NOVA #3602 The Spy Factory

sent in from Bob Geis N2DET: This might be an interesting broadcast for all radio mode monitors and operators.

WLIW 21 LONG ISLAND (SEE WNET and NJN schedule info at end)

NOVA # 3602 The Spy Factory
9:00pm Wednesday, February 04

For the first time on television, NOVA exposes the hidden world of
high-tech, 21st-century eavesdropping carried out by the National Security
Agency (NSA). Today, the NSA is the world's largest intelligence agency,
three times the size of the CIA and far more secret. Its mission is to
eavesdrop on the world -- from cell phones in Europe to pay phones in
Afghanistan to email messages from Pakistan to Baghdad. Since 9/11, NSA
has listened in without warrant on thousands of American citizens. Based
on the latest best-seller by journalist James Bamford. (Closed Captioning)

Additional Airdates:
1:00am Thursday, February 05
3:00am Monday, February 09
1:00pm Tuesday, February 10

This program will also be on:
WNET/13
February 3rd at 8PM, February 7th at 3PM and February 10th at 1AM.
NJ Network/50&58
February 11th at 9PM

Also on WGPH Schenectady in February.

QRP "L" Network Transmatch

Here's a few pictures of my first homebrew, portable transmatch:



I built it out of spare parts in the junk box and from a few gathered at hamfests. I used a typical radio shack plastic black box, they're usually sturdy enough. The capacitor is an air variable, silver plated type while the toroid is from an old, scrapped computer supply. The design uses 5 switchs to parallel different inductances which gives about 32 possible combinations, all from a common inductor. The setup is the typical "L" network type with a slight twist: its a high pass design rather than the common low pass type. I also put in a homebrew led swr bridge - one of my first attempts to reproduce a similar circuit by N7VE(http://www.qrpkits.com/files/LED%20SWR%20v1.pdf). Here it is in action with my trusty FT 817 and CTE flameproof navy key atop of Mt. Taurus in Cold Spring, NY:


Will try to post some schematics later on when I scan them in. If anyone would like to attempt building some of these circuits you can reach me at kc2bnx@gmail.com - 73 for now de KC2BNX.

QRP "T" Transmatch Project

Greetings all, figured I'd share with everyone a neat little project of mine that I just recently finished. Built out of parts from my junk box and a few from ebay and hamfests I managed to put together this little miniature "T" (C-L-C) network transmatch:

It uses two polyvaricon capacitors - the kind you'd find in most am/fm pocket radios both with a range of ~11-150pf each, an swr L.E.D. bridge, and 12 position rotary switch connected to a toroid which was taken from an old computer power supply. Range of inductance is from a few fractions of a uH to about 47uH. I built it mainly to reduce weight considering my other "portable" transmatch is a basic "L" network configured as a high pass filter which weighs a bit more and takes almost twice the space as the "T" transmatch. Looking forward to taking it hiking with me when the weather gets better(and warmer). Will be posting some more blogs soon, 73 for now de KC2BNX.

Analog to Digital TV conversion (humor)

This could be why the FCC asked for help from the Amateur Radio Community:

http://www.hulu.com/watch/36608/talkshow-with-spike-feresten-cable-psa#s-p1-st-i1

They might need it more if the conversion is delayed:

http://www.hulu.com/watch/54019/talkshow-with-spike-feresten-tv-psa-update#s-p1-st-i1

January Meeting...AWESOME!

I wanted to thank all those that came out for the meeting on January 3rd. We all had a blast. Jeff's presentation on SATERN was very informative. Thanks also to Joe and Sean for show and tell of their jump kit!

I brought up at the meeting the idea of a simplex 2 meter frequency. After monitoring 146.535, it was decided by John and I to change the frequency, so QSY's "Official" frequency at meetings, events, etc will be 147.525, no PL.

Looking forward to seeing everyone in February!

Kieran
N2MWE

6 METER MOXON ANTENNA

This is a 2-el Yagi made from dipoles bent in the shape of a U, the longer element is the reflector, the input Z is 50 ohms and no matching network is needed.



Gain is about 6 dB, FB about 25-30 dB.

Resonant Frequency = 51.088, SWR = 1:1 measured with MFJ 269 Analyzer.

SWR is under 1.6 from 50.000 to 54.000 MHz.

Driven Element is 80in end to end with 1/2in space at feed point. The driven element also has a 10 1/4in elbow on both ends.

Reflector Element is 80 1/2in end to end, with 15 3/8in elbow on each end.

Width of antenna is 29 3/4in. Spacing between Driven element and Reflector element elbows is 4 1/8in. Make the SWR measurements by moving the reflector close to the driven element or away from driven element.

This was a fun project, coming from a Lawn Chair to an Antenna that works great, it has been tested and works great. Refer to website www.moxonantennaproject.com/design.htm

WA2WMJ JB

2 METER MOXON ANTENNA

MOXON ANTENNA: Invented by Les Moxon G6XN (SK 2004), is sort of a two element yagi with the elements folded and spaced to eliminate the need for an impedance match.
A carefully optimized and constructed moxon can easily exceed the gain and bandwidth of a sloppily designed and constructed yagi. Also, the moxon is smaller than the typical yagi and much smaller than the typical J-pole antenna.
The Gain is typically 7-14 dBi, depending on accuracy of construction. Although this is a directional high gain antenna, it has a very large aperture with a high front to back ratio. If pointed directly up, this can make a decent satellite antenna.




Lawn Chair parts for the antenna.
Corners from lawn chair with wood separators, one screw is good to hold it together.
Almost an antenna.



Make both sides the same, connect the coax and have some fun




THIS ANTENNA WORKED BETTER THAN EXPECTED, Had fun making this antenna, the Moxon Calculator can be found on line, making measurements easy.
www.moxonantennaproject.com/design.htm

HAVE FUN AT THE NEXT QSY MEETING. WA2WMJ JB