In addition to the hard limiter Elecraft provided threshold and slope controls
in the AGC system.
On 9/3/2017 4:04 PM, Ron D'Eau Claire wrote:
The advantage of controlling the gain manually is not an "old wife's tale".
Rather, it's clearly just a technique that is not for everyone.
AGC will
..@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wes Stewart
> Sent: Sunday, September 3, 2017 3:00 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Noise Blankers
>
> Just a couple of points.
>
> In the K3(S) there is no "RF Gain&
n.qth.net] On Behalf Of Wes Stewart
Sent: Sunday, September 3, 2017 3:00 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Noise Blankers
Just a couple of points.
In the K3(S) there is no "RF Gain" control unless by RF gain you mean "It's not
the audio gain gain contro
On 03/09/17 20:38, Wes Stewart wrote:
> The K3S blanker is slightly better than
> useless. When I set it aggressive enough to be audibly useful, FT8
> decodes multiple signals at 120 Hz intervals, which upsets sequencing.
That's an inevitable consequence of how a noise blanker works.
It removes
Just a couple of points.
In the K3(S) there is no "RF Gain" control unless by RF gain you mean "It's not
the audio gain gain control."
The "RF" gain control operates on the i-f amplifier, which is after the analog
noise blanker. In this regard, it is little different from AGC, which operates
Depending the type of noise, for repetitive pulse type noise only, the
Noise Blanker does it job. Now one must understand that all pulse noise
is not alike. Therefore, different values of NB, both with the IF
values and with DSP values, will require some adjustments. If the
noise is not
In my experience, NR is much better than NB against power line noise.
However, NR does not work on DATA mode. I use BHI Compact In-line DSP Noise
Eliminating Module, which is inserted between K3 line out and USB audio module.
For effectively eliminating noise, tuning RF gain and AGC level in
I agree. The adjustments are far too many and arcane. I'm currently plagued
with powerline noise that has yet to be fixed, although they are supposed to be
working on it. The K3S blanker is slightly better than useless. When I set it
aggressive enough to be audibly useful, FT8 decodes multiple
I find the K3 NB to be surprisingly effective. I also find that
adjustment is highly dependent on the characteristics of the signal and
the noise, and the effects of changing those adjustments is subtle. The
effect of a blanker on ignition noise was really astounding ... "was,"
because
On 9/3/2017 9:18 AM, K9MA wrote:
I have never found the K3 noise blanker to be effective.
BTW, the K3 noise blanker uses a filter with a bandwidth of about 100 kHz.
The K3 NB is really TWO blankers, operating in two different IFs. Each
can be tweaked for various kinds of noise from the
I have never found the K3 noise blanker to be effective. On the other hand, in
side-by-side comparisons, the noise blanker in my old FT-1000D can be very
effective on my ever present power line noise. However, like all noise
blankers of that design, it only works if there are no strong
Radio Amateur N5GE wrote:
On Thu, 7 Jan 2010 11:34:50 -0800 (PST), Wes Stewart n...@yahoo.com
wrote:
One of the tricks pulled on new
guys was a customer or another salesman asking for a set of spark plugs
for a Cummins, a radiator cap for a Corvair or an oil pan gasket for a
Powerglide
I worked in a TV factory, 1968. We sent the new guys to the supply window
for a raster stretcher.
Steve
N4LQ
n...@carolina.rr.com
- Original Message -
From: gdaug...@stanford.edu
To: elecraft@mailman.qth.net
Sent: Friday, January 08, 2010 1:06 AM
Subject: Re: [Elecraft] Noise Blankers
On Fri, 08 Jan 2010 08:23:01 -0500, Mike n...@nf4l.com wrote:
[snip]
Y'all didn't use flight line to tie that bucket under the nacelle?
73, Mike NF4L
Yes, but we did that before the prop wash trick. When we sent them
for prop wash we sent them to the flight line, the location of which
Early days of TV Broadcasting we sent new projectionists to the competition
to get a box of sprocket holes - they always came back with them!
But when we sent them for a camera cable stretcher (does exist) they
wouldn't go.
George
AI4VZ
Hi all,
All of which don't exist.
And in the
Tom,
I find the noise blanker on the K3 to be extremely good. I have been plagued
with power line noise for years at my QTH, and the K3 is the first rig I've
owned that can knock it out. It takes a bit of tweaking, and for reasons I
don't understand the power line noise on Tuesday night
, but I have
not tried it at my QTH.
Dave K1WHS
- Original Message -
From: Tom Bickley k...@hotmail.com
To: elecraft@mailman.qth.net
Sent: Thursday, January 07, 2010 1:38 AM
Subject: [Elecraft] Noise Blankers
I'm overdue for a new radio (at least, that's what I am telling my
XYL
A six cylinder diesel doesn't have ignition noise. What noise are you
comparing against? 73, Guy.
On Wed, Jan 6, 2010 at 11:38 PM, rfenab...@gmail.com wrote:
To be honest I have not found any noise the NB would not get rid of.
Having said that, I have a 6 cylinder diesel that does give my
A diesel fuel injection pump/system makes all kinds of electrical
noise. There is no electrical ignition system in a diesel engine.
73,
matt, W6NIA
On Thu, 07 Jan 2010 12:47:52 -0500, you wrote:
A six cylinder diesel doesn't have ignition noise. What noise are you
comparing against? 73, Guy.
On Thu, 7 Jan 2010 12:47:52 -0500, Guy Olinger K2AV
olin...@bellsouth.net wrote:
A six cylinder diesel doesn't have ignition noise. What noise are you
comparing against? 73, Guy.
Having said that, I have a 6 cylinder diesel that does give my TS-480SAT
some measure of grief.
[snip]
Guy
--- On Thu, 1/7/10, Guy Olinger K2AV olin...@bellsouth.net wrote:
A six cylinder diesel doesn't have
ignition noise.
Actually,
some old International Harvester diesels did have spark plugs. They
started on gasoline and after they warmed up, the operator switched
them over to diesel :-)
On Thu, 7 Jan 2010 11:34:50 -0800 (PST), Wes Stewart n...@yahoo.com
wrote:
One of the tricks pulled on new
guys was a customer or another salesman asking for a set of spark plugs
for a Cummins, a radiator cap for a Corvair or an oil pan gasket for a
Powerglide transmission.
All of which don't
Hi all,
All of which don't exist.
And in the aircraft mechanic trade we sent them out to get a bucket of
prop wash ;o)
And in the electronics trade (tube days) we sent them out to get a drip pan for
grid
leak resistors.
73,
George T Daughters, K6GT
CU in the California QSO Party (CQP)
I'm overdue for a new radio (at least, that's what I am telling my
XYL). In considering the purchase, unfortunately one of the major
considerations I must take into account is
the noise blanker function. I have recently moved to an area with A LOT
of power line noise. I have high voltage lines
Hi Tom,
You'll get a lot of opinions on noise blankers, I suspect :)
Here's my 2 cents: The K3's combination of two noise blankers -- one
at the 1st IF and one at the DSP -- can work wonders on all sorts of
noise. But it's especially good with power-line noise (loads of that
at my QTH).
The K3 blankers have a considerable range of adjustability of both the
blanking threshold with seven steps, and the blanking pulse width with
three steps, with independent settings for hardware blanking and dsp
blanking. Hopefully, you can find a setting that will work without
excess
Hi Tom,
Well, I have a K3 noise blanker story for you.
About two months ago, I suddenly had an S9+20 line noise problem
around here. I knew it was some type of failed Edison equipment, or
maybe something at a residence. It was loud enough to hear with a
stubby for ANT1, and on 80m through 30m
Tom,
I'm a new K3 owner, coming from an ICOM PRO II, and still learning how
to use the K3. I live with a pretty constant S9 or better noise level. I
think most of it is power line.
Whatever it is, the NB on the K3 knocks the cover off the ICOM.
73, Mike NF4L
Tom Bickley wrote:
I'm overdue
To be honest I have not found any noise the NB would not get rid of.
Having said that, I have a 6 cylinder diesel that does give my TS-480SAT some
measure of grief.
Just for my own knowledge I hooked the K3 to the same power lead fitted with
Anderson plugs as with all my power leads, and, the
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