Posted by
Don Wilhelm-4 on
Dec 17, 2009; 2:15pm
URL: http://elecraft.85.s1.nabble.com/Noisy-K-3-Receiver-tp4173832p4181471.html
The other thing that helps (and helps a LOT) is to reduce the RF Gain
until the band noise is at a lower level - just barely present. Yes, it
will likely be different for each band, but can be quickly set by
listening to a spot with no signals and listen for the "frying noise" to
be barely perceivable. Turning on the attenuator is also helpful.
Right now, I am listening to an 80 meter local roundtable with the
attenuator on, the RF Gain at 2 o'clock and the AF Gain at 9 o'clock.
For those who are hesitant to do reduce the RF Gain because the S-meter
changes when the RF Gain is reduced, the K3 has an absolute (ABS)
setting for the S-meter, and you have an S-meter that is not influenced
by the RF Gain nor the preamp nor ATT.
73,
Don W3FPR
chen dave wrote:
> My suggestion:
> 1, upgrade to lastest f/w
> 2, tune the center of the passband to 1.4~1.45k(very important)
>
> Hope those will helps!
>
> all the best!
>
> David,BA4RF
>
>
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