[Elecraft] Palstar WM150L SWR Meter

[Pete Goudreau]

Larry East wrote:

> At 12:10 PM 5/1/02 -0500, Mike McCoy wrote:

>> Might want to check out the Autek Research WM-1 'Deluxe Computing
>> SWR/Wattmeter" as well.

>> http://www.autekresearch.com/wm1.htm

>> Its range is 20/200/2000w with selectable peak and average 
readings.
>> Half scale reading on the 20 w range is 5w so it's great for QRP. I
>> have one and love it.

> I have an Autek WM-1 and it is a nice meter, but it's accuracy
> degenerates very quickly below 10W.

So it's not the same circuit design as the Tandem Match then.  Makes 
more sense then to build the TM, I guess.

> This is not uncommon for Wattmeters that are not specifically 
designed
> for low power (could well be the case for the Palstar meter).

Yep, that's one of the concerns about the Palstar, and any meter I 
guess, and something I was hoping to find out in querying the group.  
The email from Palstar indicated that the bridge and circuitry were 
redesigned for the low power version in order to maintain accuracy, 
BTW.

> A good inexpensive QRP Wattmeter is the OHR WM-2; it has good 
accuracy
> down to about 25 mW or so. Full scale selections are 100mW, 1W and
> 10W. There is an easy "peak reading" mod posted on the ARCI web 
site;
> www.qrparci.org -- look for the "Technical/Projects" link).

Was unaware of the peak reading mod, thanks for that.

Thanks again,
Pete, AD5HD