that's true.
I haven't found my tw1 to be awfully inaccurate.
it's typically off by 5 percent either way which is accurate enough for me. 
It's a relative measurement device and I really don't need to have precise 
and totally accurate measurements at my station.
It works well for the average guy using a 100 watt radio and an antenna that 
exhibits a 4 to 1 or less SWR.
It's great for using an antenna tuner or for tuning an amplifier.  Will it 
be accurate down to a 10th of a watt or down to 3 points on an SWR 
measurement,  not really, but it certainly gets the job done and is pretty 
much on par with other cheap SWR/power meters out there.
It within 2 or 3 watts of any radio's watt meter, and certainly within 5 per 
cent of any radio's onboard SWR or tuners SWR meter that I've compared it 
with.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Gerry Learry" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, August 11, 2013 7:43 AM
Subject: Re: Playing with my Power Master 2


> Also with the TW1 you can build antennas and use manual tuners.  Maybe the
> reading isn't the most accurate, but you can at least tune for the least
> reflected, and the most out.
> ----- Original Message ----- 
> From: "Howard Kaufman" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, August 10, 2013 6:58 AM
> Subject: Re: Playing with my Power Master 2
>
>
>> In defense of the TW1, it seems to be consistently inaccurate.