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Now you can listen to the Technet that best suites your needs! Don't forget to use your player's EQ to taylor the sound! To find a topic: Right now I have the "poor man's way" to search
for topics. In this browser window, go to the Edit Menu I understand this is a very crude way for searching, hey, it's better
than nothing I guess. In the future I will be installing a -Mike |
|||||
| 090104tech-001 | Winegard pre amplifiers - what features are important? | |
| The function of a rig's RF Gain control | ||
| Are there filters available that cut off above Ch. 51? | ||
| What is "dB noise figure?" | ||
| Can I connect a DTV decoder to my scanner to get DTV audio? | ||
| 090104tech-002 | DTV converter portability | |
| Using the DTV converter RCA output jacks | ||
| DTV antenna design vs. analog TV antenna design | ||
| How WNET's antennas are positioned on top of the Empire State Building | ||
| How can you get DTV on your portable Sony WatchMan? | ||
| How can you get DTV on your car mobile TV? | ||
| 090104tech-003 | The growth of G3, G4 streaming technology | |
| DTV converter portability revisited | ||
| Noise figure definition and amplifiers | ||
| Cablevision's fate after the DTV conversion | ||
| What output are on the back of a DTV converter? | ||
| Analog TV Peak Envelope Power vs. DTV PEP | ||
| Portable TV's with a built in DTV converter revisited from 081228tech-003 and 004 | ||
| 090104tech-004 | The EI&Z Discussions- Diagram 1 | |
| What would motivate a TV station to broadcast DT in VHF Lo? | ||
| The EI&Z Discussions- Diagram 2 --1/2wave plain wire antenna |
January 11, 2009 Show
| 090111tech-001 | Does Dish Network or DirectTV offer 1080 transmission? | |
| Blue ray quality vs. DVD quality | ||
| What DTV flickering looks like | ||
| Bad picture quality - is it the DTV box or the TV station? | ||
| Interlace vs. progressive DTV | ||
| 090111tech-002 | Group delay vs. phase delay | |
| DTV power dividers and wave guides used at the Empire State Building | ||
| Is it worth it to upgrade to a 40" DTV with a 120Mhz refresh rate? | ||
| Burn in characteristics of LCD and Plasma DTV screens | ||
| Comparing US and UK TV transmission signals | ||
| Portable DTV possibilities and reception test results revisited | ||
| 090111tech-003 | KE2EJ Eric's new digital repeater being built | |
| Portable DTV possibilities and reception test results revisited | ||
| Mel's home DTV reception results | ||
| What is the minimum micro volts needed for a good DTV signal VS an analog TV signal? | ||
| Will the Feb. 2009 DTV conversion date be delayed? | ||
| Are we better off with analog TV than DTV? | ||
| Manually getting TV signals from a DTV converter box | ||
| 090111tech-004 | Mel's Email #01 The EI&Z Discussions feedback to date | |
| Dick's "Impedance Light bulb" example | ||
| Being a fugal ham radio operator pays off | ||
| Mel's Email #02 Looking at sloping wire (TVB) antennas |
January 18, 2009 Show
| 090118tech-001 | Can I intercept the ID that a CDMA cell phones sends to a cell site? | |
| Using Blue tooth to identify your cell phone | ||
| Measuring current to identify your cell phone | ||
| Anti-Cloning software used to battle against cell phone theft | ||
| SimCard duplication with a laptop | ||
| 090118tech-002 | Using a cell phone as an RF ID device | |
| Cell phone duty cycle and battery drainage | ||
| Measuring cell phone output with a spectrum analyzer | ||
| GPS technology that's integrated in cell phones | ||
| How much power can a black box with three large resistors and dummy load take? | ||
| 090118tech-003 | Evaluation and uses of Bird Dummy Loads | |
| Some valuable uses of a light bulb used in a series circuit in the ham shack | ||
| Debate over QST VHF Spring 2009 article "DTV requires more power than analog " | ||
| Viewing DTV pilot tones on a network analyzer | ||
| Low insertion loss sealants for coax connectors | ||
| 090118tech-004 | 700 Mhz cut-off filters for DTV reception revisited | |
| Low insertion loss sealants for coax connectors revisited | ||
| Terminating 750 Hard Line and LMR 400 cable | ||
| 3am DTV reception reports | ||
| Sensitivity of a DTV receiver on www.vtechnology.com and www.rabbitears.info |
| 090125tech-001 | Using a Screwdriver antenna as a base antenna | |
| DTV converter box attenuator effects | ||
| DTV equalization in the RF statement | ||
| FFE and DRF in relation to DTV transmission | ||
| Discussion of Gary Spignoli's DTV pilot tone report | ||
| Low Pass 700Mhz filters revisited | ||
| 090125tech-002 | Measuring DTV bandwidth in relation to noise floor and signal ratio | |
| Will the DTV conversion date be delayed? | ||
| What NYC TV stations NOT to use for testing your DTV converter box | ||
| Dish Network dish loses its lock on a signal after six minutes - why? | ||
| MELS EMAIL 01: Sloping wire (TVB) antennas revisited from 090111tech-004 | ||
| 090125tech-003 | Is the TVB similar to a FishBone antenna? | |
| Discussion of the KU4AB antenna | ||
| Tuning horizontal and vertical elements with the correct delay | ||
| Faraday rotation and the E skip and F skip | ||
| Using power dividers with phased antennas | ||
| Discussion of the Halo Loop / Vertical Polarity 1/4 Wave combo antenna | ||
| Discussion of the KU4AB antenna revisited | ||
| Examples of antennas that have circular polarization in all directions | ||
| 090125tech-004 | Discussion of the Lynden Black (sp?) array antenna design and polarization | |
| Multi path with 2 or 3 hops and its effect on fade | ||
| Z1BPU web site about how signals split in the ionosphere | ||
| Performance of wide-spaced beams vs. narrow-spaced beams | ||
| Linear and circular antenna fading |
| 090201tech-001 | The history of the Collins KWM1 transceiver | |
| Repairing the coax of Sirius satellite receiver antenna | ||
| Examining a microwave oven magnetron magnets | ||
| A magnetron load pull test explained | ||
| Dick shares his "hen in a microwave test" | ||
| How the size of a microwave's size effects performance | ||
| 090201tech-002 | Does lead in a cups glazing effect temperature performance in a microwave oven? | |
| Soufside (sp?) cooking - a new way of cooking | ||
| How water behaves in a microwave oven | ||
| Measuring the speed of light with a microwave oven | ||
| Lead and other poisons in municipal water supplies | ||
| How effective are water filters? | ||
| Misunderstandings of RF radiation | ||
| 090201tech-003 | RF radiation created by the Ballistic Missile Early Warning System | |
| How radiation effects human DNA | ||
| RF induced thermal heating as a cure for cancer | ||
| U of San Diego research report on the effect of RF exposure | ||
| The effects of RF exposure on heart fibulators and stints | ||
| Consumer Reports Jan 2009 article on Sodium Content in American Food | ||
| Lead dust from grinding pc board components | ||
| 090201tech-004 | The dangers on lead solder | |
| MELS EMAIL 01: What size and color wire do I use for a stealth HF antenna? | ||
| Antenna challenges for apartment dwellers | ||
| Reviewing the CAC antenna | ||
| Fluorescent lights and radio interference |
February 8, 2009 Show
| 090208tech-001 | Examining DTV reception and selective fading from different NYC TV stations | |
| TV station antennas and multi path | ||
| DTV switchover date is postponed | ||
| Range of analog WNET Ch.13 vs. digital WNET Ch.13 | ||
| Examining antenna pattern measurement and its relation to polarazation | ||
| Depolarization Effect explained | ||
| The KCRC Meeting building at Floyd Bennett Field is shutting down | ||
| 090208tech-002 | Dick's article on UHF Antenna/Radiometry in QST 2/76 | |
| Operational amplifiers and differential voltage | ||
| Examining fluorescent lights and radio interference revisited from 090201tech-004 (above) | ||
| How LED lights work | ||
| How far do LED lights radiate? | ||
| LED QRM at traffic intersections | ||
| FCC Part 15 Standards for radio emissions | ||
| 090208tech-003 | MELS EMAIL 01: What is the proper way to use a light bulb as a dummy load | |
| MELS EMAIL 02: How to find a good value in used ham equipment. | ||
| Buying above vs. buying below "Blue Book" value | ||
| 090208tech-004 | Review of Mel's Email rules | |
| Mystery SSB "ding ding" sound heard on 40m and 80m | ||
| MELS EMAIL 03: How good are older rigs' selectivity? | ||
| QST Feb 2009 article "Keeping current with antenna performance" discussed | ||
| Does the SWR meter have the final say in antenna performance? | ||
| RF Amp meter vs. an SWR meter | ||
| How do you know when a LED light reaches it maximum brightness? |
February 15, 2009 Show
| 090215tech-001 | DTV modulator signal transmission through closed circuit system | |
| Is it better to place a meter at the antenna? | ||
| Project suggestions for a ham class of 30 | ||
| Venus is presently the brightest star in the night sky | ||
| The misunderstanding of a telescope's gain | ||
| The future of software defined radio | ||
| The need for more RF engineering courses for graduates and undergraduates | ||
| The small size of surface mount components | ||
| 090215tech-002 | Using a network analyzer as an "antenna laboratory" | |
| The need for more RF engineering courses for graduates and undergraduates revisited | ||
| SPACE REPORT w/WS2N Paul Satellite collision / Lunar Orbitor update / Rotary Joint failures | ||
| Buffalo NY air crash: Airplane icing - how common is it? | ||
| 090215tech-003 | MELS EMAIL 01: Installing effective dipoles in attic crawl spaces | |
| Good stealth antenna info in "Practical HF Radio Command and Control" by AS Christianson | ||
| What happens when you transmits on HF to a "line of sight" station? | ||
| MELS EMAIL 02: How good does a Fan Dipole perform on 80m? | ||
| 090215tech-004 | Examining the Turnstile antenna and the Wilkinson Hybrid antenna | |
| The role of a Wilkinson power divider | ||
| The Cho (sp?) Wheeler Criteria | ||
| 090215tech-005 | ||
February 22, 2009 Show
| 090222tech-001 | WADX and the era of the spinning disk TV technology | |
| Looking back at Farnswort, Sarnoff and the early years of TV | ||
| TV technology circa 1939 | ||
| Early days of TV programming up to Telstar technology | ||
| Hams share their first experiences with TV and TV/electronic repair | ||
| tubecollectors.org/tubecall.htm good source of tube images and tube magazine | ||
| Basics of Directional Couplers | ||
| 090222tech-002 | K5RMG.org good source for directional couplers | |
| Power handling capabilities of directional couplers | ||
| Directivity principles and directional couplers | ||
| Review of a report on Coupler Coefficient | ||
| Tom Mullen and directional couplers | ||
| Directional Couplers in relation to transmission lines and auxilary lines | ||
| 090222tech-003 | Building a directional couplers with 2 parallel lines | |
| Signal behavior in a waveguide | ||
| Wireless Design Feb 2009 good source for directional couplers | ||
| Making an antenna from Home Depot's plumbing department | ||
| Looking back at the coffee can antenna | ||
| 090222tech-004 | MELS EMAIL 01: Continuing with tinfoil stealth antennas from 090215tech-003 | |
| MELS EMAIL 02: Using copper piping a ground | ||
| MELS EMAIL 03: What's the best direction to bend the end of a dipole? | ||
| The Brown and Woodward charts a good source for wire and elelment dimensions | ||
| Kraus' theory on the dipole | ||
| 090222tech-004 | How do adjust Yagi element so you can work a lower part of the 70cm band | |
| 090222tech-005 | MELS EMAIL 04: Where do you put coils in 1/4 wave 80m dipole? | |
| Can you loop the ends of an 80m dipole instead of making coils? | ||
| MELS EMAIL 05: Will ham radio have a band in the ultraviolet light range? | ||
| The overlapping grey area of radio waves and optical waves |
March 1, 2009 Show
| 090301tech-001 | How do I cut the elements of a 22' 420Mhz yagi so it can work at a higher frequency? | |
| QST February 76 good article on a radiometry antenna range | ||
| The DL6WU yagi design formula | ||
| Experimenting with placing foil between a yagi elements | ||
| 090301tech-002 | Gamma fed antennas | |
| The challenge of tuning Halo antennas | ||
| Buying and experimenting with dopler antennas | ||
| Transmitter hunting with dopler antenna equipment | ||
| SPACE REPORT w/Paul WS2N ISS new solar panel / High res pictures of Mars | ||
| Finding the tuned frequency on a long multi element yagi | ||
| 090301tech-003 | K1WHS K1FO websites are good sources for large yagis | |
| MELS EMAIL 01: 6m & 19m ionospheric noise vs. UHF galactic noise | ||
| MELS EMAIL 02: How much time does it take to put together an Elekraft K2 or K3 | ||
| Kenwood tech support vs. Icom tech support | ||
| MELS EMAIL 03: Can I make a vertical 1/2 wave for 15m without needing radials | ||
| 090301tech-004 | Are there SWR changes between vertical and horizontal antennas? | |
| The reliability of DC brushless motors | ||
|
Show# |
Air
Date |
Audio Segment |
First
Topic Discussed in Segment |
March
8, 2009 |
Examining
DTV signal signatures on a network analyzer |
||
WNET
TV DTV video bandwidth |
|||
How
does a radio signal travel through space? |
|||
Measuring
160m and 80m antenna radiation efficiency |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
March
15, 2009 |
Are
CBS and PBS broadcasting DTV yet? |
||
Why
we give long answers to TechNet questions |
|||
Mel's
shares how he got an ear full from a antenna manufacturer engineer |
|||
Making
antennas for 160m |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
March
22, 2009 |
Transmitting
on a super conductive wire antenna |
||
heavensabove.com
to track the ISS |
|||
MELS
EMAIL Ways to bend the end of a dipole |
|||
VE3CV
elevated feed verticals |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
March
29, 2009 |
Why
aren't there anymore TV picture tubes on the market? |
||
Dick:
Skeptical of latest antenna modeling programs |
|||
The
Drake TR6 and clover leaf antennas |
|||
MELS
EMAIL: Zig Zag matching networks |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
April
5, 2009 |
What
equipment is needed to contact satellites? |
||
Variations
between DTV signal "dips" |
|||
Yagi
boom elements for Vertical and Horizontal Polarization |
|||
Dangers
of installing a relay in the engine compartment |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
April
12, 2009 |
HF
frequency measurement tests scheduled |
||
Impedance
matching with yagi elements |
|||
Elevated
zig zag fed HF verticals (ie Titan DX) |
|||
Surge
impedance |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
April
19, 2009 |
All
about grounding |
||
Freq/signal
tone shifts switching between two antennas |
|||
Infinitesable
(sp?) dipole discussion |
|||
The
practicality of a manned mission to Mars |
|||
| QSOs from 146.850 repeater Long Island NY | |||
April
26, 2009 |
Full-size ladder line and G5RVs | ||
Transversing
of planes from one polarity to another |
|||
Copper
oxide rectifiers |
|||
MEL'S
EMAIL: Can I put 2 HF mobile antennas end to end to make a base HF dipole? |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
May
3, 2009 |
High
stability oscillators |
||
Charging
lead acid batteries |
|||
MELS
EMAIL: What is a Hex Beam? |
|||
MELS
EMAIL: Can a 20m antenna fit in a 10 foot square space? |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
May
10, 2009 |
HF
Propagation and the Sun Cycle |
||
800v
power supply chokes |
|||
How
good is Crimping? |
|||
MELS
EMAIL: Why does an SWR meter change along a transmission line? |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
May
17, 2006 |
Double
Precision feature in a calculator |
||
Dish
wind load at the top of antenna tower |
|||
What
NYC repeaters rebroadcast the space shuttle |
|||
Helical-wound
antennas |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
May
21, 2009 |
Wall
dimmer switches revisited |
||
Review
of different DTV Converters |
|||
DTV
filters used at the transmitter |
|||
Oscillator
"Lock and Roll" |
|||
May
31, 2009 |
How
does a dipole handle concurrent transmitting and receiving signals |
||
Field and Wave Engineering courses have to be done better |
|||
The
nature of not so good looking DTV images |
|||
The
importance of wanting to know why and how things work |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
June
7, 2009 |
Making
a ground plane on a fiberglass car roof |
||
High
voltage experiments using sharp metal points |
|||
Voltage
Plates |
|||
Global
economy effects on the US |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
June
14, 2009 |
Day
2 of DTV across America |
||
Zooming
and cropping the DTV display |
|||
Yagis
that are vertically polarized on a horizontal mast |
|||
Comparing
DTV signals from WCBS and WPIX |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
June
21,2009 |
Yagis
and variable capacitors |
||
Nasty
things in the way transmission lines work |
|||
Using
a tuner as a band pass filer |
|||
Close
Caption on DTV |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
June
28, 2009 |
Restoring
boat anchors by use of a dishwasher |
||
Efficiency
of solar cells |
|||
SPACE
REPORT: Hubble repair update |
|||
Weapons
Replaceable Assemblies |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
July
5, 2009 |
Digital info being transmitted over AM broadcast radio channels | ||
Experiments
conducted in Anechoic Chambers |
|||
Performance
and the diameter of a yagi radiator |
|||
Modifying
a CB mag mount for ham use |
|||
4545444 |
4QSOs
from 146.850 repeater Long Island NY |
||
Reel
1 starts at 11:20 |
July
12, 2009 |
Antenna
efficiency and high return loss (1hr 30mins) |
|
Input
and Output impedance of an amplifier an dB ratio |
|||
What
causes lagging in phase or leading in phase |
|||
SPACE
REPORT: Fuels used on the lunar module |
|||
July
19, 2009 |
Blue
emitting diode's late arrival |
||
The
effects of using a notch filter |
|||
HF
antenna take-off angles |
|||
Apollo
14 color wheel camera |
|||
July
26, 2009 |
The
real locations of NYC DTV stations |
||
Supplemental
transmitting DTV antennas for TV stations |
|||
Antenna
guy wires and TVI |
|||
Pros
and Cons of ROHS solder |
|||
4QSOs
from 146.850 repeater Long Island NY |
|||
August
2, 2009 |
Improving
the AM audio on 70m |
||
The
"liquid" in Liquid Displays |
|||
Antenna
gain equations |
|||
Yagi
phase shifting |
|||
4QSOs
from 146.850 repeater Long Island NY |
|||
August
9, 2009 |
The
coax inside a GAP vertical The Carolina Windham antenna comparison SWR vs Radiation efficiency Sprinklers activate when Txing RF energy in control circuitry RFI and the Balun Debate |
||
Cable
leakage effects on signal strength RF interference: Dealing with neighbors Cable leakage detection Jung's book "Operational Amplifiers" Analogdevices.com Audio Oscillators Life on Exoplanets Civilization stages on planets MELS EMAIL: Converting an Am amp into a SSB amp |
|||
What
makes a good transformer |
|||
August
16, 2009 |
Sprinklers
go off when I transmit |
||
Using
a 2 element co-linear 2m antenna on 70cm |
|||
Deviation
adjustments for the Icom 208 |
|||
Examples
of unique CW DXCCs on 30m |
|||
August
23, 2009 |
Cable-eating
squirrels cause reception problems |
||
Crystal
Diode Detector and Absorption Wave Meters |
|||
Book:
"13 Things That Do Not Make Sense" Pioneer 10 mysteries |
|||
Heating
swimming pools with solar power. Fractal Antennas |
|||
August
30, 2009 |
The
history of the "Wow" signal |
||
Book:
"13 Things That Do Not Make Sense" |
|||
Unfounded
RF Radiation scare in France |
|||
Unfounded
RF Radiation scare in Bayville, NY |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
September
6, 2009 |
Cell phone
pops popcorn (hoax?) RF interference and electronic susceptibility From sprinklers going off when Txing to doorbells ringing Troubleshooting interference problems |
||
| Troubleshoot CATV cable
leakage The Cumulative Leakage Index SPACE REPORT |
|||
| Setting up camp on
the Moon's South Pole FRACTAL ANTENNAS: Langsdorf Antenna |
|||
| MELS EMAIL: FRACTAL ANTENNAS: The Minkowski Island design | |||
September
13, 2009 |
The HW202 power supply | ||
| Using a TV to
measure field sensitivity with Joe W2HYY. Measuring cable leakage after landscaper cuts coax. Measuring intermittent signals with two independent sweeping devices. |
|||
| 109-120Mhz
wireless microphones- legal? SPACE REPORT: Hubble repair update. FRACTAL ANTENNAS: Reexamination of the Landsdorf antenna. |
|||
| FRACTAL ANTENNAS:
The Landsdorf antenna vs. the Log Periodic. FRACTAL ANTENNAS: Patterns of array antennas. MELS EMAIL: HFing on Mars? |
|||
| QSOs from 146.850 repeater Long Island NY | |||
September
20, 2009 |
Working on Cantennas Cleaning VCR video and audio heads All about VCR heads |
||
| Troubleshooting
VCR tape transport systems VCR heads and VHS HiFi Review of articles discussing perceived risk of cell phone tower radiation |
|||
| The Bayville
NY RF radiation hysteria. TechNet hams speak out to take action against anti cell tower advocates MELS EMAIL: What is the best way to feed a dipole: Twin Lead, Ladder line, of Coax? |
|||
September
27,2009 |
Antenna manufacturers
SWR claims. PI Networks, variable capacitors and rotary inductor tuners. Www.buddypole.com and accessories with nanophosphate battery technology. Review of the NEAT Conference. QST 9/09 Article on power analyzers for battery charging systems. Proper stacking distance for a Halo antenna. |
||
| Trying to find true
north with a GPS. Earth tilt and the effects of the Sun's exposure. Good web sites showing before and after Hubble's repair. Good astronomy freeware. |
|||
| MELS EMAIL: Silver
plating and HF coils. How much would Collins equipment sell for today. Collins contribution to WW2 The infamous 813 tube and the BC221 frequency meter. The birth of the microwave oven. The days of the acorn tube. Renovators to the Floyd Bennett Field. MELS EMAIL: Dipoles |
|||
| Tinning the braids
of a coax. Crimp or not to crimp a cable? NYC DTV receiving signal update. MELS EMAIL: Turning a a TV antenna to a vertical position, and circular polarization. |
|||
October
4, 2009 |
Salvaging 18' fiberglass
dishes. |
||
The
mysterious signal on 146.575 Mhz when the UN was active. SPACE REPORT: The search for water on the moon. A 2m repeater on the moon? Troubleshooting the LIMARC repeater. (TechNet ends early) |
|||
QSOs
from 146.850 repeater Long Island NY |
|||
October
11, 2009 |
Does the twin lead
of a G5RV need to be in a straight line? Differential attenuators. Using active attenuators during a fox hunt. What makes a good fox hunter and what equipment is good to use? What happens when radio waves hit a human. |
||
| Charts on cell phone
absorption rates now appearing in magazines. Germany claim cell phone industry workers "take home" radiation to their families. The danger of soldering fumes. Fox hunt attenuators revisited. Lights in the night sky appear over a LIMARC member's house. SPACE REPORT-NASA crashes craft into moon's South Pole. Update on VCR head cleaning. |
|||
October
18, 2009 |
Examining
the director, reflector and elements of a Yagi. Replacing the last element on a Yagi with a coat hanger- what would be the performance? Measuring the charactaristic impedance of a transmission line. Electronphonic sound. Hams share their experiences of lightning strikes. |
||
| 10' mast on a ham's
bicycle that got struck by lightning. The danger of inhaling ozone and other substances. CBS's 60 Minutes segment on a ham using RF energy to battle cancer cells. |
|||
| Is there any 9913 performance
loss when mixing connecting it with different types of coax. How to get cheap 750 hardline. Dick and Mel Linux/Windows email problems. SPACE REPORT: Update on Polar South Pole water mission. Update on the Balloon Bay hoax. MELS EMAIL: The great debate over antenna height. |
|||
| The benefits
of a vertical 1/2 wave dipole. Rotating from horizontal to vertical with the Cushcraft MA5V. Using the Kenpro KR500 rotator with the Cushcraft MA5V |
|||
| QSOs from 146.850 repeater Long Island NY | |||
October
27, 2009 |
Extending
a Wavetek serivce monitor to 1.2 Ghz. High marks using a Bowtie antenna for DTV reception. Placement of preamps for DTV reception. Radome antennas and water damage. The quality (or lack of) of foam filled cable. How to get cheap 750 hardline. |
||
| How ground testers
work. SPACE REPORT: Water on the moon update. Mel's handcrank wooden Dialectic Constant box. |
|||
| Scarce documentation
on use of vertical dipoles. Artificial dialectic material with negative refractive index. Lots of radar pulses heard lately on 449 Mhz. MELS EMAIL 01: Letter from a son of a store owner from "Radio Row" MELS EMAIL 02: What is the burnt out piece inside of a Gonset Stripline Unbalanced Tuner. |
|||
| Review of the recent
LIMARC flea market. Dick's ham friends who now has a windmill fram next to his repeater. FRACTAL ANTENNAS: Article from 10/09 Antennas and Propagation from th e IEEE about the Landsdorf antenna. |
|||
| QSOs from 146.850 repeater Long Island NY | |||
November
1, 2009 |
Youtube
video on Electromagnetic
Reactive Armour. Receiving DTV carrier frequencies on a omnidirectional antenna. Dick shares when using different polarizations on the NY Thruway. Analysis of cross polarization and Faraday Rotation. Is it possible to transmit with a beverage antenna? |
||
| Beverage antennas performance
vs. other antennas. Brooklyn hams who moonbounce. The conductivity of water. When parts of NYC were on DC current. |
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| A look at Mel's antique
books including one on The Edison Company. Keeping water out of cables. Comparing two closely mounted repeater antennas. The job requirements for a Edison Co wiring person. Review of the NYC Marathon. |
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| In search for
Motorola amp schematics and a look at www.repeater-builder.com ARCS amd K1FO products. April/May 2009 QST article on amplifier protection techniques. Mel gives high marks for RF amplifiers by ARRL. Air cooling vs water cooling. 6360, 4CX250R, 6188, and 4CX250D amplifier tube discussion. |
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November
8, 2009 |
Extracting
a jammed screw/lug bolt. "Nut Busting" products. 091101tech-003 update on Comparing two closely mounted repeater antennas. Internet hack causes Brazil power outage. Using APRS with balloons. Sending a radio-controlled airplane across the Atlantic. |
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| How much amperage
can you put through a certain guage of wire. Can you use CAT5 cable for DC power? CAT5 vs CAT6e cable. Using coax to wire a computer network. Characteristic impedance and physical design of CAT5e cable. |
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| All about Turbey (sp?)
bits and 64 Quam (sp?). Group delayed distortion. DTV converter crashes when receiving two simultaneous signals-why? Is there a scanner module that enables DTV audio listening? The future of the 700Mhz region. Are DTV frequencies purposely programmed to be off-set? |
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| Are the new Homeland
Security frequencies now going to be NFM? Light modulation from stars and their planets. MELS EMAIL 01: How do I find the correct transistor parts for electronic projects? |
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| QSOs from 146.850 repeater Long Island NY | |||
November
15, 2009 |
Where
do you place your atomic clock for best reception? Dos and don'ts when installing a screw driver antenna. Capacitor reactance explained. Law of conservation and energy explained. Over-reliance on SWR and S meters. WAAS and GPS reception. |
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| GPS technology used
in air travel. The Geocaching hobby. All about LITHARC. Fresnel Zone and multi path. The present state of RF Engineering education. SPACE REPORT: NASA finds water at moon's pole. Update on the Dawn Spacecraft to the asteroid belt. |
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| N2XJN shares his career
in resonant acoustic technologies. Designing U shaped channel Yagi elements. Mel and Dick repeat rules for the emailing the Technet. MELS EMAIL 01: Replacing a 3-tap bleeder resistor. |
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| What is the best method
of operation when using a screw driver antenna. www.k0bg.com - good source for info on mobile antenna wind resistance. Mel talks about mobile transcievers he owned. MEL EMAIL 02: How do you shop for aluminum piping to make antennas? Examining HF vertical antennas |
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November
22, 2009 |
Ham
frustrated over his comments were rebroadcasted from amateurradio.tv Do you need a tuner when using a solid state amplifier? Solid state SWR tolerance vs Tube SWR tolerance. W2EEO 4th generation ham signs into TechNet. S Meter reading and S Meter sensitivity. |
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| What is a Scotch S
Meter? Examining The KAY Company step attenuator. Why is there WiFi restrictions in Israel? RF radiation scare news - this time from France. Examining The KAY Company step attenuator -revisited. Is it safe to use a duplexer with a step attenuator with the Kenwood TS2000? When a signal generator is "dirty" The advantages of buying good used equipment. When a signal generator is "dirty" revisited. |
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| RF radiation scare
news - revisited. Resonant frequencies (2.4 Ghz) that effect the human body. The American diet vs the French diet. Examining the salt content in Kosher food. The unhealthy American lifestyle. Resonant frequencies (2.4 Ghz) that effect the human body. |
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| Focusing RF Energy,
multipath, and reflection The need for more research on RF insertion depth. The 94Ghz RF Crowd Control Gun. Specific Absorption Rate explained. 900 MHz transmitters being installed on water meters. Electric standards for alarm systems. MELS EMAIL 01: Update on the bleeder resistor email from 091117tech-003. MELS EMAIL 02: Can I use a zip cord to make an antenna? |
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| QSOs from 146.850 repeater Long Island NY | |||
November
29, 2009 |
Where
does one donate classic Tektronix 551, 556 dual beam scope equipment? Tektronix 551, 556 plugins. Will dropping a wire from a 2nd story window to the sidewalk work as an antenna for a Yaesu 817? Yaesu 817's delicate final stage. Using an old TV antenna antenna with a tuner and a Yaesu 817. Hot air soldering techniques on surface mounts. How to use a microscope's gain. Unsoldering components from a board. ESSD's precautions |
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Precautions when
wearing a wrist grounding strap. |
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All
about the Toyota full vehicle acceleration recall- how it happens and
how to survive it. |
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| When and how do you
change your oil and rotate your tires? Squelch Tails and Motorola's "Anti-Squelch" feature. |
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December
6, 2009 |
Increasing
the output wattage of a 6m transistor transmitter, and how to find the
parts. 6m transistors for amplifiers. Transistor class grades. 50.10 Mhz data streams - what are they? Testing a power supply's choke. Repairing a PSD30S cathode resistor. |
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| A ham wants to add
400Mhz elements to a 20 element 2m Long John beam. K1FO yagi calculator (found in the QST archives) good source for building yagis. Installing a floppy drive on a a new PC - Do I use the CMOS to recognize it? N3FJP.com good source for contesting software. Installing a floppy drive on a a new PC - Do I use the CMOS to recognize it - revisited. A ham calls in from 90 miles away. 9913 vs 9914 cable. 9913A vs 9914 cable. Continued discussion on the Toyota full vehicle acceleration recall revisited. |
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| How do you stop a fully-accelerated
car? How do you start a DStar repeater? |
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| What is DStar
and a DStar "hotspot?" The Icom ID800 DStar rig. Tri-state area DStar repeaters. Can simultaneous QSOs take place on a DStar repeater? Wikipedia.com good source on info on DStar. MELS EMAIL 01: How do you modify an antenna for a solid-state amp the won't require an antenna? (from 091122tech-001) |
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| QSOs from 146.850 repeater Long Island NY | |||
December
13, 2009 |
Conclusion
regarding the Toyota full vehicle acceleration recall. The unfounded fear of cell phone RF radiation. A ham has a 220v European tape recorder- How do you change the transformer winding so it will work on 110V? Transformer winding and phase. Voltage doubler rectifier networks. |
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Could you install
a DC jack in the 220v tape recorder? |
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| The technology used
to look at Mar's underground. Follow-up regarding the Toyota full vehicle acceleration recall. |
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| Faulty carburetors
also can cause a run-away engine. MELS EMAIL 01: How do you fix a missing trap on a Compact Beam? |
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December
20, 2009 |
Inductive
reactance question regarding the conversion of a 220v tape recorder to
110v - first discussed on 091213tech-001. The cost of repairing the 200v tape recorder buy purchasing a drive circuit. Cyclo converters that are found in newer air conditioners. Naturalization of the final circuit. THE TECHNET DIRECTIONAL COUPLER DISCUSSION Inside a directional coupler and how it rectifies a network. |
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THE
TECHNET DIRECTIONAL COUPLER DISCUSSION Cont The directional coupler debate. What happens when you going down in frequency with a directional coupler. The purpose of a Return Loss Bridge. The concept of a Zeppelin antennas. |
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Yaesu
817's low tolerance of high voltage. Mods for the Yaesu 817 QST June 2005 good article on Yaesu 817 mods. Antennas to use for QRP. Yaesu 817 mods in detail. How to make a QRP ladder-line folded dipole antenna (Found on the W2IK website) Science News Dec 5, 2009 article on terrestrial lightning storms. Are mass extinctions linked to gamma ray bursts? Precautions when back feeding a jumper from a portable generator |
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What
causes Eddy (Sp?) currents? THE TECHNET BALUN DISCUSSION PT 1 Grenela baluns. How a Yagi director is similar to a balun. How RF Chokes are similar to a balun. An antenna with a balun VS. an antenna without a balun. How baluns came along |
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QSOs
from 146.850 repeater Long Island NY |
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December
27, 2009 |
Why
aren't high-powered solid state amps on the market anymore? Stories of hams having high-powered mobile amps. SPACE REPORT- Future NASA space missions. |
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SPACE
REPORT- The Juno space mission. In search of W2OTA ATV ham. High voltage tubes and filament voltage. Do coax have to be replaced every three years? Ham says he's apprehensive to put 1Kw through his Windham and G5RV antennas. The performance of a G5RV in an inverted V. 28.389Mhz is the frequency for the Sunday Night 10m Net. The left side of the dipole vs. the right side of the dipole. How harmonics play a role in G5RV performance. THE TECHNET BALUNS DISCUSSION PT2 |
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THE
TECHNET BALUNS DISCUSSION PT2 cont. |
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THE
TECHNET BALUNS DISCUSSION PT2 cont How ferrites playa role in baluns. How baluns handle heat from inefficiency. A Yagi's driven element has some characteristics of a baluning device. W3DZZ antenna designs Dick: "Do not saturate the iron" |
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QSOs
from 146.850 repeater Long Island NY |
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