Thanks Don - My dummy load showed a 1:1 SWR on 40m with my last radio, but I
have not used an analyzer to look at it. I suspect I'll be "close enough"
(or at least I hope it is!) I think you are supposed to do the cal at 5
watts so no worries exceeding the power on the probe.
73 Tom
On Fri, Jul 17, 2009 at 9:58 AM, Don Wilhelm <
[hidden email]> wrote:
> Tom,
>
> Yes, you can use the RF probe. It *should* be OK up to a max of 20 watts
> measuring across a 50 ohm dummy load. The 1N34A diode is rated at 45 volts
> peak reverse voltage, so if you exceed 30 volts RMS (the RF Probe reads in
> RMS volts), you are nearing the limit.
>
> The accuracy of your measurement depends on the accuracy of your dummy
> load. It would be wise to check it with an antenna analyzer at the
> frequency you will be using for calibration (40 meters is preferred)
>
> 73,
> Don W3FPR
>
>
> Tom Campie wrote:
>
>> Hey guys, I'm going to finish my KAT2 tonight and I need to calibrate the
>> power and all that stuff. I have a 50 ohm dummy load so the SWR cal is
>> good
>> but I dont have a power meter. Can I use the RF probe that was made
>> during
>> the construction of the K2? If so, is there some documentation somewhere
>> on
>> how to do that? (note -I did not build my K2 so I have not used the
>> integrated test equipment)
>>
>> Tom W0EA
>>
>>
>
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