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 31 
 on: Yesterday at 07:16:00 PM 
Started by N5INP - Last post by KD8MJR
That documentary , I think It was called streepo or something like that about the guys holding the base in Afghanistan during a major attack  showed them listening in on the Taliban and those guys where using regular 2m and talking in the clear.

 32 
 on: Yesterday at 07:09:45 PM 
Started by N6YW - Last post by KD8MJR


so what do our nuclear power plants do when drones start entering their air space or monitoring their security protocols? while they can be used for good purposes, it seems to me the potential for them to be used for nefarious purposes should give all of us great cause for concern. 
[/quote

With the way thing are since 9/11 you would have to be cracked in the head to try that.
I would bet almost no amount of explaining is going to stop you from either getting jail time or paying a huge fine. 

 33 
 on: Yesterday at 07:07:33 PM 
Started by WAVEYDIPOLE - Last post by G7GMN
Hello Waveydipole,

This may be a bit late, but I have several of these radios in various guises.  The programming adaptor is very simple with a MAX232 and a 7404 in it.  There are a few flavours of the software available on the "interweb".  The manual for the earlier type CM7xxx radios is on mods.dk. The RF side of the radios is pretty similar between the old "handheld programmer type" and the PC programmed type.  There is apparently no easily available manual for the CM7xxx(X) radios on the "interweb".  I have a manual for the CM7200X, which covers all the control circuitry, which is almost identical across the various bands.

All the dash-mount CM7xxx(X) radios I have had have programmed via the HD15 connector on the back.
I have had a few that appeared "dead" but on examination was only caused by a small 'bussman' fuse being dis on the control-board where the small power connector plugs-in.  No shorts could be found and all worked OK after changing the fuse.

If you turn-on the radio while holding the FCN button, it will display the main and head firmware versions.  From that you would have to consult the cross-check list ( which is available on one of the yahoo sites ) which will say which version of software to use.  At that point the display will clear and will let you select up or down using the arrow-keys to change the squelch level, scan-group membership, contrast, man-down etc. To get out of that screen you have to turn radio off, then turn back on.  Maybe the screen is not displaying because the "contrast" has been backed right-off ?  I believe it uses a "default" contrast level when you power it on with the FCN button held.  Give it a try....

Most of the FM-only dash-mounts I have had use V6.20 software... Most of the AM/FM dash-mounts I have had use V3.04 software.  I can prog mine using a DOS window on XP.

I have found them very useful and have got a few of the CM7000A/A4 and CM7000A/A4/T mobile repeaters which all do what they are meant to.

Good luck, best wishes.

Ian.

 34 
 on: Yesterday at 07:02:08 PM 
Started by N6YW - Last post by KD8MJR
I doubt that!
Accuracy of the gps would have to be very good and you would have to have almost no wind.

 35 
 on: Yesterday at 06:49:59 PM 
Started by K7CO - Last post by K5GS
Obtaining an LoTW Callsign Certificate can require submission of a Landing Permit and/or Proof of Entry as well as a license to operate, as described here.

      73,

             Dave, AA6YQ



Hi Dave,

Thanks, I didn't see that...  

Where I'm getting hung up is the part about: valid for DXCC Award credit.

In the certificate request process TQSL asks:

"Use the drop down menu to select the DXCC entity that matches your call and where you are operating."  

To me, that doesn't mean the newly certified call sign will be approved for DXCC award purposes. It means the call sign is associated with a DXCC entity.

For example:

I have a VK call sign and can apply for an LoTW Certificate for that call sign tonight. The call is issued to me and it's associated with VK.

But the call sign is not valid for DXCC award purposes until I prove I was in VK during the claimed dates of operation.  That's a DXCC documentation requirement,  i.e prove you're where you say you are.

I see where the  LoTW certificate will only be issued to a call sign associated with a DXCC entity, but that doesn't confer DXCC accreditation, does it??  

Am I confused here?  If so, I stand corrected.

Cheers,



 36 
 on: Yesterday at 06:47:12 PM 
Started by K7CO - Last post by N3QE
My understanding is that an LoTW Callsign Certificate will only be issued to a station that is valid for DXCC Award credit.

Don't think that's the only case. I have a number of "/MM" QSL's in LOTW, that are solid QSL's, but do not count for DXCC. (Or much of anything! WAZ also excludes maritime mobile.) These show as "DXCC -NONE- (0)".



 37 
 on: Yesterday at 06:42:40 PM 
Started by K5UNX - Last post by KA1DBE
I have used YFKtest for the past couple of years.  Works well for me and writes Cabrillo and ADIF.  Only has 8 commands and I like using the space bar to go between fields.  Supports a lot of contests.  I use it with Debian Wheezy and works just fine.  73

 38 
 on: Yesterday at 06:40:09 PM 
Started by KG5BXK - Last post by KG5BXK
The 2014 South Texas hamfest will be held at the Aransas Pass Civic Center on November 7th & 8th.  We are in a much, much larger location this year!!  This Hamfest will be the biggest yet in South Texas. We have over 8000 square feet of Exhibit Space and over 100+ tables available.  Just 20 minutes from downtown Corpus Christi, there are many nearby attractions to top off an awesome weekend of friendship, fellowship, and hamming it up.  Take advantage of the advance registration price of only $8 and receive 2 door prize tickets with your purchase.  For more information, please visit http://www.southtexashamfest.org

 39 
 on: Yesterday at 06:37:10 PM 
Started by VK5DO - Last post by WX7G
I believe hams have phased collinear arrays using open wire line.

A low loss single-band 4:1 balun can be built using a 1/2 wavelength of coax. No need for ferrite here.

A good line impedance would be 200 ohms and the wire diameter to spacing ratio is 2.7:1. Two #12 wires spaced about 1/4" would do the job.


 40 
 on: Yesterday at 06:35:49 PM 
Started by W2BLC - Last post by V47JA
Hi,

I really like my Elecraft KPA500, not a single problem and bullet-proof.  Besides, what's a few dB of power when a good prefix is worth 15 dB anyway.  Smiley

73,

John

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