K3 10M Birdie

[Mike Harris-9]

Hi,

Anyone else seeing a birdie on 28004.9+/-?

With no antenna, CW, 500Hz hardware filter, 50Hz DSP, I see DISP readings:

-21dBV pre-amp OFF
-1.4dBV pre-amp ON

In either case the ATT makes only another -2dBV difference.

It doesn't display on the S-meter but given many workable signals don't on
10M it is relevent.

Regards,

Mike VP8NO

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[john petters]

Mike Harris wrote:
> Hi,
>
> Anyone else seeing a birdie on 28004.9+/-?
>
Hi Mike
I have it also.
73
John G3YPZ
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[gm3sek]

Mike Harris wrote:

>Hi,
>
>Anyone else seeing a birdie on 28004.9+/-?
>
>With no antenna, CW, 500Hz hardware filter, 50Hz DSP, I see DISP readings:
>
>-21dBV pre-amp OFF
>-1.4dBV pre-amp ON
>
>In either case the ATT makes only another -2dBV difference.
>
>It doesn't display on the S-meter but given many workable signals don't on
>10M it is relevent.
>

I don't hear a birdie on that frequency, but centred around there is a
broad peak of rasping noise and transient carriers that only appear
while rotating the VFO A knob.


--

73 from Ian GM3SEK
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[Evert Bakker (PA2KW)]

That's what I hear as well.

73'e, Evert PA2KW

-------------------------------------------------------------------

I don't hear a birdie on that frequency, but centred around there is a
broad peak of rasping noise and transient carriers that only appear
while rotating the VFO A knob.


--

73 from Ian GM3SEK
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[ab2tc]

I have the birdie at 28004.5kHz. No raspy noises when tuning.

Knut - AB2TC

Evert Bakker (PA2KW) wrote

That's what I hear as well.

73'e, Evert PA2KW

-------------------------------------------------------------------

I don't hear a birdie on that frequency, but centred around there is a
broad peak of rasping noise and transient carriers that only appear
while rotating the VFO A knob.


--

73 from Ian GM3SEK

<snip>

[Julian, G4ILO]

What's the big deal with birdies? Perhaps if you are operating from the middle of nowhere miles from the nearest computer the bands are actually quiet unless a real signal is present. Here there are so many unmodulated carriers and other noises from computers, computer peripherals, cordless phones, TV set top boxes, burglar alarms and goodness knows what else that you just get used to them. If some of them were actually generated from within the K3 I would never know.

[Evert Bakker (PA2KW)]

I do!

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of G4ILO
Sent: Sunday, May 25, 2008 22:06
To: [hidden email]
Subject: RE: [Elecraft] K3 10M Birdie


What's the big deal with birdies? Perhaps if you are operating from the
middle of nowhere miles from the nearest computer the bands are actually
quiet unless a real signal is present. Here there are so many unmodulated
carriers and other noises from computers, computer peripherals, cordless
phones, TV set top boxes, burglar alarms and goodness knows what else that
you just get used to them. If some of them were actually generated from
within the K3 I would never know.

-----
Julian, G4ILO  K3 s/n: 222 K2 s/n: 392
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf
--
View this message in context:
http://www.nabble.com/K3-10M-Birdie-tp17458757p17461803.html
Sent from the Elecraft mailing list archive at Nabble.com.

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[Mike Harris-9]

Hi,

No big deal, it just gets in the way occasionally, just like a similarly
placed offering in the K2, albeit that one has a different source.  For
what it's worth, I've been working signals on 10M this weekend somewhat
lower in strength than this particular birdie.  No band noise at all when
plugging the antenna in.

If you use WSJT on 6M you will even find 'em -25dB, one cost me a
completion on EME, mainly due to operator error on my part and I wouldn't
expect Elecraft to try and sort sub noise level signals out.

So yes, some of us routinely work at very low receive signal levels in
reasonably quiet locations, even on HF.  You just have to remind yourself
why the other guy can't hear you.

Regards,

Mike VP8NO

----- Original Message -----
From: "G4ILO" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, May 25, 2008 4:05 PM
Subject: RE: [Elecraft] K3 10M Birdie


| What's the big deal with birdies? Perhaps if you are operating from the
| middle of nowhere miles from the nearest computer the bands are actually
| quiet unless a real signal is present. Here there are so many
unmodulated
| carriers and other noises from computers, computer peripherals, cordless
| phones, TV set top boxes, burglar alarms and goodness knows what else
that
| you just get used to them. If some of them were actually generated from
| within the K3 I would never know.

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[KM5Q]

I have it too. It's a clean carrier, too weak to indicate on the S  
meter.

Windy KM5Q
#764
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