[ICOM] 7800

[mecker at peoplepc.com]

thank you for this very practical advice
----- Original Message ----- 
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Thursday, July 03, 2008 2:13 AM
Subject: RE: [ICOM] 7800


> Hi Marc,
>
> You can measure (S+N)/N with an AC voltmeter (a VU-meter or a DMM). 10 dB 
> =
> 3.16 as a voltage ratio. No ears needed.
>
> Connect the meter across the speaker output, set the AF gain control for 
> 50
> mV on noise alone, and increase the RF signal power until the indicated
> voltage is 160 mV. This is the receiver sensitivity for 10 dB (S+N)/N.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] 
> On
> Behalf Of mecker at peoplepc.com
> Sent: 2-Jul-08 22:34
> To: ICOM Reflector
> Subject: Re: [ICOM] 7800
>
> Have one. Trying to find out what to expect overall from this models
> S-meter. Since I have a hearing loss, its not easy for me to test (s+n/n)
> Wondering if this S meter (being digital and all) tends to be 
> conservative.
> Rigs like my ft-847 greatly exaggerate s reports.
> -Marc.
>
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