Having received signal reports that my audio from a number of different
microphones was lacking in top I did the following after modeling the
appropriate circuit values on the KSB2.
As per KD2BD mod, changed C34 from 2.2uF to 0.47uF moved LF -3dB response from
about 80Hz to 400Hz. Did not chang
I'm getting a birdy near 28.020MHz with my K2/100. Is there anything that can
be done to eliminate this or move it a few kHz?
Tom K2TA
K2 #1117
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I monitor 28.020 for long periods with my K2 for a VHF beacon on 70.020 MHz
that transverts to that frequency. No detectable birdy in my QRP K2 at all on
this frequency.
Bob, G3VVT
K2 #4168
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Hi Tom,
I monitor 28.020 for long periods with my K2 for a VHF beacon on 70.020 MHz
that transverts to that frequency. No detectable birdy in my QRP K2 at all on
this frequency.
I just checked mine also, with and without an antenna connected. Could
not hear any birdie here.
Could it be som
I found a birdie at 28.000 (QRP K2 #3401), but that's too close to the
band edge to worry about. None at 28.020. I'm guessing my birdie is a
harmonic of the 4.00 MHz oscillator. Is it possible your tuning is off
by 20 KHz? Until I got it right, my K2 dial clibration was off quite a
bit on 1
In a message dated 01/01/05 12:11:56 GMT Standard Time,
[EMAIL PROTECTED] writes:
I found a birdie at 28.000 (QRP K2 #3401), but that's too close to the
band edge to worry about. None at 28.020. I'm guessing my birdie is a
harmonic of the 4.00 MHz oscillator.
--
Hello and Happy New Year,
The temp is now in the 40's here in PA and is going up to 60's later. I
have some things I have to do outside around the QTH but I can't pass up the
Great weather.
So I should be on the air around between 15:30 and 16:00 UTC. I will be at
the pond on the Appalachian
Not a sound from them (KPH), on either 80 or 40, around 2200 hrs PT (0500z).
Maybe they broke it of and joined the festivities.
Carry on
K2Bill#973
> All I hear is noise on East coast but got in 3 stations from nearby states.
>
> Ron wb1hga
>
>
>
> Hey all, K6KPH (KPH) is on the air for
W3FPR replied to KH6AT that gated noise blankers cannot be expected
to work when the noise pulse is insufficient to reach the gating threshold
& that more signal might improve performance when blanking weak
noise. Sounds reasonable, but...
I believe my other radios have gated noise blankers. Th
See comments below:
- Original Message -
From: "VR2BrettGraham" <[EMAIL PROTECTED]>
To:
Sent: Saturday, January 01, 2005 9:37 AM
Subject: Re: [Elecraft] Question about KNB2 Noise Blanker
(GainreductioninNB2 posit...
W3FPR replied to KH6AT that gated noise blankers cannot be expecte
FYI Ron, there is a group called "HF Pack" that is very strong in Pedestrian
mobile operation. both CW and SSB. Their various calling frequencies are
listed athttp://www.hfpack.com/ Most of the members seem to be on SSB with
their 817's (ugh) However, they do have an interesting web si
Just worked Ron around 14.061. 539 signal into N. Alabama, with QSB.
I admire Ron's persistence at doing this monthly for almost 4 years!
73,
Randy, KS4L
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Ron Polityka
> Sent: Saturday, January 01, 2
Can you tell if it is coming in from outside, or generated internally?
73, Bob N6WG
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Hi
Just this week had an experience that confirms your findings.
Had a bad street lamp outside creating 30db over S9 noise across all bands.
The K2 was basically useless, with either combination of NB1 or NB2, Hi
or Lo threshold. Couldn't copy anything but noise.
Turned on my Kenwood TS940s and
G3RXQ, Stewart, apparently has the same problem with his KAT100 that I have.
I have just learned that the erratic display on 30 meters is to be ignored.
The tuner works fine and gets the SWR down to 1:1 on all bands. And yes,
my tuner is well grounded. I have just learned to live with th
Copied KPH here in the far north of ZL1 on 426kHz from 010725UTC until
about 010800UTC when he went into a deep QSB null, but popped up again
for short periods during the next half-hour.
During the KPH 'night of nights' last year I also copied them on 426.
As someone who was a marine R/O for 3
Bill W7KXB wrote:
Not a sound from them (KPH), on either 80 or 40, around 2200 hrs PT (0500z).
Maybe they broke it of and joined the festivities.
-
The skip must have got you, Bill. Too bad. K6KPH was working lists on 3545
with RD at the key at 0500. I worked them at
Wow! Great Mike! Be sure to send a reception report to Denice Stoops PO BOX
381, Bolinas, Ca. 94924-0381. I'll bet they post that one!
Yeah, it's sad how quiet 600 meters is. Here in North America it's largely
destined to become a mass of correction beacons for GPS, providing short
range signals
Ron wrote :
>...the "600 Meter Research Group" that held, for a
>tantalizing-short time, transmitting licenses to work on
>several old maritime frequencies around 500 kc/s. But
>the US Coast Guard objected on principle and our
>privileges were cut short for now even though there was
>no record of
Hi Tom!
I confirm your birdie on 28020.
I have a birdie at 28019,27 cw and cwr falling slightly during warmup.
Since I know that you have a K2/100 and none of the others that answered you
I can confirm that the birdie is from KPA100.
If you turn power down to 10watts or less the birdie goes away
No birdy on 28.020 here.
Happy New Year All.
Doug,
W6JD
- Original Message -
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>;
Sent: Saturday, January 01, 2005 3:26 AM
Subject: Re: [Elecraft] Birdy on 28020 with K2?
> I monitor 28.020 for long periods with my K2 for a VHF beacon on 7
Hi to All
I also have a birdie around 28000 and it does not come from the outside.
Switching to antenna 2 changes nothing. I believe it's a harmonic of 4 MHz.
Laurie, VE1AWJ
- Original Message -
From: "Tom Arntzen" <[EMAIL PROTECTED]>
To: ; "Tom Althoff" <[EMAIL PROTECTED]>
Sent: Satu
True, you can (or could) still hear CW on the maritime bands since not all
countries switched over at the same time. The change actually started years
ago. There were a number of large ships sailing without Radio Officers in
the early 90's during Gulf War I (the last time I worked on shipboard
syst
Hi all,
I also have the birdie at 28018.46. It definatally comes from the KAT100
because when I turn the power to the low position it goes away.
Lou - W6UR
K2/100 #3578
- Original Message -
From: "Tom Arntzen" <[EMAIL PROTECTED]>
To: ; "Tom Althoff" <[EMAIL PROTECTED]>
Sent: Saturday,
Definitely internal. I'm going to try to tweak the crystal osc in the
KPA-100. The procedure called for setting it above 4.000 but I may drop it
down to 3.999 and keep it below 28.000.
I suspect that will take care of the problem.
73 de Tom K2TA
- Original Message -
From: "Bob Tellefs
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Tom Arntzen
I have a birdie at 28019,27 cw and cwr falling slightly during warmup.
Since I know that you have a K2/100 and none of the others that answered you
I can confirm that the birdie is from KPA100.
Sorry to state I did not do well with Randy. Heard a couple stations working
him on 20m only. Better luck next time.
Carry on
Bill_Harris
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Subscr
W3FPR added:
W3FPR replied to KH6AT that gated noise blankers cannot be expected
to work when the noise pulse is insufficient to reach the gating threshold
& that more signal might improve performance when blanking weak
noise. Sounds reasonable, but...
I believe my other radios have gated nois
On Sun, 2 Jan 2005, VR2BrettGraham wrote:
My impression is that whenever there is mention of the KNB2, there are
more posts about its ineffectiveness than anything else, as is the case
with this current thread.
Er, I think people who don't have any trouble with it have no
inclination to respon
And now a word from the designer ;)
The KNB2 was designed largely around noise found at my QTH in Belmont.
I have pretty horrendous line noise at some times of the year, as well
as the usual collection of noisy light dimmers, etc. (My family was
amused by my running around, turning lamps up an
I failed to mention that although I have the KPA100 it is in a
separate EC-2 enclosure and that might keep a lot of
spurious stuff out of the K2. I have never encountered anything
I could attribute to the KPA100.
Doug, W6JD
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Pos
<[EMAIL PROTECTED]> added:
Er, I think people who don't have any trouble with it have no
inclination to respond. While I don't think it's the best noise blanker
I've ever used, my K2 is unusuable at my urban location without it.
True - as well as folks who are fortunate not to need to use the
Happy new year to everyone !
Just in time for the new year's present, I finally got my K2/100 serial#
4618 finished last night. Started on 12/18 noon and put quite a few hours on
it during the last 2 weeks. Very gratifying experience, but missed my wife
and 2 babies somewhat and some hours of
*Hi folks -
In anticipation of beginning my next K2 I have been reviewing the
archives for the many, many posts on audio - so please forgive one more!
I've built two K2's and owned 3. The one I am building now will be my
3rd. The only thought I've ever had as a "negative" about K2's is the
aud
Good Evening All,
I hope your 2005 is starting off nicely. We are getting more snow but
it appears to be tapering off. The fir trees shed their load last night
approximately every 15 minutes. I did get some sleep but the whumping
noises did interrupt my slumbers.
I have gotten a few
On Sat, Jan 01, 2005 at 05:20:19PM -0800, Hisashi T Fujinaka wrote:
> On Sun, 2 Jan 2005, VR2BrettGraham wrote:
>
> >My impression is that whenever there is mention of the KNB2, there are
> >more posts about its ineffectiveness than anything else, as is the case
> >with this current thread.
>
> E
For what it's worth, with just one button press, my KNB2 will blank out
some pretty ugly pulse noise where I live that the blanker in my Ten-Tec
Orion only barely touches. Not bad for one dinky little board, in my
opinion.
73 all,
Bob WA4FOM
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