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Re: [Amps] PEP Reading Wattmeter

Subject: Re: [Amps] PEP Reading Wattmeter
From: Steve Thompson <>
Date: Mon, 05 Oct 2009 21:45:58 +0100
List-post: <">>
> The Array Solutions Power Master is actually more accurate than a Bird 43. 
> Check the specifications.
> Accept for the display getting dim and the segments getting burned in on 
> mine, I love it.
> 73
> Jim W7RY

Don't trust the accuracy - into a real aerial it's very dependent 
on the directivity of the coupler used. The VHF/UHF one is all but 
useless (25dB typ.) and they spout a load of nonsense in section 
3.2 'VSWR accuracy'.

If the VSWR reading changes with cable length, the sensor is not 
good enough.

I couldn't spot any directivity numbers for the hf ranges.

For all practical purposes it makes no difference that matters, 
but to me it's somewhere between sleight of hand and snake oil.

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