[R-390] Filter test

[Bob Camp]

Hi

If you are running into a 50 ohm input on the "detector" and have a 100K ohm resistor in series, you will see a *lot* of attenuation from that combo. You very much want to run into a 1 meg ohm input on something like a scope. 

The caps plus the stray capacitance plus the detector input cap should total to roughly 120 pf. Tuning is a bit critical since the Q is above 10. 

Bob


On Feb 23, 2013, at 1:33 PM, quartz55 <quartz55 at hughes.net> wrote:

> Here's my exotic test rig.
> 
> http://i251.photobucket.com/albums/gg287/DogTi/R390A/filterjig_zps784c4ade.jpg
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