[Elecraft] Re： Attenuator and RF Gain Settings

[Hector Padron]

Thanks Johny,that's the best way to operate any radio,unfortunately it has a small negative part and is that the S meter will move up been out of calibration when you turn the RF gain counterclockwise but that's not a big deal after all.Only radio I remember will read always the same S level no matter where you set the RF gain is the TT Orion that I owned for a year.
So we all are waiting still for the P4 right ?
 
AD4C

"For a refined ham it is compulsory to own a k3"

--- On Mon, 2/1/10, Johnny Siu <vr2xmc at yahoo.com.hk> wrote:


From: Johnny Siu <vr2xmc at yahoo.com.hk>
Subject: Re： [Elecraft] Attenuator and RF Gain Settings
To: "Hector Padron" <ad4c2008 at yahoo.com>, "Jim Brown" <jim at audiosystemsgroup.com>
Cc: elecraft at mailman.qth.net
Date: Monday, February 1, 2010, 2:56 PM


Hello Hector,

I concur your view.  I always lower the RF gain to a point equal to the band noise in the s meter.  I find many operators just let the RF gain always fully clockwise.  Of course, 6m will need a bit more sensitivity.

73

Johnny VR2XMC



----- 郵件原件 ----
寄件人﹕ Hector Padron <ad4c2008 at yahoo.com>
收件人﹕ Jim Brown <jim at audiosystemsgroup.com>
副本(CC) elecraft at mailman.qth.net
傳送日期﹕ 2010/2/1 (一) 10:09:07 PM
主題： Re: [Elecraft] Attenuator and RF Gain Settings

I am 61 years old and more than 40 as a ham and always since I started on hamradio with the tube type receivers has used the volumen control almost to the maximun and then control the signal with the RF gain control,no matter which radio you will be using,this is the best way to cut down band noise and close freq QRM,,without a doubt the K3 is the highest performer in the market and doing this it will work even better,I have never used my preamp,not even on 10M,the K3 has enough sensitivity not to use it,on 40 and 80M I always have my ATT engaged and I am able to pull any weak dx station no matter how weak it is and even with a strong one at 2Khz away my freq.
My two cents.
 
AD4C

"For a refined ham it is compulsory to own a k3"

--- On Sun, 1/31/10, Jim Brown <jim at audiosystemsgroup.com> wrote:


From: Jim Brown <jim at audiosystemsgroup.com>
Subject: [Elecraft] Attenuator and RF Gain Settings
To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
Date: Sunday, January 31, 2010, 10:09 PM


On Sun, 31 Jan 2010 14:23:33 -0500, Brian Machesney wrote:

>For the first time, I turned on the K3's ATT and found that I was even
>better able to separate callers, particularly when trying to pick out
>relatively weaker EU signals from stronger NA signals responding to my CQ.

Those of us with lots of grey hair learned 50 years ago that the most 
important control on our receiver was the RF Gain. They didn't come with 
attenuators or preamps in those days, but we also learned to switch them to 
a shorter antenna when they got overloaded. 

With a modern radio, on bands below 20M, the ATTenuator should almost 
always be ON and the PREamp should almost always be OFF for the greatest 
ability to separate weak signals from strong ones. On 20M you can usually 
turn off the ATTenuator, but you may not need the preamp until you go to 
higher bands. 

Another hint -- to pull really weak ones out from between strong signals, 
turn down the RF gain to the point where you are just hearing the weak one. 
During the 160M contest this weekend, preamp was off, ATT was on, and my RF 
gains were at about 2'o'clock. 

73,
Jim K9YC


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