[Elecraft] K2 Resistor Tolerance

Sat May 17 12:29:00 2003

Hi Bill,

I was not quite clear in my earlier statement about the power display.
I was refering to the input power, which is calculated from the input voltage times input current.
If the displayed current is not accurate, the calculated power will be inaccurate. Of course this doesn't really effect the
operation of the K2, but it's nice to know what's happening if you want to calculate efficiency.

The output power from the xmtr is measured by a different circuit and that also has some 1% resistors,
R67 and R68, on the RF board.  These resistors should be in the proper ratio too.

73/ Bob - AG5Q

----- Original Message -----
From: "Bill Henderson" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 17, 2003 10:36 AM
Subject: Re: [Elecraft] K2 Resistor Tolerance

>
> Hi
>
> Thanks to all who took the trouble to answer..
>
> I am still stuck though. Why would the manual tell you to check the 1%
> resistors with an ohmeter if a resitance outwith the tolerance wasn't
> mportant.
>
> Bob AG5Q says that it effects the accuracy of the power readout. Since I
> will be using the K2 for QRP this is important to me.
>
> I'll stick the resistor on the board but will probaly change it later.
>
> Thanks for your help.
>
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