[1000mp] MP Roofing Filter from INRAD

[D. J.]

On May 18, 2004, at 8:51, Pete Smith wrote:

>
I've A-B ed between my IC775 and MPMKV numerous times on all bands with 
and without preamps (tuned and flat, #1&2) and I cannot honestly say I 
hear a difference in picking up very weak signals.  I had alway thought 
the 775 was hard to beat on 10 and 15 but this MKV (Mfg Feb 04) for all 
practical purposes is just as good and mine's unmodified.  I'll be 
looking at the roofing filter.  That will be a worthwhile addition in 
receiver performance.

Dale, K9VUJ


> I've got to say that even on 10 meters, I have never noticed the 
> difference in background hiss on my Mark V since installing the mod 
> (once I adjusted the IF gain per recommendation).  With my antennas, 
> there is a noticeable drop in noise when I disconnect the antenna 
> input, so I can't see where the hiss reduction is an issue here.  I 
> can reliably hear people who are far too weak even to make the S-meter 
> start to indicate.  I suspect this hiss is more an issue for people 
> using MPs with transverters or people in super-quiet locations.
>
>
> 73, Pete N4ZR
> The World HF Contest Station Database
> was updated on April 26, 2004
> 2706 contest stations at
> www.pvrc.org/WCSD/WCSDsearch.htm
>