OH heavens, the idea to transmitting into a dead band for an hour would
most assuredly be considered a violation of FCC regulations. Yes, a dummy
load should always be used for any type of testing.
As to fans, they either BLOW or SUCK, your choice. A fan with blades
performs better sucking
I agree with you Jim. For years I've operated digital modes with a direct
connection between the IN's and OUT's of the sound card to the radio. Using
the VOX to control the T/R sequence {and any radio worth it's salt has a
good VOX, although many don't} does the trick nicely.
Now, if you end up
I agree with Tom on this. My simple solution is a length of wire, center
fed with light weight TV 300 ohm line which is terminated into a 1:1 current
balun at the radio. Put it up in any fashion, any height and enjoy
everything from 160M - 6M as long as the internal tuner will handle the
Here's the link:
http://www.60meters.net/
And here's the frequenices.
Channel Nominal Tuning Frequency (carrier)
1 5332kHz 5330.5kHz
2 5348kHz 5346.5kHz
3 5368kHz 5366.5kHz
4 5373kHz 5371.5kHz
5 5405kHz 5403.5kHz
Largely the issue of RFI can be more related to antenna location and the
radio/computer location. The closer the two are the more problems are
likely to arise. The signal strength at a specific location is defined by
the inverse square law. Double the distance and the RF field decreases by a
I too have been very successful using the Mastr II or Motorola MICOR
speakers on any HF rig. These speakers can be found at hamfest in very good
condition for $5.00 or so.They are physically tough and are excellent
communications speakers. Typically they will make any HF radio sound
I agree with Gary on this. There's lots of bad sounding signals on the
bands today. And there's a few good sounding ones too. Most of the bad
sounding ones are the result of improperly adjusted radios and associated
equipment coupled with poor mike technique. As to the good sounding ones,
I've found many a discussion where one has a 100 watt radio that only puts
out 90 watts according to their meter an they are mighty unhappy about it.
Hence, they push the critter trying to get 100 watts out of the box or
worse, tweak the radio until the meter reads 100 watts, never giving a
Any switching supply today and one that's worth it's salt should operate
satisfactorily from 100 VAC to 250 VAC. So 120 VAC or 230VAC should not be
of conern.
73
Bob, K4TAX
- Original Message -
From: Don Wilhelm w3...@embarqmail.com
To: David Ferrington, M0XDF
I AGREE!
If I can't have a radio that does not rely on some external computer of
various questionable hardware integrity, some other company's flaky
operating system and all put together by a 3rd party vendor..I
won't buy that radio.
A fully stand-a-lone radio is highly preferred.
was to ship that part (or an extra) ahead when traveling, and
when I asked was told that currently it takes about 15 minutes to
install, but that time might be cut.
73, doug
From: Bob McGraw - K4TAX rmcg...@blomand.net
Date: Sun, 18 Apr 2010 16:24:43 -0500
Any switching supply today
To Tom, Bill and all:
I never said anything about a direct strike. Don't bother trying to
protect for a direct strike. Nothing will survive a direct strike.
The problem is two ground points, separated by some distance of earth be it
5 ft, 50 ft or 500 ft. During a nearby strike the energy
...@audiosystemsgroup.com
To: Elecraft List elecraft@mailman.qth.net
Sent: Monday, April 19, 2010 7:49 PM
Subject: Re: [Elecraft] Grounding negative side of power supply?
On Mon, 19 Apr 2010 19:36:29 -0500, Bob McGraw - K4TAX wrote:
Now, with the radio connected between the receiving
antenna and the AC
I seem to recall the one I have at the shop is powered and has 12 USB ports.
Don't recall the brand or model but it works nice between multiple printers,
scanners and external HD units.
73
Bob, K4TAX
- Original Message -
From: Peter Chamalian w...@arrl.net
To: k2...@kanafi.org;
The Elecraft K-3 is far superior to the Pro III in just about every respect.
In the Receiver Test Data report from Sherwood Engineering, looking at 2KHz
overload data for the receiver, the K-3 is #1 and the Pro III is some 20 to
30 units down the list with just about every radio on the market
Let's see..the Corsair II was reviewed in 1986 and sold new for $350.00.
So I guess what we're saying is that receiver technology/performance has not
changed much if any in some 20 years. As to whistles and bells..radios
are loaded today with them and the 756 Pro III is an example.
I too agree with Jim on this point. Myself, being a retired pro audio guy
and used lots of microphones and EQ's and processors, I've not seen the need
for EQ on any current production or model ham radios. Take something made
back in the 50's or 60's or 70's and they likley could stand some
One of the things we often fail to implement is the transmit bandwidth
being adjusted much like the receiving bandwidth on the other end. In a
contest situation likely the receiving station is using a 1500 to 1800 Hz
receiver bandwidth with likely band pass tuning such that the lower
I seem to recall that several companies make bias T devices that allow RF
to pass but block DC in one direction. Thus these are suitable for feeding
DC to a antenna mounted preamp. Then the challenge of switching the preamp
out of line for transmit is next.
For my EME applications I have
More likely the low level distortion created in the analog audio path
typically occurring with the stronger signals. That distortion is therefore
multiples of the fundamental and the human hearing will allow the higher
frequency components to be dominate, often described as masking effect thus
There is one radio on the market that I am aware of that uses UCW and LCW
thus with the press of a button you have either of your choices. Your
preference doesn't seem at all strange to me. The software that I use to
control the radio offeres UCW and LCW modes.
73
Bob, K4TAX
-
No problem here with the radios or the logging software or the remote
control software. At least there is a choice.
73
Bob, K4TAX
- Original Message -
From: Don Wilhelm w3...@embarqmail.com
To: Bob McGraw - K4TAX rmcg...@blomand.net
Cc: Rich - K1HTV k1...@comcast.net; supp
New to the Reflector and new to Elecraft with a K3S on order, what is
suggested for a microphone. Objective is excellent audio with little
interest in contesting. My thoughts and suggestion from another source
is the Heli PR871.
--
73 Bob, K4TAX
no
need to spend cubic dollars on microphones.
73, Mike NF4L
On Jul 5, 2015, at 7:59 AM, Bob McGraw - K4TAX
rmcg...@blomand.net mailto:rmcg...@blomand.net wrote:
New to the Reflector and new to Elecraft with a K3S on order,
what is suggested for a microphone
While I don't have my new K3S radio yet, I did print the Owners Manual.
It shows the MIC audio connection to be pin #1 as MIC audio, pin #7 as
GRD, and pin #8 as GRD. My question, are pins #7 #8 the same or is
one analog ground and one chassis. ground. If so, which is analog ground
and
of pins 5 and 6), most folks treat pin 7 as mic return and pin 8 as
shell/ground/chassis.
73,
... Joe, W4TV
On 2015-07-06 4:20 PM, Bob McGraw - K4TAX wrote:
While I don't have my new K3S radio yet, I did print the Owners Manual.
It shows the MIC audio connection to be pin #1 as MIC audio, pin
OK thanks. Got the info I needed.
73 Bob, K4TAX
On 7/6/2015 4:50 PM, ke9uw wrote:
As best I can tell from the schematics, 7 and 8 are connected together.
However I use 7 as mic ground and 8 as the shell, like Kenwood.
-
Chuck, KE9UW
--
View this message in context:
In this regard and while waiting on my new K3S to arrive, I've read the
manual several times. These discussions then raise the question, is
there no Master Reset that returns the radio to factory default
values? I may have overlooked this. However the product not having a
Master Reset I
Having had a recent loss of radio equipment along with other items, I
would comment, the insurance company strongly and aggressively pushed
for a settlement under the loss definition of power surge. In this
case they would only pay depreciated value for the equipment less the
deductible
Thanks Lyle. I do have the K3Utility on the computer and will do just
that..first thing.
As I stated to another person letting me know of the procedure as listed
in the manual, coming from other brands of radios that do offer a
Master Reset I am finding the nomenclature and
. Elecraft calls
it parameter initialization.
I sincerely hope you find the K3S more acceptable after you receive it
than you have while you've waited.
73,
Scott N9AA
On 8/8/15 2:54 PM, Bob McGraw - K4TAX wrote:
In this regard and while waiting on my new K3S to arrive, I've read
the manual
The Squelch level I am referencing is on the FLDIGI screen and not on
the radio.
73
Bob, K4TAX
K3S s/n 10,163
On 8/19/2015 3:08 PM, Bob McGraw - K4TAX wrote:
I suspect that Squelch is either turned on and if so the threshold is
too high. I normally run with squelch on but the threshold set
A comment here, has anyone thought to use a Bird 43P with a 100 watt HF
slug? Or maybe a TelePost LP-100a? Both are equally good regarding
power measurements but only when the load is 50 ohms resistive.
73
Bob, K4TAX
K3S s/n 10,163
On 8/21/2015 8:15 PM, Don Wilhelm wrote:
In a slightly
.
Jer, AE4PB
K3S TBA
On August 21, 2015 at 9:20 PM Bob McGraw - K4TAX
rmcg...@blomand.net wrote:
Malcolm brings up a very good point. All connections should be fitted
with a proper lug which is crimped with a proper tool, depending on
wire
size and the terminal to which it will be attached
Malcolm brings up a very good point. All connections should be fitted
with a proper lug which is crimped with a proper tool, depending on wire
size and the terminal to which it will be attached, AND all terminals
should be soldered.I make no exceptions to this practice.The
crimp
Seems that I somewhat stirred the pot on this topic with my suggestion
of using a Bird 43P or LP-100a.In this regard with a Bird 43
instrument, proper choice of a slug is necessary. Thus if one wishes to
measure 10 watts or so then a slug of the proper full scale range, both
in power and
The K3S has a RJ-45 connector for the RS-232 communications. Now that's
different! Of course they supply a cable with a RJ-45 on one end and a
DB-9F on the other. And then to keep everybody happy, there is what
appears to be a 15 pin VGA connector that is the ACC connector to
provide band
Standard use of connectors is a good thing. It saves the various number
of different connectors that we must retain for various uses. However,
there is no standards in the ham radio community regarding the use and
types of connectors.
In the military, they use a different connector for
If there is a connection which is heating that much, one has more issues
than molten solder to be resolved.
73
Bob, K4TAX
K3S s/n 10,163
On 8/23/2015 12:37 PM, bs usb wrote:
Kenneth Talbott wrote:
Never solder PSU connectors - overcurrent can heat the joint and drop
molten
solder where you
This seems to have things really screwed up. Yes, the Bird 43 is a 5%
of F.S. accuracy instrument. The Bird 43P is somewhat less accurate,
although 5% F S with carrier, and more like 8% F S or so in peak mode.
In measuring a 100 watt radio with a 100 watt F S slug would seem to
be
For those that might have a more or less interest in various
products.
Why not a K3/K3S reflector?
Why not a P3 reflector?
Why not a KX3 reflector?
Why not a K2 reflector?
and so on.
At least put the model in the subject line. That way I can eliminate
automatically the not
calibration --is-- compressed to the right of center,
--not-- to the left as you state, making the left portion expanded
and easier to read.
73!
Ken - K0PP
On Sun, Aug 23, 2015 at 2:14 PM, Bob McGraw - K4TAX
rmcg...@blomand.net mailto:rmcg...@blomand.net wrote:
This seems to have things really
I placed my order for a K3S-F on July 2. Based on information, and in
speaking with Elecraft yesterday, I'm still 2 to 3 weeks out for the
K3S-F. I'm hoping the week of August 17 will have a delivery at my door.
73 Bob, K4TAX
On 7/28/2015 7:39 PM, Mark wrote:
According to the web site,
This may be worth investigation pertaining to the K3S USB application.
https://www.youtube.com/watch?v=guH0NMRRTAowidehd=1
It affects audio through USB when running digital modes.
73
Bob, K4TAX
__
Elecraft mailing list
Home:
To me it looks like the normal oxidation process that occurs due to
reaction between silver plating on the connector and oxygen in the air.
The dark color is silver oxide. {Some of you chemists can better
explain this effect.}
73 Bob, K4TAX
On 8/2/2015 12:06 AM, Wes (N7WS) wrote:
If you
On 10M {28 MHz} a 0.5 PPM can have +/-14 Hz error while a 5 PPM can have
a +/- 140 Hz error. It is the frequency in MHz x the PPM which is
Parts Per Million.
My article scheduled for publication in September QST discusses the
frequency read out of today's radios and their likely inaccuracy.
Here's my basic configuration which is on order at present:
Item Ref. Price ea. Qty. Description
K3S/100-F $2899.951 K3S 100W Xcvr. (Assembled)
KAT3A-F $369.95 1 K3S ATU (Fact. Installed)
KFL3A-1.8K $139.95 1 K3 1.8 kHz, 8 pole filter
KFL3A-500 $89.95
I use one of my 100 watt radios in our travel trailer. I did run three
lengths of #10 AWG automotive primary cable from the battery area to my
operating position. Both the DC negative and DC positive lines each
have a 30A Fast Blow fuse located very close to the battery. That third
wire is
To me the audio enhancement for the K3S is expected to be a nice
improvement. Historically some have expressed previous concerns
regarding K3 audio quality, stating it was noted to be fatiguing. I
had available at my disposal a K3/10 and later a K3/100 the result of
being asked to assemble
I tend to agree with Brian.
However, in my world, true diversity is attained from 2 identical
receivers, each having a separate antenna in two different locations.
The source signal is a single transmitter. The output of each receiver
is fed to a circuit that determined the best
I suspect this is/was a MCW generated signal with a bit too much drive
applied. Thus over drive of any audio stage such as may occur when
feeding the computer output or sound card output to the microphone
input. In this configuration it is very easy to overdrive the first
stage, which
With all of the recent discussions related to firmware, I'm wondering
what will be loaded in the new K3S that I have on order. And more
importantly, how stable will it be.
I already serve as a beta test person for another company. I'm really
not interesting in taking on another science
Here's a response from a friend that is way more knowledgeable about
computer stuff than myself.
Pertaining to Windows 10 :
In the instances of the Rascal I was using for RTTY (Buxcomm) the old
prolific USB to RS232 converters did not work and they are now in the
junk box. I bought two new
From my chart on the wall, at 50 ohms, 4 mV is about -34.8 dBm and
50 uV is -73 dBm. Thus you will need an attenuator supplying some ~35
dB of loss.
From your numbers and starting at 40 mv {-14.8 dBm}, using 3
attenuators of 20 dB each will get close.As someone else suggested
the XG3
I have found the program offered by ARRL is one of the best.
73 Bob, K4TAX
On 8/7/2015 10:13 AM, ae...@carolinaheli.com wrote:
I'm wondering with such a large investment in gear if anyone has special
insurance just for their station? I'm pretty OCD about disconnecting my
station when not in
Yes and remember, ALL lightning protection efforts and methods must be
outside of the house or structure for safety reasons. PolyPhaser
systems are noted to be excellent in this regard. And second, the
ground system provided for your station must be bonded back to the AC
Main ground.
For those that choose to use acronyms in their writing or communication,
it is usually deemed proper to identify the details or translation at
the first use of the acronym in any piece. The acronym will then be
most likely understood during the reading of the remainder of the piece.
After
PM, Jim Brown wrote:
On Tue,8/4/2015 2:40 PM, Bob McGraw - K4TAX wrote:
With all of the recent discussions related to firmware, I'm wondering
what will be loaded in the new K3S that I have on order. And more
importantly, how stable will it be.
I already serve as a beta test person for another
Several have inquired of me by e-mail and other means asking; when do
you expect your new radio?.
In speaking with Elecraft this morning, the order was placed on July 2
for a K3S-F and accessories, they indicate the radio is in assembly and
should ship in the next 2 to 3 days, 5 days at the
Bob makes a good point. Not knowing the specific facts surrounding the
Orion II repair required, I believe it improper to comment or draw any
conclusion on the topic from any perspective.
Although as an owner and user of an Orion II, Omni VII, Eagle and
Argonaut VI and one that has repaired
Oh but Rob does.See the notes at the bottom of the page for his
Receiver Test Data. These reference p and q. These identify the
filters used. Elecraft states what are optional vs. standard filters.
*/p/* with 200 Hz 5-pole filter
/*q*/ with 400 Hz 8-pole filter
73 Bob, K4TAX
One can download the Sherwood list and save it to an EXCEL file. Then
sort it by your own choosing. The Sherwood list is presented on one
parameter only being dynamic range, narrow spaced. There's multiple
other parameters that make for a fine receiver.
73 Bob, K4TAX
On 7/25/2015 3:20 PM,
I personally use a hard sided travel case fitted with die cut foam to
accommodate the various pieces of equipment...radio, power supply,
mike, wire antenna, coax cable, and etc. There's a few dedicated cables
and such wired into the travel trailer to assist with getting coax outside.
Be
Correct. JT-65 has common frequencies on each band. Then JT-9 is about
2 kHz higher from JT-65, thus the move in frequency. There is a box to
be checked on the application when changing from JT-65 to JT-9. It is
best if the radio is under CAT control. Most issues in this regard are
One of the better sources of information and portable antennas is found
at http://www.dj0ip.de/antennas/ http://www.dj0ip.de/antennas/
Rick has some extensive test results on baluns and portable antennas on
his website. His OFCD antenna is an ideal back packing antenna covering
most all
While waiting the arrival of my K3S, the question arises for the
requirement for a Windows driver for USB connecton. Is there something
special required for Windows 7 Pro 64 bit system? I didn't see anything
in the Owners Manual, but I could have missed it too.
Also, is anyone aware of
While your test using a dummy load seem reasonable and correct, it would
appear as though you may have an excessive amount of Common Mode current
on the feed line, not being seen by the SWR indication in the radio. I
suggest a Common Mode choke on and at the output of the radio. Perhaps
a
For those wanting info on mobile installations, here is a website that
has plenty of very good information. Some can be adapted for apartment,
condo and other types of dwellings.
http://www.k0bg.com/
73 Bob, K4TAX
On 7/20/2015 2:50 PM, Tony Estep wrote:
I'm getting a package of info
I've noticed with my K3S when operating with a SWR of greater than 2.5 :
1 the power output does take a dive downward. While I use an external
tuner, it would make sense to have and use the internal ATU in certain
applications.
While resonant antennas are best, I operate 160M and 80M and
Although I made my own applications, Bob Heil has a nice foot switch
that works as a "stomp to talk" switch. Also Granger has an assortment
of foot switches although the may a bit over kill for the application.
For my station, I made a pigtail using some small coax like RG-177 or
174, {can't
My experience is exactly as Don suggests. Proper order in doing this is
very important. My experience is the CMP value as displayed should not
exceed 10 on the meter scale. I normally run about 2 to 3 bars.And
yes listening to ones signal in TEST mode and using headphones does work
for
One point I've learned over the years is the fact baluns, regardless of
the ratio, are power rated at matched values. i.e. a 1:1 is typically a
50 ohm to 50 ohm while a 4:1 is nominally a 200 ohm to 50 ohm device.
And the power rating is mostly at closely matched values. Hence a 4:1
balun
You don't happen to have anything else in line between the power supply
and the K3 do you? I've found those DC distribution panels sold by
certain companies are contributors to significant voltage drop. Your
statement " With the radio connected directly to the PS. I am now
seeing 14.1 VDC
is in place between the radio and power supply
73
Bob, K4TAX
K3S s/n 10163
On 10/26/2015 2:37 PM, Bob McGraw - K4TAX wrote:
You don't happen to have anything else in line between the power
supply and the K3 do you? I've found those DC distribution panels
sold by certain companies
.)
73 Bill AE6JV
On 10/26/15 at 12:50 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:
On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote:
In fact, anything in line between the power supply and radio can
contribute to this. Even fuses, switches, power connectors and
such. Any connection
Seems to me the display on VFO B is accurate enough for this purpose.
Now to make sure of the accuracy along with voltage drop, measure the
voltage at the power supply terminals. I would expect the voltage at
the power supply terminals and the VFO B display in receive mode to be
identical,
An Astron SS-30M is a much better supply and will supply the required
current. It has excellent regulation and IS NOT a noise generator.
Plus it has a volt meter and amp meter on the front panel.
73
Bob, K4TAX
K3S s/n 10163
On 10/29/2015 6:51 AM, Peter Pauly wrote:
I'm looking at the
My suggestion and test is to measure the voltage between the Astron
power supply GRD terminal and the GRD terminal on the radio. Any value
over 0.5 volts, when in CW mode, key down at 100 watts is a situation
that should be investigated and improved.
73
Bob, K4TAX
K3S s/n 10163
On
I agree Jim. Many hams do not understand what IMD values mean and how
it affects other signals on the bands. To wit, the "on frequency"
signal is not affected, the IMD is not heard on frequency, so it is of
little concern to the operator as they are only concerned about getting
a big signal
Yes "some resistance" might be OK, however several meghoms is not.
This gets me to thinking, in ham radio models, wonder how many, which
ones, and such can withstand a 5KV to 10KV ESD discharge on any knob,
screw or connector and survive. That is one of the standards we had to
meet with
I looked at those units and saw no reference to any safety or emissions
certifications.
73
Bob, K4TAX
K3S sm 10163
On 10/29/2015 6:31 PM, Josh Fiden wrote:
MegaWatt seems to be implying with "Real USA," posting a copy of their
USA trademark registration, and warnings about Chinese copies,
Sorry about my mis-typing of POWER and POWDER... Dang, that's the
first keyboard error I've made since typing class in H.S. in 1960.
Yes conductive POWDER coating material is available, however it is more
expensive and more difficult to use.When I worked for the JA's ,
how well I
It is amazing how many times I've found this to exist and how many times
that I've written about this on various reflectors. The power coat
paint on the chassis makes for an excellent insulator.
If you have an Astron power supply and you have not checked to see that
third pin ground is
I do run a fair amount of PSK-31 and much enjoy the same. In that
regard I always run AGC-F. For selectivity, in dealing with strong
signals in the midst of weak signals, I shift the passband and tighten
the bandwidth as needed.RF gain is always adjusted based on band
noise such that
Back in 1923, in order to receive a signal, the following adjustments
must be made and possibly repeated to get the optimum performance (not a
simple matter and easily upset): The input coil (inside box) is adjusted
to resonate at the desired receiving frequency using the two tap
selectors on
While true, {although Jim and I rarely agree on anything} what is heard
via the MONitor is representative of those enhancements and adjustments
the operator can apply. In simple words, if it doesn't sound great
there via the MONitor, it certainly won't sound great after the TX SSB
roofing
I'm always reluctant to submit an item for publication. Even after many
reviews, by myself and others, there's likely to be errors found.
73
Bob, K4TAX
On 10/21/2015 11:55 AM, Jim Brown wrote:
On Wed,10/21/2015 9:16 AM, jim wrote:
In today's age, a simple "My Bad", while slapping your
I'd start with the anti-VOX value at 0. Then speaking normally with the
headset boom about 1" to 2" from your mouth, advance the VOX Gain until
you get reliable keying. Then advance the anti-VOX gain to about 10.
The purpose of the anti-VOX circuit is to prevent the received audio
coming
Per the manual the 538 Jupiter uses a floating audio output circuit for
the speaker. Therefore, one can not ground one side of the speaker line.
73
Bob, K4TAX
On 10/21/2015 10:00 AM, Carl Jón Denbow wrote:
Thanks, Frank. That's interesting because the shield is usually grounded. I
guess
Sure there is an available PTT just push XMIT on the radio.
73
Bob, K4TAX
On 10/21/2015 6:00 PM, Wes (N7WS) wrote:
I always use a headset but sometimes use both the headphones and
speaker if a guest is in the shack and needs to hear the other
station. Hence the need for anti-vox
Great explanationspecially for an old fellow {me}, trying to
learn to use an Iambic paddle.
73
Bob, K4TAX
K3S s/n 10163
On 10/21/2015 9:31 PM, Mike Morrow wrote:
nfortunately my keying is full of mistakes. When I send the letter C
>for example, it often comes out as CT or K. I
My take on this is baluns are baluns and common mode chokes are common
mode chokes. In many cases baluns do not provide adequate common mode
choking requirements. Thus both may be needed. Usually, the balun is
located physically at the load and the common mode choke is located at
the source.
Don is absolutely correct.
As many may know, I do assist hams with issues associated with many
different products here and elsewhere. The biggest issue I encounter is
the ham that says " well somebody told me to blah blah blah blah
..and it would work best". In many cases, nothing
I agree with Jim, K9YC. The internal systems are specific for the radio
and ham applications. The external devices usually cause more issues
than they actually resolve. If you believe you need external signal
processing, then you best examine other parts of the system to address
the
There are no bad radios currently on the market. Some are better
radios, but better is in the eyes {ears} of the beholder. However,
those radios of yesteryear, as compared to the current breed of radios
from Elecraft, Kenwood, Yaesu, ICOM, Flex and Tentec and ? are
really in the back
Start the computer first and let it completely boot. Then turn the
radio power supply on and then the radio. The computer will then
recognize the USB port and connect accordingly. When shutting down,
radio first, then radio power supply, then computer.
73
Bob, K4TAX
On 11/12/2015 11:24
Here is a site that provides free computer based spectrum displays. I
use Spectrum View in conjunction with the USB soundcard within the K3S.
It can be run in real time and you observe the changes that occur as the
various parameters of BW and Shift are utilized. Easy to use and best
of all,
Are we interested in the shape of the DSP filters inside the roofing
filters or are we interested in the performance of the receiver using
recovered audio?
I have done measurements using a broadband noise for the source and
measured spectrum of the recovered audio. Of course as the DSP BW is
Is the reference to the DSP filter system or the roofing filter system?
Since the reference is CW x Filters, as a misnomer, one would
presume the reference is actually to the roofing filters. Where as the
DSP filter system is stepped from 50 Hz, 100 Hz, 150 Hz and etc. as such.
73
Try it on a dummy load. If it changes then it is a radio problem. If it
doesn't then it's external.
If you have used the radio with CAT control, sometimes the software
application will not close and exit correctly and will leave "crud" or
fragmented data in the radio and there's no telling
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