[R-390] Image problem solved - Not.

Bob Camp ham at cq.nu
Thu Oct 25 19:51:13 EDT 2007


Hi

If you are going to run with one side of the balanced input shorted  
to ground - the radio must be aligned in this configuration.  
Grounding "half the input" noticeably throws off the alignment.

Bob

On Oct 25, 2007, at 7:40 PM, Tony Casorso wrote:

> Sorry everybody,
>
> I lied. I didn't mean to but I did. Tonight I tried to repeat the  
> experiment and it doesn't work.
> Lifting the ground from one side of the balanced input does  
> absolutely nothing to help the situation.
>
> I'll bet that I had a bad connection to one side of the balanced  
> connector since I had to jerry rig it to connect my BNC from the  
> antenna to the balanced input without ground. I hear no harmonic at  
> all when only one pin of the balanced input is connected to the  
> antenna. I also hear only a faint hint of a harmonic when I use the  
> unbalanced input.
>
> So, I still have the problem (if it's really a problem). It's not  
> an image problem really. I'm sorry I called it that. It has nothing  
> to do with the IF.
>
> I'm going to go away now. I'll make sure everything is repeatable  
> before I bring it up again.
>
> I feel like the Rockies must feel after the disaster in Fenway last  
> night. Well, maybe not quite that bad.
>
> Tony
>
>
>
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