[R-390] Krohn Hite 3200

[Tom Norris]

I suppose you could drive it from the diode load with its output  
feeding the audio deck. You may end up trying several different ways  
to see which works best.  It shouldn't have any problem with the  
signal level coming from the diode load, since the input limit is 4.5  
volts for both the 3200 and 3202. I've not used the filter with any  
equipment, but I've calibrated a few dozen of them at work, they can  
be fairly forgiving impedancewise, give it a try between diode load  
and the audio deck first off.

But... if you have a dual 3200, then you have a 3202, there are  
several ways to use it for a notch/bandpass filter and the thing  
should work fine at IF frequencies as well as  audio. I think it's  
good to 2Mhz in high/low pass.  In fact it might even be easier to  
use at IF freqs.  If you were to use it on the 455 Khz IF freq, you'd  
just leave it on the x10k scale and tune around for the notches.  To  
use it for audio you'd end up having to switch between the x10 and  
x100 positions, bands 2 and 3 IIRC and unless you were just going to  
set it up for a single notch freq and leave it, it would drive you  
batty running back and forth setting it up each time.  You might want  
to refresh my memory, or hopefully someone else is more familiar with  
this than I am.


Tom NU4G


On Sep 7, 2006, at 1:56 PM, Masters Andy wrote:

> G'day group. I just purchased a Krohn Hite 3200 dual
> filter which I intend to use as a bandpass filter or
> as a notch filter with my R-390A.  Originally I was
> going to use it on the audio output to speaker but
> when I got it, I discovered it has a 100K input/output