[ICOM] Using RF Gain

[W5JMW John]

Yes John,Also on the pro or 775.I do this often on 160.Pre-amp on and vary 
the rf gain.While it might not help with the noise floor.It appears too,and 
to my deag ears it seems to help.Again,I have no lab evidence of this,it 
just appears to help at times..73 john
----- Original Message ----- 
From: "John" <w5td at lcisp.com>
To: <icom at mailman.qth.net>
Sent: Saturday, June 17, 2006 11:10 AM
Subject: [ICOM] Using RF Gain


> Here is a question which I should know the answer to, but can't come up 
> with it at the present time.  I have an Icom 706 original, which I 
> generally run with the preamp on.  This makes HF kind of noisy, but 
> turning off the preamp makes the radio pretty deaf (QST measured the MDS 
> at -123dbm, 20 meters, preamp off).  Can I use the RF gain to reduce 
> sensitivity a bit to quiet things up?  A MDS of -130 or so would probably 
> be fine, but there is no way to achieve this by using the preamp and/or 
> ATT.  Can reducing the RF gain lower sensitivity while preserving S/N 
> ratio?
>
> 73s John W5TD
>
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