[Elecraft] Looking to add LP700 to KPA1500 - ideas?

[John Simmons]

There was a recent discussion about this on a forum I belong to, 
especially comparing the LP100 to a Bird. The original article 
describing the design of the LP100 (not 'A') by Larry said he calibrated 
the meter with a Bird 4410. I asked Larry about his calibration 
procedure on the LP100 (or LP500- can't remember) email reflector. He no 
longer uses a Bird for calibration! So many hams (and CB'ers) think a 
Bird is the ultimate in accuracy.... not so! However the Telepost meters 
are not field instruments! Check recent posts in the reflector I 
mentioned to see Larry's calibration procedure.

BTW, Ameritron/MFJ use an LP100 to calibrate their meters!
-- 
-de John NIØK

Don Wilhelm wrote on 5/20/2020 5:20 PM:
> The Telepost LP100 (and I expect the LP700) are calibrated to NIST 
> traceable standards.  I bought an LP100 kit (no longer in kit form) 
> and did my own calibration after construction - then sent it to Larry 
> for his real calibration.
> Although Larry will not commit to it, I suspect the accuracy to be in 
> the vicinity of 2% or better.
>
> There are a number of LP100s in the Elecraft working area.  I don't 
> know how often they are sent back to Larry for a calibration check.  
> What I do know is that they are better than the average Bird used by 
> hams.
>
> 73,
> Don W3FPR
>
> On 5/20/2020 5:52 PM, Mark Goldberg wrote:
>  Hams tend to treat uncalibrated test
>> gear as gospel. An external power meter, just because it reports to the
>> nearest 0.1W isn't necessarily better. Any commercial operation 
>> calibrates
>> on a regular cycle. Being a slightly less cheap Ham than most, I do 
>> get one
>> scope / spectrum analyzer calibrated every year, so at least I have
>> something to compare the other stuff to.
>>
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