[ICOM] Testing IC-746 Plug In Filter

[Mark K3MSB]

Gents

Thanks for the many replies.    I suspect it's a page in the manual that
wasn't followed.

I'll report back what I find.

73 Mark K3MSB

On Wed, Sep 23, 2020 at 5:46 PM Jim Wilhite <w5jo2 at brightok.net> wrote:

> To test it external Mark, you will need to load the input and output at
> the
> same impedance it will see in the set.  Feed the matched input with your
> signal generator through a 3 pf. cap, electrolytic or poly type.  Then use
> a
> 3 pf. cap attached to the output and look at it with your scope.  That
> will
> take some math but you are good at that.
>
> Actually if you can get to the connections in the set, just use a scope
> and
> set it to X 10 and low voltage.  Feed your generator into it and follow
> the
> trail, I assume it is a 9 meg IF filter.
>
> 73,
>
> Jim
> W5JO
>
>
>
> -----Original Message-----
>
> Hello
>
> A friend installed a filter into his IC-746 and it's not working.
>
> Assuming he followed the procedure etc,  is there any way I can test the
> filter  external to the radio to see if it's working (or at least not dead)
> ?
>
> Thanks!
>
> 73 Mark K3MSB
>
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