[NLRS] Aurora Rumor

[Dr. Gerald N. Johnson]

On 3/11/2013 2:14 PM,  Jim Froemke wrote:
>
>
> Rumor has it that there may be another Aurora meeting this spring. I've not
> seen anything on this topic (other than Bill's request for presenters) so
> I'll attempt to create a little chatter here.
>
> Maybe we as a group can pool our resources and help with RF power
> measurements. In my case I have several needs, you may have others:
>
> 1.      Measurement of microwave RF power amplifier outputs - not just 10
> GHz
Most easily done with a directional coupler suitable for the frequency 
and a broad band diode detector. Not to 1%, maybe not to 10%. I'll 
talking on that at Aurora, how to make.
>
> 2.      "Approximate" calibration of my current, un calibrated RF power
> meter (HP431C) - this need not be exact but I'd like to be in the ball park

Look for the power meter calibrator at W1GHZ's web site. The way the 
HHP431C works its close to inherently calibrating. It substitutes DC 
heat for the thermistor to make the pair show 50 ohms to the RF port, 
and when RF arrives, it reduces the DC to keep the thermistors at the 
same resistance and so the DC reduction is directly the RF addition.
>
> 3.      Measurement of my current, un calibrated weak signal source power
> outputs on several microwave bands - not total broadband power output

Takes a clean signal source for each band to compare with attenuation to 
the signal heard in the receiver on each band.

I may touch on that in my presentation also.

73, Jerry, K0CQ
>
>
>
> Perhaps some of our highly compensated technical consultants that we have on
> retainers could come up with some ideas on how we could accomplish these
> during the Aurora get together. Maybe someone other than Donn and Berry who
> already help out on antenna and sun noise measurements?
>
> These and other activities may help sustain/grow the interest in and
> attendance at Aurora.
>
>
>
> See you there (May 11th I think),
>
>
>
> 73, Jim
>
> K0MHC
>
>