[ICOM] IC756 with InRad filter problem

[Frank A. Ellis]

Phil,

I think the SSB filter should have been a plug in, and the CW filter a wire-in.

My guess is that something related to the wiring-in of the INRAD CW filter broke or came loose in transit.

The only way to verify is to open up the 756 and look carefully.

I also installed aftermarket filters in my 756 many years ago, but the details are fading for me, as well :)

Good luck!

73 Frank W3UHF







On Mar 12, 2013, at 8:09 AM, Phil Cooper wrote:

> Hi all,
> 
> I had an IC756, to which I installed two InRad filters. I believe they were
> the 111 and 116. I know one plugged straight in, while the other needed to
> be wired in.
> 
> I used them for RTTY, after doing something in the menu system to fool the
> IC756 that it had native Icom filters fitted.
> Whilst I had the radio, they worked well for me.
> 
> Now, here is the issue.....
> I sold the radio on, and had to ship it from Guernsey to Scotland. Somewhere
> along the line, something has happened, as the new owner tells me that he
> can hear nothing on CW when the filters are engaged, and that the bandwidth
> on RTTY is very poor, with attenuated signals too.
> 
> Can anyone tell me what I would have set in the menu, and what may have gone
> wrong in the journey?
> 
> I haven't used the 756 for ages, and now the radio and manual have gone,
> along with the memory of what I did and how.
> 
> 73 de Phil GU0SUP
> 
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73, Frank A. Ellis, W3UHF