[1000mp] New Roofing Filter

[D. J.]

My opinion is it is a very worthwhile purchase providing you have to 
deal with heavy QRM such as in contests or DX.  Even rag chewing on 75 
at night can be troublesome.  With this filter you will have a much 
better chance of pulling that weak signal out from all the QRM.

No insertion loss, in fact I think it might be a little gain.  There is 
an onboard amp to compensate for this.  The installation instructions 
state that if you had the other amp board installed you should bring 
menu 9-1 back up to where it was from the factory.

The only trade off is if you are a hi-fi audio follower, you might 
loose a bit of frequency response, but I've found with the standard 
Yaesu SSB filter there is no detectable difference.  In fact using the 
6 Khz filter I detect a noticeable increase in fidelity.  I've listened 
to SW broadcast and they sound just fine.

Dale, K9VUJ


On Oct 6, 2004, at 11:17, wx5l at charter.net wrote:

> I have a question for those who have recently installed the new Inrad 
> roofing filter.
>
> 1. Can you detect insertion loss? Was it necessary to 
> adjust/compensate the IF gain in Menu 9? Did it affect the sensitivity 
> in any way? I have presently the IF mod installed and feel it's a 
> worthwhile improvement for signal to noise improvement but do you lose 
> this in favor of better dynamic range?
>
> I have read the pdf file and understand what this filter is doing but 
> is there a trade-off.
>
> 2. Is it worth $165.00?
>
> 73,
> Randy
> WX5L
>
>
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