[CW] A report for those who are considering 475 kHz

cbayona via CW cw at mailman.qth.net
Mon Oct 13 12:01:48 EDT 2014 

For hams it is new and since we have not built 
radios for that band it's considered experimental to us.

At 10:38 AM 10/13/2014, you wrote:
>OK. Â Just sounds odd to me. Â To me the word 
>"experimental" means things like "new", "unproven", " never been done before".
>
>73, de Hans, K0HB "Just a Boy and his Radio" 7⃣3⃣
>
>
>On Sun, Oct 12, 2014 at 9:32 PM, 
>wealsowalk at aol.com <<mailto:wealsowalk at aol.com>wealsowalk at aol.com> wrote:
>There are several reasons why 600 meters can be 
>experimental Hans.  One obvious one is that for 
>those of use who have not done commercial or 
>marine radio there is a very big learning curve 
>to getting onto the band.  You know, not all of 
>us have worked at KPH or gone into Italy during 
>a war to set up a 500khz station.  Also many of 
>the experimenters are developing antennas, 
>computer modes, and radio parts being proven on 
>the band.  You will see similar things going 
>on, possibly in more depth, at 137 KHz and at 22Khz or so.
>Bill Isakson
>AC6QVÂ  --Â  WD2XSH/44
>Â
>Â
>-----Original Message-----
>From: Radio K0HB via CW <cw at mailman.qth.net>
>To: sbjohnston <sbjohnston at aol.com>; vk2acl 
><vk2acl at gmail.com>; wa1tjb <wa1tjb at yahoo.com>; cw <cw at mailman.qth.net>
>Sent: Sun, Oct 12, 2014 3:01 pm
>Subject: Re: [CW] A report for those who are considering 475 kHz
>
>Not sure why the 600-meter vicinity is suddenly 
>thought to be "experimental".  Mariners like 
>myself and Dave Ring used it for normal 
>communications for decades, and other Sailors 
>before us back to the dawn of the radio age.
>Â
>Just sayin’
>Â
>73, de Hans, K0HB
>--
>"Just a boy and his radio"™
>--
>Proud Member of:
>. A1 Operators - <http://www.arrl.org/a-1-op>http://www.arrl.org/a-1-op
>. Minnesota Wireless contesters - <http://www.W0AA.org>http://www.W0AA.org
>. Arizona Outlaws contesters - 
><http://www.arizonaoutlaws.net>http://www.arizonaoutlaws.net
>. Twin City DX Assn - <http://www.tcdxa.org>http://www.tcdxa.org
>. Minnesota Amateur Radio Technical Society - 
><http://www.mn-arts.org/>http://www.mn-arts.org/
>. Lake Vermilion DX Assn - <http://www.lvdxa.org>http://www.lvdxa.org
>. Royal Navy Amateur Radio Society – 
><http://www.rnars.org..uk>http://www.rnars.org.uk
>. SOC - <http://www.qsl.net/soc>http://www.qsl.net/soc
>. CW Operators Club – <http://www.cwops..org>http://www.cwops.org
>. SKCC - <http://www.skccgroup.com/>http://www.skccgroup.com/
>--
>From: <mailto:cw at mailman.qth.net>Steve WD8DAS via CW
>Sent: Sunday, October 12, 2014 9:33 PM
>To: <mailto:vk2acl at gmail.com>vk2acl at gmail.com ; 
><mailto:wa1tjb at yahoo.com>wa1tjb at yahoo.com ; 
><mailto:cw at mailman.qth.net>cw at mailman.qth.net
>Subject: Re: [CW] A report for those who are considering 475 kHz
>Gary, there are quite a few websites where the 
>experimental stations describe their 
>setups.  Try a search for "630m experimental" 
>or "600m experimental" to turn them up.
>
>The WSPR mode is described at
>
><http://en.wikipedia.org/wiki/WSPR_%28amateur_radio_software%29>http://en.wikipedia.org/wiki/WSPR_%28amateur_radio_software%29
>http://physics.princeton.edu/pulsar/k1jt/wspr.html
><http://wsprnet.org/drupal/>http://wsprnet.org/drupal/
>
>The WSPR software is a free download, and the 
>website where the reports are organized and 
>displayed is free to use.  No cost at all.  It 
>is used on all bands, not just 630 meters.
>
>Matt, sorry for my USA-centric posting - you are 
>correct that lots of countries have authorized 
>630 meters as a ham band.  It puzzles me why 
>the goverment here hasn't done so yet.Â
>
>I received an email asking about my receive 
>antenna...  My best choices are my 75-meter 
>inverted vee dipole (with the transceiver preamp 
>turned on), or my ground mounted 8' whip with a 
>preamp at the base (preamp off in the 
>receiver).  I've been very dilligent about 
>keeping noise sources in my house to a minimum, 
>but neighbors and powerlines do cause noises at 
>times.  I made a 10-foot shielded loop active 
>antenna out of coax inside PVC pipe but it is 
>stored in the garage right now - too unwieldy 
>and has to be turned to peak signals or null noise.
>
>I also had a question about the ground system 
>for my inverted-L antenna.  The ground side of 
>the antenna is just my regular station 
>ground.  The central ground point is along a 
>section of wall where the all the utility 
>service entrances are located. This central 
>ground is a few feet of 1/2" copper pipe with 1" 
>copper straps connecting to the power entrance 
>ground, an 8' rod driven right outside the 
>house, the iron and copper water pipes (before 
>and after water meter), and the metal HVAC 
>ductwork in my house.    To this ground 
>system I have connected to this (with more 1" 
>copper strap) the operating desk star ground, my 
>two Gates BC-1T transmitters, the 630m 
>transmitters, and the shields of all my various antenna feedlines.Â
>
>I made no special ground for the 630 meter 
>antenna system - just made sure its ground side 
>was well-attached to my existing station 
>ground.  The outside of the various coaxial 
>cable shields form accidental counterpoises and radials I'm sure.
>
>
>Steve WD8DAS
>
><mailto:sbjohnston at aol.com>sbjohnston at aol.com
>http://www.wd8das.net/
>--------------------------------------------------------------------
>Radio is your best entertainment value.
>--------------------------------------------------------------------
>
>
>
>Â
>Â
>-----Original Message-----
>From: Matt VK2ACL <<mailto:vk2acl at gmail.com>vk2acl at gmail.com>
>To: Gary Smith 
><<mailto:wa1tjb at yahoo.com>wa1tjb at yahoo.com>; CW 
>Reflector <<mailto:cw at mailman.qth.net>cw at mailman.qth.net>
>Cc: sbjohnston <<mailto:sbjohnston at aol.com>sbjohnston at aol.com>
>Sent: Sun, Oct 12, 2014 2:06 pm
>Subject: Re: [CW] A report for those who are considering 475 kHz
>
>There is a yahoo group on this topic, which 
>includes a lot of activity in VK and ZL (where 630m is already a ham band):
>https://groups.yahoo.com/neo/groups/600m/info
>
>73,
>Matt VK2ACL
>
>On 13 Oct 2014, at 5:55 am, Gary Smith via CW <cw at mailman.qth.net> wrote:
>
>>Hi Steve,
>>
>>Do you have some websites where we can learn 
>>more, and any other data relative to equipment 
>>to build/modify and antennas to use?
>>
>>Sounds fascinating!!
>>
>>Gary
>>WA1TJB
>>
>>
>>On Sunday, October 12, 2014 1:29 PM, Steve 
>>WD8DAS via CW <cw at mailman.qth.net> wrote:
>>
>>
>>Here's a report for those who are considering 
>>getting active on 475 kHz. 630m isn't a ham 
>>band yet but there is already ham-style activity...
>>
>>Last night I had a lot of fun on 630 
>>meters.  Quite a few experimental-licensed 
>>stations were transmitting in the WSPR mode, 
>>and even more non-licensed stations were receiving and reporting.
>>
>>Here's a map showing everyone my station heard, 
>>or was heard by, on the WSPR mode...
>>
>>Â Â Â Â  http://www.wd8das.net/WSPR-WH2XHY.jpg
>>
>>Here's a map showing everyone that was active on 630m WSPR last night...
>>
>>Â Â Â Â  http://www.wd8das.net/WSPRactivity.jpg
>>
>>Notice the reports from Europe, Alaska, and Hawaii.  Very cool!
>>
>>WSPR's S/N reporting is useful to know when 
>>propagation is good enough to support normal 
>>contacts.  When the S/N ratios are higher then 
>>it is time to go to CW... where I made two CW 
>>contacts with Pennsylvania and Texas 
>>experimental stations.  Conditions seem to be 
>>getting better as we move into winter.
>>
>>Details on my 630m station...
>>
>>Â Â Â Â  http://www.wd8das.net/630m.html
>>
>>
>>Steve WD8DAS / WH2XHY
>>
>>sbjohnston at aol.com
>>http://www.wd8das.net/
>>--------------------------------------------------------------------
>>Radio is your best entertainment value.
>>--------------------------------------------------------------------

-- 
Cecil - k5nwa
<  http://thepartsplace.k5nwa.com/ > <  http://www.softrockradio.org/ >

Never take life seriously. Nobody gets out alive anyway.

More information about the CW mailing list