[Elecraft] KAT2 SWR readings ?

Mon Mar 31 12:19:00 2003

Hi

You can make a nice dummy load for QRP power levels by connecting 2 100 ohm
3 watt MOS resistors (Mouser # 283-100) in parallel in a PL259 connector.
Twist the leads on one end of the resistors and solder them to the center
connector pin of the PL259. Then bend the leads on the other ends of the
resistors around and solder to the shell of the PL259. The resistors should
fit all the way inside the connector shell. Be sure to put the outer
threaded shell on before you solder the resistors to the PL259. Use a BNC to
SO239 adapter to connect the dummy load to the K2 or K1.

I have several of these with different values of resistance 25 ohm 50 ohm
100 ohm and 150 ohm I use the values other than 50 ohms for adjusting or
testing the KAT2 or KAT100 so I can get a 2:1 or 3:1 SWR ratio. These dummy
loads will take 10-15 watts for a short time.

Don Brown
KD5NDB

----- Original Message -----
From: "Tom Hammond" <[email protected]>
To: "Dave @ Interaccess.com" <[email protected]>;
<[email protected]>
Sent: Monday, March 31, 2003 9:56 AM
Subject: Re: [Elecraft] KAT2 SWR readings ?

> Hi Dave:

Snip

>
> What are you using for your 50 Ohm dummyload? We've found that some
> dummyloads will also 'offer' added reactance as the frequency increases.
> Additionally, in order to do a credible job, you should strive to connect
> your dummyload to the KAT2 through a SHORT (less than 3', and preferably <
> 1') coax cable. Direct-connect is even better.
>
> Try using a couple 100 Ohm 2W NON-INDUCTIVE resistors in parallel and
wired
> directly into a BNC connector. This should provide a near-50 Ohm load with
> little stray reactance.
>
> Good luck,
>
> Tom Hammond   N0SS
>