[Elecraft] Re: QRP Dummy Load

[Tom Hammond]

This is much closer to what I'd like to see. Of course, it'll ultimately be 
up to Elecraft, and possibly the desires indicated by 'the group' as to 
what we see.

73,

Tom

At 05:55 PM 8/6/03, Don Brown wrote:
>Hi
>
>OK How about this: A small PC board with a BNC connector and pads for two 
>of the 35 watt TO-220 100 ohm resistors. The resistors would mount like 
>the output transistors in the K2 between the PC board and the box using 
>the same type of hardware. The PC should be laid out using stripline 
>techniques so it maintains a 50 ohm impedance. The box would be a KRC2 
>size box. Also on the PC board would be an 20 db attenuator and RF probe 
>with banana jacks to connect a DVM and a BNC to connect something like the 
>WM-2. The box would be the heatsink and could handle about 30 to 50 watts 
>for maybe 5 or 10 minutes or 15 watts continuously maybe even 100 watts 
>for about a minute or two. It should be cheap to kit and would do all of 
>the calibration required for the K2, K2/100 and the transverters. A stick 
>on label could be provided for the box with the power out to DC voltage 
>ratio on the internal RF probe. It should be designed with no calibration 
>in mind so someone building a K2 with no test equipment could build it and 
>not have to go out and find a calibrated meter to set it up by.
>
>Don Brown
>KD5NDB
>
>
>SNIP
>
>
>
>   Persinally, I'd prefer to have them keep it simple... maybe a tap and
>   detector which could be used with a Hi-Z DMM/DVM and maybe a (printed)
>   look-up table to calculate power into the dummyload, but nothing more
>   'involved' that that.
>
>   73,
>
>   Tom  N0SS
>
>
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