Joe,
I think you may have hit on some major part of the "problem" here. I
measured the passband (and out of passband) response of my K3 and my K2,
Yaesu FT-900 and Yaesu FT-817. All measurements were with the SSB
filter in all transceivers, and the K3 DSP width was set to maximum. My
K2 has
Don Wilhelm-4 wrote:
>
> My conclusions: I am not certain what K3 owners are perceiving as noise
> any more than I had been before these tests. The flatter passband of
> the K3 may be sub-consciously perceived as being more 'harsh', but I
> could not equate that to 'noise'. The other filt
t: Saturday, December 19, 2009 5:14 PM
> To: li...@subich.com
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] : K3 receiver noise - my test results (long)
>
>
> Joe,
>
> I think you may have hit on some major part of the "problem" here. I
> measure
d audio
> noise is <140 dBV.
>
> 73,
>
>... Joe, W4TV
>
>
>
>
>
>
>
>
>
>> -Original Message-
>> From: Don Wilhelm [mailto:w3...@embarqmail.com]
>> Sent: Saturday, December 19, 2009 5:14 PM
>> To: li...@subich.com
Don Wilhelm-4 wrote:
>
> I do data modes
> frequently, and prefer the flat response of the K3.
>
So do I. RX EQ is now (thanks, Wayne) disabled in data modes, so you can
shape the response any way you want for SSB without interfering with digi
operation.
It needs to be flat for FM, especial
nd FC=2.00 and 2) "NORM" using the "pink EQ" settings (1.60=-3,
>> 2.40=-5, 3.20=-6).
>>
>> Note the K3 audio amplifier is the cleanest hands down. The other
>> transceivers had noise floors at about -120 dBV (IC-706 mkIIg was
>> -100 dBV). Exc
y marginally related
to the "noisy receiver" complaints.
73,
... Joe, W4TV
> -----Original Message-----
> From: Don Wilhelm [mailto:w3...@embarqmail.com]
> Sent: Sunday, December 20, 2009 12:42 AM
> To: li...@subich.com
> Cc: elecraft@mailman.qth.net
> Subje
Hi,
Is it just me that have two fairly strong audio spurs at 3.9 and 7.8kHz? By
"strong" I mean about 70dB below an AGC saturated CW tone. This is on the
line out. The level of these tones are independent on RF gain setting and
also independent of the CONFIG:LINE OUT setting. My line out is set a
Hi again,
Sorry, that link will only work from inside my LAN. Here is a correction:
http://ab2tc.getmyip.com:82/pictures/k3_line_out_50uv_lev016.png
Knut - AB2TC
ab2tc wrote:
>
> Hi,
>
> Is it just me that have two fairly strong audio spurs at 3.9 and 7.8kHz?
> By "strong" I mean about 70dB
Knut,
No you are not the only one, but there are remedies. See Jack Smith's
information at
http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm.
Then install the resistors as indicated in the Elecraft K3 AF Stage
Upgrade Instructions.
73,
Don W3FPR
ab2tc wrote:
> Hi again,
>
> So
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