[1000mp] Inrad roofing mod to Mark V

[Augie Hansen]

On 1/30/05 9:56 AM, "KB9GKC at aol.com" <KB9GKC at aol.com> wrote:


> I would like to suggest against the setting of 9.1 to get an S9 signal with
> 50 uV signal.  Think about this for a second, are we calibrating the S  meter
> or do we want the receiver to have the best weak signal reception?
> 
> Instead my thoughts are that the roofing filter should be installed and  then
> find a weak signal on the air (i.e. S-0)  close your eyes and adjust  9-1
> until you get the best reception of the S-0 signal.
> 
> The reality is that I don't care what the S meter reads, my goal is not to
> calibrate the S meter but rather to have the most quiet and sensitive
> receiver!
> 
> My 2 cents worth,
> 
> 73
> Douglas J

Your 2 cents worth accepted.

I had checked the S-meter reading before doing the mod and set the menu 9-1
value after the installation to obtain the same S-meter reading as a first
cut. I assume that Yaesu had set that parameter to 16 for a reason.

Because of the CQ CW contest this weekend (I participated as a QRP entrant
with my K2), I have not had time to fine tune the value, and under contest
conditions on top band, the chances of finding a weak signal in isolation
was nil. That task will be done later.

Cheers,
Gus / KB0YH