[1000mp] Inrad roofing mod to Mark V

4x1ad 4x1ad at iarc.org
Sun Jan 30 13:47:01 EST 2005


If I good remember, the S-meter calibration it's little bit "unusual" for 
FT-1000MP: 100uV for S-9 with preamp-on and 335uV with preamp-off.

73
Morel
4X1AD

----- Original Message ----- 
From: <KB9GKC at aol.com>
To: <1000mp at mailman.qth.net>
Sent: Sunday, January 30, 2005 6:56 PM
Subject: Re: [1000mp] Inrad roofing mod to Mark V


>
> In a message dated 1/29/2005 11:38:04 P.M. Central America Standard ,
> augie.hansen at comcast.net writes:
>
> After  putting in
> the roofing filter I set it to 14 to maintain S9 for a 50 uV  input.
>
>
> Hello All,
>
> 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
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