[ARC5] 10 meter BC-454 - a bit more

[Geoff]

>> There is an increase of 6 times between the noise output without the 
>> antenna and with it.
>> 2 V pk-pk without and 12 v pk-pk with it.
>>
>> I am using the formula db=20Log (V1/V2).
>>
>> 15.6 db seems significant to me.
>
> You made me get out my Faber Castell 52/82 slide rule.
> 15.6 db is correct. In this case, it doesn't matter whether the voltages 
> are
> expressed in pk-pk or peak or RMS, so long as they're both expressed
> in the same terms so it's then simply a voltage ratio.
>
> I'm rather surprised at the figures. They seem to indicate you have a very
> high noise level on 28 MHz in your area.
>
> 73 de Neil ZL1ANM
>


Just remember that the old sensitivity measurement standard was dBuV or just 
uV for xx dB SNR.
These days it is done at dBm and with MDS thrown in.

Carl


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