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Re: Intruder on two meters - New Braunfels

WN4VCH

#193

The tranmissions were in FM.

Show quoted text

-----Original Message-----
From: W5SC@yahoogroups.com [mailto:W5SC@yahoogroups.com] On Behalf Of Shane
O'Neal NS5D
Sent: Thursday, February 01, 2007 4:33 PM
To: W5SC@yahoogroups.com
Subject: Re: [W5SC] Intruder on two meters - New Braunfels

Is it possible that these two fellas were running linear amplifiers on CB
and were close enough to you so as to get into the front end of your radio?

Some of those guys put out a kilowatt or more.

Intruder on two meters - perhaps not

WN4VCH

#194

Email received from a New Braunfels ham regarding the two meter
'truckers' that I heard today.  This is likely who I heard - not
intruders after all.

"actually there are two truckers that _are_ hams in this area.  they
haul dirt or something.  been around for years.

they hang on 147.00 (usually) and 147.14, and have heard 'em on
443.500 (the saltgrass system ?)"

Re: Intruder on two meters - New Braunfels

Shane O'Neal NS5D <shane@...>

#195

Stubborn and hard-headed as I am, I decided not to take the word of the experts, but to put my second theory below to the test. I could not test the first one without violating the law.

I set my Yaesu VX-6R on 146.520, with a squelch setting of 2. I set my Yaesu FT-757GX to 29.304 Mhz, AM, at 100 watts, with the mike gain turned all the way up. My antenna is a long-wire going into an MFJ roller inductor tuner.

I made some test transmissions on AM on 29.304, with my VX-6R held at arms length away. I was able to hear my voice through the VX-6R. Even though it was very distorted, my transmission was clear enough to be understood, and caused audio feedback. I tuned down to 146.510 and up to 146.530 and did not hear myself.

Then I switched to FM on 29.304 and made some more test transmissions. I was able to hear my voice clearly through the VX-6R, with no distortion. Then I moved the VX-6R across the room from the radio, about 10 feet or so. I was still able to hear my voice clearly while transmitting on 29.304. I was not able to hear anything on 146.510 nor 146.530.

So I stand by the idea that it is theoretically possible to hear two people talking on 29.304 in AM or FM mode, with an FM receiver tuned to 146.520, if you are in close proximity to them and they are running some power. I'm not saying that this is what WN5VCH heard, because it sounds like that was not the case.

The test is easily repeatable if you doubt my results.

I never claimed to be the expert, and I'll be the first one to admit that if I can pass the Extra class test, it is way too easy. Also, I guess I started the mudslinging by insulting the knuckle-heads, so I should have expected no less than an impolite response.

Disclaimer:

Before I get taken out by the sharpshooters, I want to say that I am aware that 29.304 is out of the FM subband on 10 meters, as defined by gentleman's agreement in the ARRL bandplan. However, Part 97 authorizes "phone" in that band and does not specify which flavor. Further, Part 97.305b states that "A station may transmit a test emission on any frequency authorized to the control operator for brief periods for experimental purposes...".

Show quoted text

----- Original Message ----
From: Shane O'Neal NS5D <shane@ns5d.com>
To: W5SC@yahoogroups.com
Sent: Thursday, February 1, 2007 10:10:40 PM
Subject: Re: [W5SC] Intruder on two meters - New Braunfels

Again, at the risk of being out-radioed by some more experienced hams...

The fifth harmonic of 27.185 (CB channel 19) is 135.925. Add a power mike and you get splatter. Add a linear and you get powerful splatter. To me that puts these guys in the ballpark even if they were operating on legitimate CB frequencies, especially if you were real close to them.

Another variation on this scenario might be that they are operating some of those truck stop special 10-meter radios (25-30mhz) illegally. The 5th subharmonic of 146.520 is 29.304. A lot of these Galaxy/President/ whatever radios have an FM mode also. This doesn't make it any better than if they were talking on 2 meter radios, but it sounds more plausible to me that a couple of truck drivers would be using these rather than intentionally using 2 meter VHF radios.

Third possibility - these guys actually were hams who just got lazy and didn't give their call signs because they thought no one was listening. I have talked to many OTR drivers with amateur licenses.

Fourth possibility - Gosh, they might actually have two meter radios and be on the national calling frequency, and not have a license. Given some of the conversations I've overheard on 146.520 around here, trash-talking truckers might be an improvement. ;-)

Just trying to make it interesting guys...

----- Original Message ----
From: Mike Check <k5ucq@arrl.net>
To: W5SC@yahoogroups. com
Sent: Thursday, February 1, 2007 8:39:01 PM
Subject: [W5SC] Intruder on two meters - New Braunfels

HF to VHF? What a jump! 

Mike Check 
Amateur Radio K5UCQ 
13 WPM General Class Licensee 
-------Original Message----- -- 

From: Shane O'Neal NS5D 
Date: 2/1/2007 4:36:44 PM 
To: W5SC@yahoogroups. com 
Subject: Re: [W5SC] Intruder on two meters - New Braunfels 

Is it possible that these two fellas were running linear amplifiers on CB
and were close enough to you so as to get into the front end of your radio? 

Some of those guys put out a kilowatt or more. 

----- Original Message ---- 
From: WN4VCH <wn4vch@gmail. com> 
To: W5SC@yahoogroups. com 
Sent: Thursday, February 1, 2007 3:20:30 PM 
Subject: [W5SC] Intruder on two meters - New Braunfels 

02/01/2007 

QTH: Mobile, on Hwy 46 east of the intersection of 46 and FM1863 near 
an area of construction. 

Frequency: 146.520 

Monitored conversation between two truck drivers regarding their 
trucks, trailers and the manner in which the were being loaded. 
No callsigns. Clearly not hams. I was passing through the area and 
did not have to time drive around and try to find where they were working. 

Russell (WN4VCH)

Re: Fw: 5th harmonic

Louis Upton

#196

Well, if I can here HF Transmissions bleeding over on CB Channel 19, then why can the opposite not be true.  If an individual is running enough power, I figure anything is possible.  
   
  I am trying to learn, so more theories please!!.
   
  Louis

 
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Need Mosley RV-4C Vertical Antenna Information

davidftx <davidftx@...>

#197

I am trying to help Floyd, KE5HBF, put up a Mosley RV-4C vertical
antenna that he bought at SwapFest.  All of the information on the
Mosley website indicates that this antenna wants to be mounted on a
2 inch mast.  What's missing is the base mount.  The guy who sold it
to him apparently had it mounted on the roof.  The 5/8" tubing of
this 21 foot trapped vertical was resting on a cone shaped piece of
ceramic, which may have been part of the original mount, but it
certainly wasn't all of it.  This piece of ceramic is 3" long and is
about 1/2" at the top, then tapers out to about 1".  The seller had
the cone mounted on a 4" x 8" piece of aluminum that was curved to
fit the peak of a roof.  The antenna had rested on the small end of 
the ceramic cone, but only came down about 5/8".  The whole thing
had to be supported elsewhere to stay up and I suspect he guyed it
several times.  It still couldn't have been very stable.

Floyd and I would like to mount this on a 2" (or other diameter)
mast, up maybe 10' to get it above his eave.  Has anyone ever had
one of these Mosley verticals?  I would be glad to try to fabricate
a mount but would like to start with some idea of what originally
was used.  Thanks for any input.

David
K5OLE

February 13, 2007 SARC Board of Directors Meeting

davidftx <davidftx@...>

#198

San Antonio Radio Club

Board of Directors Meeting

February 13, 2007

6:30 PM

Coker United Methodist Church

Wesley Hall Room 804

231 E. North Loop Road

Wesley Hall Room 802

Coker is located near US 281 and Nakoma.  This is the same place and the
same room where the Board last met.

All members of the San Antonio Radio Club are always invited to attend
the Board of Directors meetings.  If you have any questions, please call
David Freiberger at 210-408-1564 or email k5ole@arrl.net
<http://groups.yahoo.com/group/W5SC/k5ole@arrl.net> .

Skywarn Training for South Texas

davidftx <davidftx@...>

#199

Larry Eblen, from the National Weather Service, gave a great
presentation at last night's meeting about Skywarn and amateur radio's
value to the NWS.

He has posted the following information regarding Skywarn training in
South Texas which starts tomorrow in Austin.

Please note that the San Antonio date is the same as the regularly
scheduled VE test session.  This will be a large session and we are
needing volunteers to assist.

------------------------------------------------------------------------&#92;
-

All,

This is just a short reminder - our schedule of regional Skywarn
Conferences begins tomorrow.  You can find a schedule of all our Skywarn
Training Classes - both regional and county programs - on the web at:
www.srh.noaa.gov/ewx/html/skytrn.htm
<http://www.srh.noaa.gov/ewx/html/skytrn.htm>

The first regional Conference will be held in Austin from 8:15 am to
4:15  pm tomorrow at the J.J. Pickle Center on Burnet Road.
Details are available at:
www.utexas.edu/depts/grg/kimmel/SKYWARN2007.html
<http://www.utexas.edu/depts/grg/kimmel/SKYWARN2007.html>

The second regional Conference will be held in Uvalde from 9:00am to
3:30 pm on Saturday, February 17, in Tate Auditorium at Southwest Texas
Junior College.
Details are available at: www.srh.noaa.gov/ewx/html/uvagenda.pdf
<http://www.srh.noaa.gov/ewx/html/uvagenda.pdf> .

The third regional Conference will be held in San Antonio from 8:00 am
to 4:00 pm on Saturday, February 24, in Bonilla Science Hall at the
University of the Incarnate Word.
Details are available at:  www.srh.noaa.gov/ewx/html/skygenda.pdf
<http://www.srh.noaa.gov/ewx/html/skygenda.pdf>

Our final regional Conference will be held in Kerrville from 8:00 am to
12:15 pm on Saturday, March 3, at the Inn of the Hills.
Details are available at:  www.srh.noaa.gov/ewx/html/keragenda.pdf
<http://www.srh.noaa.gov/ewx/html/keragenda.pdf> .

Each of these will include a Basic Skywarn Class as well as an Advanced
Skywarn Class, with some outstanding additional speakers on topics from
safety to building partnerships to reading radar.  They are open to all
- spotters, emergency managers and planners, first responders, Amateur
Radio Operators, city and county officials, teachers, students - and the
public in general.  There is no charge - just show up and learn.

------------

One short mention about weather. . .we will see another strong cold
front move into South Central Texas on Monday morning.  With warm, moist
air returning to South Texas on Sunday, and very cold air aloft driving
this front, we could have some isolated severe storms Monday morning.
They would be more likely to occur along and east of a Bastrop to
Lockhart to Seguin to Floresville line.

Larry

BexarWire Archives now on w5sc.org

davidftx <davidftx@...>

#200

Paul, N5IUT, spent a lot of time this weekend pdfing the archive of old
BexarWires and putting them on our website at
http://www.w5sc.org/Publications.html
<http://www.w5sc.org/Publications.html> .  Take a look at them.

While hustling to get documentation ready for tonight's Board meeting I
randomly downloaded the November, 1998 BexarWire, just for fun.  What a
shock---the more things change the more they stay the same.  What I
found read like it was written yesterday:

    * The Flood of '98 had just ocurred and the President wrote his
column while being a radio operator at a Red Cross shelter.
    * Teri Thomas, KC5BJI, had worked countless hours getting ham
volunteers for shelters.
    * SARC was in the throes of trying to be a Special Service Club. 
Again.
    * SARC met at the Covenant Presbyterian Church in 1998.  There was
discussion about moving the meeting time to 7:00pm from 7:30p.m, just as
there will be tonight.
    * Nominees for office included Steve Cerwin, Royce Taylor, Richard
Elder, Ginny Check, and Mike Check.
    * Dues were $15.oo per year.
    * SARC was having trouble with attendance at their regular monthly
meetings!

Amazing.  Check out Paul's hard work and a little bit of Club history on
the website.

K5OLE

Please Consider Helping This Tuesday Cleaning up The Club Trailer

davidftx <davidftx@...>

#201

The club trailer, located behind KCOMM, has been hit again by taggers. 
The side that faces US281 is covered with graffiti and we will have a
clean up party this Tuesday starting at 3:30 PM.  If you are off of work
at that time your help would be greatly appreciated.  The weather will
be great.  If a few of us are available we can get the thing cleaned up
in about an hour and a half.  Please let me know if you can assist. 
Email me at davidftx@swbell.net <mailto:davidftx@swbell.net> .   Thanks,
David K5OLE

Please Help at Test Session

Paul Guido

#202

This Saturday, February 24, 2007 the San Antonio Radio Club will host
its regular test session for the first time at Broadway National
Bank.  For more information go to http://w5sc.org/Testing.html

This was done to accommodate the added numbers of those testing and
upgrading due to the rule changes.

We are looking for volunteers to help directing those attending the
session from the parking area to the testing area and to help the
applicants as needed.  You do not need to be a VE to help out.  If
you have some time to contribute please email me at
radioteacher@gmail.com

For the 23rd and 24th statewide there are only test sessions listed
in the ARRL database for the following cities.

GARLAND, TX
LONGVIEW, TX
WACO, TX
SAN ANTONIO, TX
VAN, TX
CONROE, TX
BURNET, TX
TOMBALL, TX

Thank you,

Paul Guido, N5IUT