that is still just a guess.
73,
Jim w8zr
Sent from my iPhone
> On Jun 18, 2017, at 11:18 AM, WK1W-Ivan Shapiro <WK1W@ivanshapiro.com> wrote:
>
> K9YC wrote the below,post. I concur 100%.I have the dual coupler unit also.
> I run it with Drake L4B and Alpha 77SX. Let's me check higher output into
> Palstar DL5K from the Alpha. Very accurate meter.
> 73
> Ivan WK1W
>
>
> N8LP's products are first rate. I own his LP100A, which I use with two
> probes, one on each of the power amps in my SO2R station. Thanks to
> their accuracy, I can run closer to legal limit than with lower quality
> units.
>
> 73, Jim K9YC
>
>> On Sat,6/17/2017 12:51 AM, Conrad PA5Y wrote:
>> That is very nice indeed but I just know that I will not be able to
>> justify the price. It appears to be an excellent product!
>
>
>
>
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