Mode is not equivalent to emission type,
Phone is not a mode.
Phone is not an emission type.
Content is what the emission contains or what
is carried by the emission.
Content can often be part of the emission type,
but not always.
Sub-bands are demarcated primarily by content,
not
KH6TY kh...@... wrote:
Paul, it works, at least in part, because the huge
numbers of US amateurs in proportion across the
border are regulated both by mode and by bandwidth.
Hi Skip,
Perhaps you may want to re-phase that?
USA ham sub-bands are regulated by content
rather than
Generally speaking, USA's FCC rules for ham digital technology are sadly
antiquated, and many common digital methods could fall into gray areas of the
rules, or prohibited areas of the rules depending upon how the rules are
interpreted or how the method is described. Overly-complex and
Dear Jose,
It is very simple:
1. You are the designer of ROS, and you say ROS is Spread Spectrum.
2. FCC says 'The ROS designer says ROS is Spread Spectrum' so we believe this
is true.
3. Spread Spectrum is not allowed below 222MHz for USA hams by FCC Rules.
4. Hams in USA must follow FCC
Jose wrote:
if anywant know about ROS protocol is Jose Alberto Nieto Ros
Hi Jose,
Do you plan to publish documentation of a non-Spread Spectrum version of ROS
mode?
Examples of public documentation:
http://www.arrl.org/FandES/field/regulations/techchar/
Best Wishes,
Bonnie Crystal KQ6XA
As I previously predicted, an FCC agent has
interpreted FCC Rules, saying ROS is Spread Spectrum.
ARRL staff have also done the same.
In the FCC response to an inquiry
initiated by Timothy J. Lilley - N3TL,
The FCC Agent 3820 stated this:
ROS is viewed as spread spectrum, and the creator
Dear Rik van Riel,
There is currently no finite bandwidth limit
on HF data/text emission in USA ham bands,
except for the sub-band and band edges.
FCC data/text HF rules are still mainly based
on content of the digital emission, not bandwidth.
FCC rules allow hams to transmit a 149kHz
Given the fact that ROS Modem has been advertised as Frequency Hopping Spread
Spectrum (FHSS), it may be quite difficult for USA amateur radio operators to
obtain a positive interpretation of rules by FCC to allow use of ROS on HF
without some type of experimental license or waiver. Otherwise,
The point I was trying to make previously, is:
Especially for Emcomm teams that need to fly,
boat, or walk into a disaster zone... or simply
find themselves in one due to being at the wrong
place at the right time...
It is so much better to have as few external devices
and cabling attached
Russell Blair (NC5O) wrote:
ALE and Winmor and software for a PC, and power
to run all this. but the phone nets maybe slow
but all you need is a radio.
Hi Russell,
ALE does not need a computer for sending email or
calling other stations. There are many radios with
built in ALE.
--- In digitalradio@yahoogroups.com, w2xj w...@... wrote:
I truly believe it will be back to the
very basics. DHS seems to feel the same way based on the
money being spent on deployable HF SSB systems.
Hi W2XJ,
All the DHS radios have ALE.
Bonnie KQ6XA
MT63-1000 can be used on any HF band and on 160 meters.
There is no bandwidth limit for Data for USA hams on HF.
MT63=1000 also complies with the 300 symbol per second rule.
73 Bonnie KQ6XA
Kim W4OSS wrote:
For US amateurs can MT63-1000 be used below 28MHZ or only above.
Global ALE High Frequency Network (HFN) is now
on ALERT for Haiti earthquake Emergency / Disaster
Relief Communications (EMCOMM)
more information:
http://hflink.net
HFLINK SPECIAL BULLETIN 13 JAN 2010
Alert: Haiti Earthquake EMCOMM
HFN Pilot Stations are active and ready 24/7
for ALE
RS ID is wonderful... for calling CQ with most
digital text/data modes.
But remember to turn it off when using ALE.
I've noticed several stations trying to link
with RS ID on, and it fails most of the time
because it interferes with the handshake.
73 Bonnie VR2/KQ6XA
Hi George,
http://hflink.com/olivia
The most common flavor of Olivia is 500/16
and for DXing, you can find it on one of the
following USB VFO Dial frequencies:
7042.5 USB
7072.5 USB
10142.5 USB
14075.65 USB
14074.65 USB
14077.65 USB
18102.65 USB
When Olivia first began, the 1000/32 flavor
was
Hi Warren,
When Olivia first became somewhat popular, it
was mode of the month... there was a lot of
experimentation with tones and bandwidths.
Operators found advantages for various conditions
and needs, with extremes of each flavor.
The 2000/64 is quite good for interference
rejection.
Andy K3UK wrote:
Looks like the minds of many have not met despite
15 years to solve the matter.
The minds met in 2001-2002. They developed specific
programming and an ALE protocol baseline for what is
now known as Ham Friendly ALE.
The method is successful and has proven itself
with
All contesters and DX pileup participants
should use busy detectors! This is quite
evident since it has been proven that such
types of operation are the source of 99% of
harmful interference and intentional interference
on the HF ham bands. Manual methods of busy
detection have been proven
There are anti-automatic and negative-hams who
would like to hold digital ham radio back in the
same tired olde structure of brass pounding nets
and CQ random contacts and bulletin boards of
the 20th century.
But the facts of the matter are, that the old
nets based upon manual monitoring
Hi Sigi,
Yes, Echolink is a wonderful example of a
modern networked radio communication system.
Can you please tell me which HF frequencies
and modes in europe you use to ring up your
friend with echolink? How can you ring up your
friend day and night with it on HF? Does anyone
have a
Charles,
Your constant efforts to spread disinformation about ALE use in ham radio shows
how little you know about how hams are using ALE.
If you are really concerned about lids on HF, start with the #1 primary source
of QRM: contesters.
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com,
Skip KH6TY wrote:
A contester who calls CQ Contest is usually doing
it on a frequency that is clear at the moment
Hi Skip,
What planet do you live on? :)
I want to live there in that mythical land,
where all contesters get to transmit on
clear frequencies.
Don't get me wrong, I am not
I would also like the ALE and digital community to
recognise that they share the bands with everyone else
Dave (G0DJA)
Hi Dave,
While I can't speak for the whole digital community,
I can probably speak with some authority for
the ALE community...
ALE operators have been sharing the
http://hflink.com/bandplans/USA_BANDCHART.jpg
73 Bonnie VR2/KQ6XA
Andy obrien k3uka...@... wrote:
definitive source as to what those
sub-bands are. Anyone ?
Phil Williams ka1...@... wrote:
Who can talk about what they have seen when
it comes to best practices when
operating an unatteneded on the HF bands?
Hi Phil,
Unattended operation of ham stations isn't
appropriate to describe HF operating methods
in USA, as far as I am aware of it.
I'm glad there isn't any finite bandwidth limit
for HF digital data communications in USA's FCC rules.
(Other than the whole subband)
This leaves open the potential for some wonderful
new and different data modes to be developed in the
near future. Modes that have the potential to send a
Hi Bill,
In USA you can use it on every ham band,
MF, HF, VHF, UHF, etc.
Just be sure you are in the correct band
segment for image comms. And be sure your
transmission's content is image.
73 Bonnie VR2/KQ6XA
Bill WA7NWP wrote:
So what would be the lowest band we could use it on?
http://hflink.com/jt65/
JT65A HF Frequencies
VFO FREQ
- 28076.0 kHz USB
- 24920.0 kHz USB
- 21076.0 kHz USB
-
18102.0 kHz USB
* 14076.0 kHz USB
* 10139.0 kHz USB
- 7036.0 kHz USB
- 7039.0 kHz USB
- 7076.0 kHz USB
-
Weak Signal = Received signal strength levels that are close to or partially
embedded in the natural noise.
QRP = Reduce Transmitter Power
QRPp = Very Low Transmitter Power
73 Bonnie KQ6XA
Many moonbounce operators are running
1.5kW transmitters with more than 10kW ERP
(effective radiated power with antenna gain).
In that context, Weak Signal has traditionally
meant that the signal at the receive end
of the QSO is at or below the noise level.
It doesn't mean weak transmitter
Dave AA6YQ wrote:
Please identify the significant factors...
Hi Dave,
Some of the answers you seek are in a previous
message:
http://groups.yahoo.com/group/digitalradio/message/30581
I will leave the rest up to you to determine.
73 Bonnie KQ6XA
My rule of thumb for FSK is:
Bandwidth is greater than Shift.
On the surface, that may seem quite
simplistic :) But, the deeper one looks,
the more one finds that this is just about
as far as one can go in making a universal
statement of truth in the relationship between
bandwidth and shift
Dave AA6YQ wrote:
There is unquestionably a bandwidth restriction
on HF for frequency-shift keying,
Hi Dave,
Sorry, old friend, but you are incorrect.
In the USA data/RTTY bands 160meters-10meters,
the FSK rule is a shift restriction. It is
not a bandwidth restriction.
The attempt
Hi Andy,
There is no simple universal relationship between
the shift and the transmitted signal bandwidth,
because there are so many factors other than shift
that contribute to the bandwidth of an FSK signal:
1. Symbol rate
2. Shape of waveform
3. Symbol transition point
4. Filtering
5.
Dave, AA6YQ wrote:
Do you think its a good idea for amateurs to
transmit 150 Khz-wide signals on HF bands
like 20m that are 350 Khz wide?
Hi Dave,
Yes. There are certainly conditions now that
would be perfectly fine for 150kHz bandwidth
signals to be used at power levels that would
Dave AA6YQ wrote:
What's the bandwidth of an FSK signal whose
shift is 1 kHz and whose symbol rate is limited
to a maximum of 300 baud?
Hi Dave,
The question provides insufficient data to
derive a simple universal answer.
Bonnie KQ6XA
k2ncc asked:
...is it legal to transmit on the digital modes
sub-bands modes that are greater than 1000 wide,
like Olivia 2000?
Yes. Under the present content-based rules for
hams in USA, FCC has confirmed that there isn't
really a specific bandwidth limit for most types
of modern
I made a typo error in the previous message.
I should have said:
For example, on 20 meters, hams in USA can
legally transmit a 150kHz bandwidth data signal
(14000kHz to 14150kHz).
73 Bonnie KQ6XA
FCC Data Signal Bandwidth Limit Chart for HF/VHF/MF
BandData Signal Bandwidth Limit
160 meters = 200 kHz
80 meters = 100 kHz
60 meters = 0 kHz (Data Not Authorized)
40 meters = 125 kHz
30 meters = 50 kHz
20 meters = 150 kHz
17 meters = 42 kHz
15
Frank k2ncc wrote:
I think the confusion I have with quality phone
transmission comment is the part that says
...of the same modulation type.
Hi Frank,
The FCC rule about HF signal bandwidth limit
related to a phone emission of the same
modulation type, applies mainly to Image signals
The FCC recently posted on Order clarifying
what it believes a repeater is.
Due to the law of unintended consequences,
while this recent FCC order closes one
small perceived loophole for D-Star and
P-25 signals, it simultaneously (pun intended)
affirms something else... the existence of
an
7MHz IARU Region 1 Bandplan (effective 29 MAR 2009)
IARU Region 1 is Europe/Africa/Russia/MiddleEast.
More details: http://hflink.com/bandplans
===
FREQ kHz (BANDWIDTH) PREFERRED MODE AND USAGE
===
7000-7025 (200Hz) CW, contest preferred
Rick N6RK wrote
What are these comments based on? They are not
consistent with the April QST article. Do you
know something the ARRL doesn't know or isn't telling?
Hi Rick,
The April 2009 QST article by Brennan N4QX, is
good, and it provides a feel-good positive spin
back story on
Why is there a need in ham radio for mode wars?
Is it counterproductive to have so much negativity
and misinformation being spouted about various
digital modes and methods by those who profess
to be proponents of digital ham radio?
Why is it necessary for a person who advocates
some
Andy K3UK wrote:
Where all this leaves ALE, is another issue !
Just rambling, 73 de Andy K3UK
Hi Andy,
As the defacto global standard for initiating
and sustaining HF comms, ALE isn't affected
by ham radio digital flavor of the month :)
When linked, simply use whatever mode suits
your
Dave, AA6YQ wrote:
Anyone know how many amateur QSOs are typically
initiated each month?
Why not try it and see?
73 Bonnie KQ6XA
Hi Wolf,
Here is the Centre of Activity frequency list
we have been using for RFSM8000 and MIL-STD 188-110
testing, file transfer, auto, and some images:
VFO FREQ KHZ / MODE=USB
1806.0
1840.5
3584.5
3626.0
7040.5
7065.0
7100.0
10142.5
14101.0
14112.0
14233.0
18104.5
18111.0
21116.0
Since illinoisdigitalham group is now gone, there
has been quite a lot of discussion about it.
It seems that Mark's rise to power as a group owner
and especially, as a moderator, was rather sudden.
Many of the successful group owners and moderators
have developed their groups over many years,
Hi Wolf,
1806.0
--- In digitalradio@yahoogroups.com, Wolf, oe7ftj wolf.hoel...@...
wrote:
Hi all!
Are there CoA frequencies with RFSM8000 between individuals or
dedicated frequencies with automatic stations or servers or gates with
RFSM8000 modulation?
We have done some good tests
Anyone know what happened to illinoisdigitalham?
Bonnie KQ6XA
Howard K5HB
BTW, I was one of the stations experimenting
with Q25. So far it did not work very well.
So, tell me, Howard... when did you stop QRM'ing the net?
73 Bonnie KQ6XA
Respectfully, I'm just curious why you would want to run such an
experiment directly on top of an existing ham radio 24/7 global Emcomm
network at 14109 USB?
Bonnie KQ6XA
I've left my system on 14.109 USB running Q15X25 through
the soundmodem software.
Connect to VE4KLM please. I'll send
Hi Les,
It is 2009. Digital evolution moves on.
MT63 had a few good years of activity in the late 1990s. It was a
significant step in the evolution of digital texting modes. But, alas,
the popularity of MT63 on 14109 kHz USB subsided about 8 years ago.
This coincided with the increasing
Bonnie, amateur frequencies are shared.
We always listen before transmitting, don't you?
Howard K5HB
I don't have any idea why you would be asking me that question, Howard.
Bonnie KQ6XA
John VE5MU wrote:
To call a few operators using ALE soundings on
14109.0 a global Emcomm Network is a bit of a
stretch, We do share these frequencies
14109.0 is not busy to say the least.
Hi John,
Your observation about 14109 being not busy
is not supported by facts. It is probably
Howard K5HB wrote:
Bonnie, I asked because you don't seem to want to share the frequency.
Hi Howard,
Please explain.
I don't understand what you are talking about.
Bonnie KQ6XA
John VE5MU wrote:
I admire the dedication that you and your fellow
experimenters have with ALE, and the progress
you have made so far.
Hi John,
Thank you. However, ham radio ALE was past the
experimental stage about 7 years ago.
73 Bonnie KQ6XA
It is a fast HF modem.
Could be data/text transfer,
but the long transmissions are not typical
of ARQ data transfer.
Probably digital voice 2-way comms.
73 Bonnie KQ6XA
--- In digitalradio@yahoogroups.com, oz1...@... wrote:
I walked downwards and upwards in frequency (you can hear it on
Such devices have been used in music industry, especially vocals,
guitars, and other instruments.
They have been variously known as pitch shifters, pitch scalers, or
harmonizers. This function has become a feature in multi-effects
boxes for electronic music instruments, recording, and live sound
Hi Sholto,
It is not normal specifications to have 12dB tilt
(or more) within the passband of an SSB transmitter.
The engineer's response to your measured graph of
power vs passband frequency indicates that either
the engineer is BS'ing you, or the engineer is
unqualified to determine the
Hi Sholto,
I just read the FT-450 Transmitter Specifications:
Audio Response (SSB): Not more than -6dB from 400 to 2600Hz
In my view that is not a very impressive specification
to begin with :) But, be that as it may, your measured
graph of transmit power vs audio frequency indicates
about
Graham g0nbd wrote:
Q1 With ALE can 'I' send a message via a second station ...
eg send to g0abc via m0abc for example ...
Yes. If you link with one of the ALE HFN Pilot Stations,
you can relay a text message through it to any other station
that can be linked to the same HFN Pilot
Graham G0NBD wrote:
Well looks like its 'close' ..
Yes, there are 2 HFN Pilot Stations close
to your QTH, Graham:
F4BXW in France
SM0TSC in Sweden
You should be able to easily link with
one of them at any time of day or night.
Q .. Can any station be a relay station ?
If so how ?
Graham G0NBD wrote:
Follow on from last night , As the olivia system transmits
tones in parallel it requires a linear system,
however , MFSK is a single tone phase continuous system
Hi Graham,
Olivia mode does not transmit tones in parallel.
It transmits each tone one at a time,
The defacto standard for PSK31 frequency listing:
USB VFO dial freq kHz and audio centre freq Hz
Examples:
14070kHz USB + 1500Hz
14070 + 1500
The defacto standard for PSK31 is Upper Sideband
on all ham bands, so sideband is often not listed.
There are other wordy
Hi John,
Thanks very much, for the detailed comments on
PSKmail for this type of application. That is the
probably the closest I've seen to approaching
push message capability.
Here's some follow-up questions:
How does the mobile operator determine which
PSKmail base and frequency to check
--- In digitalradio@yahoogroups.com, expeditionradio
expeditionradio@ wrote:
The core question still remains:
How can we initiate (push) a message to the
mobile or portable operator in the field, when
the field operator has no expectation that a
message will be sent?
Or, even more
The core question still remains:
How can we initiate (push) a message to the
mobile or portable operator in the field, when
the field operator has no expectation that a
message will be sent?
Or, even more simply, how can we timely notify
the field operator You Have Mail via HF?
During the
The following questions are asked to the amateur
radio Emcomm community... how can we work together
on this?
THE TYPICAL SCENARIO
It is a dark and stormy night...
You are an amateur radio operator, volunteering
with a relief organization, for communication
to set up shelters in a hurricane
Hi Dave WB2FTX,
Does a station in the NTS Digital net
operate 24/7 on all HF bands simultaneously?
Does a typical station in the NTS Digital net use
8 transceivers to achieve simultaneous operation
on the 8 HF bands
80m/40m/30m/20m/17m/15m/12m/10m?
Or, does each NTS Digital station scan
Hi Dave,
Is NTS Digital operating 24/7 on all international HF bands?
80m/40m/30m/20m/15m/12m/10m?
Bonnie VR2/KQ6XA
Dave WB2FTX wrote:
I kinda of thought that NTS Digital had been doing
this for the past 10 or 15 years on a 24/7 basis,
maybe I was mislead.
Dave WB2FTX
Eastern Area
Sorry, I forgot to list the 17m band :)
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com, expeditionradio
[EMAIL PROTECTED] wrote:
Hi Dave,
Is NTS Digital operating 24/7 on all international HF bands?
80m/40m/30m/20m/15m/12m/10m?
Bonnie VR2/KQ6XA
Hi Dave,
Has any station in the NTS Digital net
operated 24/7 on all HF bands simultaneously?
80m/40m/30m/20m/17m/15m/12m/10m
with multiple transmitters, or scanning?
Bonnie VR2/KQ6XA
Dave WB2FTX wrote:
I kinda of thought that NTS Digital had been doing
this for the past 10 or 15
Audio News by This Week In Amateur Radio reporting on:
Global ALE High Frequency Network Operates 500 Days
Click here to listen:
http://hflink.net/press/HFN_500_days_twiar_news.mp3
Thanks to Larry W2LAG for his coverage of HFN
news for This Week In Amateur Radio.
Visit the TWIAR website at:
GLOBAL HIGH FREQUENCY NETWORK OPERATES 24/7 FOR 500 DAYS
FOR IMMEDIATE RELEASE [Global ALE High Frequency
Network] http://hflink.net/ 07 November 2008 - The Global ALE High
Frequency Network (HFN) has become the first network to operate
continuously for more than
Yesterday, I listened to a recording of one of the crew on the ship
calling into the regular 911 operator, using a mobile cellphone.
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com, Andrew O'Brien
[EMAIL PROTECTED] wrote:
Anyone know of frequencies to monitor for traffic related to the
We haven't seen MT63 on 14109 for several years.
It is mostly ALE and PACTOR.
It seems that MT63 is dead, except for a few
bulletins among MARS and UK emcomm.
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com, John Becker, WØJAB [EMAIL PROTECTED]
wrote:
14,109.5 still being used for
Hi Ron,
Use a portable HF receiver with a whip antenna and walk around, track
it down by signal strength. This will find the source 90% of the time.
Take 2 ferrites and call me in the morning...
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com, w4lde [EMAIL PROTECTED] wrote:
I started to
It has been argued by several in this
group that the first part of a digital
mode transmission may be deleted by
faulty transmit hardware without any problems
in the reception on the other end. In other
words, the first part of a transmission may
be thrown away or discarded, and the message
Hi Bob,
There are several alternative RF designs for
100W transceiver applications which enable
solid state RX/TX switching without the need
for the old 100W PIN diode brute-force 50 ohm
T/R switch approach, that takes a power supply
almost as big as the one that is running the
radio.
A
Rud Merriam K5RUD
Bluntly, you are ignoring the reality of trends
in computer hardware.
Hi Rud,
There's no problem with the computer hardware,
simply a problem with the commercially made
interface between the computer and the radio.
Any interface that deletes part of the transmit
Peter OZ1PIF/5Q2M wrote:
Either you have to add an external USB- RS232
[...] or resort to the VOX solution.
Hi Peter,
For ARQ or handshaking modes, VOX is simply
way too slow. Signalink will not work.
Not an option. Let's crunch the numbers:
1. Really fast VOX with 25milliSecond PTT delay.
Sholto Fisher wrote:
Bonnie and all,
I use the SignalLink SL-1+ (older version, not USB)
for ARQ modes successfully. I use MultiPSK and the
ARQ modes I have tested and had
working are: ALE 141A, ALE400, Pax/Pax2 and Packet.
Hi Sholto,
The fact that you were able to make contacts
--- In digitalradio@yahoogroups.com, Sholto Fisher [EMAIL PROTECTED] wrote:
Hi Bonnie,
Does it really make that much difference?
73 Sholto.
Yes, it really does make a difference :)
Please see my previous explanation where I
detailed the exact number of symbols that
are deleted by
matt gregory wrote:
Bonnie what do you suggest using with out spend
a whole lot
i was also looking at the rigblaster plug and play usb
MATTHEW A. GREGORY
KC2PUA
Hi Matthew,
The Rigblaster Plug N Play is an excellent choice.
Almost any of the interfaces that include PTT
using
Sholto Fisher wrote:
I can't believe it makes any significant
difference at least for ALE400 FAE.
Hi Sholto,
Whether you believe it or not, that's
up to you. But the math doesn't lie,
and neither does the oscilloscope.
IMHO, any interface that chops off part of your
transmission, for
IMHO, it is ridiculous to suggest that
the protocol implementers should change
the protocol to add overhead to accept
cheapo bogus hardware. In many cases, the
excellent worldwide standards have already
been set, and the proliferation of
sub-standard interfaces on the market is
not going
Signalink is not capable of high speed ARQ.
It uses vox, and doesn't have a real PTT with RTS.
Bonnie VR2/KQ6XA
--- In digitalradio@yahoogroups.com, matt gregory [EMAIL PROTECTED] wrote:
WONDERING IF ANYBODY IS USING A SIGNALINK SL+
FOR HIGH SPEED ARQ SOFTWARE IE RFSM2400 OR ALIKE ?
I'M
For ALL present and future afsk Digital DATA modes.
PTT via built in soundcard vox system.
My big question about this interface is... only via vox ?
Or does it also provide PTT via RTS?
As many already know, vox, such as provided by
the Signalink interface, is way way too slow for ARQ
or
Dick Zseltvay, KC4COP wrote:
I've been attempting to establish a list of a suggested frequencies
to be used with the various digital modes in Region-Two for quite
some time.
Hi Dick,
Probably the best we can hope for is a documented snapshot of a point
in time. As an example of such a
One of the recent developments in soundcard digital texting frequency
groupings we have seen over the past 5 years or so, is in the 20 meter
band, where several passband sections of it are popular for weak
signal, QRP, or very narrow signals. This evolved in the space between
the common PSK and
VK3ZFS Frank wrote:
a USB sound card looking for low noise and wide
dynamic range.
looking at lowest cost as possible.
Hi Frank,
When you find it, please let us know, be cause
I'm also looking for USB Sound Device Nirvana :)
It would seem that the two requirements of:
1. lowest cost
A google search:
16 bit 48 kHz USB SOUND
turned up some new USB sound devices at reasonable prices (US$25-US$60).
Many of these units are intended for Hi Fi audio and have RCA connectors.
Beware of the ones that fit within a USB connector and have only 2
mini-plug connectors. They often sell
Report Log of the ALE High Frequency Network HFN
for IARU GlobalSET 03 MAY 2008
On the 3rd of May 2008, the ham radio Global ALE
High Frequency Network (HFN) was activiated to
participate in the International Amateur Radio
Union (IARU) Global
Dave, AA6YQ wrote,
The amateur radio's community rapidly adopted PSK31
once panoramic reception on soundcard-equipped
PCs became available.
When the dogs don't like the dogfood, its a mistake
to blame the dogs...
Dave,
A more accurate ham radio dogfood analogy would go like this:
I
When was the last time you talked to a teenage ham on HF digital?
If you are a ham in a Western country, more than 35 or 40 years old,
it is likely that you are last of the generations of active hams in
your country.
Look around, there are very few new young hams.
Right now, I'm seeing a
Dave KB3MOW wrote:
When I'm going to run digital modes, I'd
simply select the no mic position so that room
audio doesn't get transmitted.
I don't see that as being sloppy at all.
Hi Dave,
Sorry if I offended you by calling manual
mic muting sloppy station control.
No personal offense
Hi Dave,
Many transceivers have automatic
muting of the microphone whenever the rear
panel accessory jack PTT is in use...
and they do not require external switching
or modification.
However, some Icom transceivers and other
brands do not have internal muting of the
microphone muting when the
To mute the mic audio, you only need to short the microphone hot pin
to ground. A simple single pole single throw switch (normally open)
will work. However, you will need to manually switch it each time you
transmit... and perhaps that is rather sloppy station control.
Bonnie
--- In
Hi Andy,
Within the past year, the Winlink system has basically evolved to
become the standard ham radio Emcomm messaging backbone.
The Winlink development team has upgraded the system from the previous
system, and now has all the RMS (Remote Message Servers) access points
communicating
1 - 100 of 547 matches
Mail list logo
