Here is another gem

[quadcalc.htm]

 

Coax Calculator

Usually I would put these directly on the site instead of a link, but this calculator is rather cool.  It is designed for you to select your coax, then enter your desired frequency and length.  It will calculate your dB loss!  Try it out - - - http://www.timesmicrowave.com/cgi-bin/calculate.pl


Hand-Held Shootout

Since the release of the VX-7 there has been a great deal of talk about it.  There are a few that are faithful to ICOM and Kenwood, so in all fairness below find a comparison chart for 4 very popular multi-band radios.  All specifications were gathered from the manufactures web-sites.

Radios included in this comparison:

   

Feature

 

VX-5R

VX-7R

TH-F6A

IC-T90

Street Price
(as of Feb 2003)
  $209 $289 $329 $249.95

RX Range

 

0.5 – 16 Mhz
48 – 729 Mhz
800 – 999 Mhz
Cellular blocked

0.5 – 999 Mhz
Cellular blocked

0.01–1300Mhz
Cellular blocked

0.495 – 999.990 Mhz
Cellular Blocked

6M TX

 

5 Watts

5 / 1 Watt (FM/AM)

 

5 Watts

2M TX

 

5 Watts

5 Watts

5 Watts

5 Watts

220Mhz TX

   

1.0 Watts

5 Watts

 

440Mhz TX

 

4.5 Watts

5 Watts

5 Watts

5 Watts

Emission Types

 

F2 / F3

A3 / F2 / F3

F2 / F3

F2 / F3

Number of Simultaneous bands

 

1

2

2

1

Priority Channel

 

1 – Any of 220

1

1

1

Backlight

 

Red

Amber

 

Orange/Grn/Red

Channels

 

220

900

435

555

Alpha Tags

 

8 Characters

8 Characters

8 Characters

8 Characters

Battery

 

1100ma Li-Ion

1300ma Li-Ion

1550ma Li-Ion

1300ma Li-Ion

Battery Life (avg)

 

6 to 12 Hours

5 to 15 Hours

6 to 20 Hours

6 Hours

Alkaline Pack

 

2 AA Cells

4 AA Cells

4 AA Cells

2 AA Cells

Computer Programmable

 

ADMS/EVE/VX5 Commander

ADMS (TBR)
VX-7 Commander

Kenwood
MCP

CS-T90A
Clone Software

Antenna Connector

 

SMA

SMA

SMA

SMA

Weight

 

9.0 oz

9.2 oz

8.8 oz

8.5 oz

Charge time

 

6 Hrs

6 Hrs

   

Colors Available

 

Black/Silver

Silver/Black

Black

Black

Water Resistance

 

Minimal

30 minutes @ 3 feet

Minimal

Minimal

Audio Output

 

400mW @ 8ohm

200mW @ 7.2 Volts 400mW @ 13.8 Volts

 

200mW @ 8ohm


Boat Anchors!

Oh, the TARC Fest are so great....

 


Want to Have Some Fun?

It's time to build that antenna that you have always wanted.  Yup, that Yagi!  To get you started, use this nice little calculator to figure out a few of the dimensions.  Now the matching is up to you.  Get creative!

Frequency
Spacinginches
Reflector Lengthinches
Driven Lengthinches
Director Lengthinches

Yaesu Does it Again!

For those of you who fell in love with the Yaesu VX-5R and the VX-5RS and chose it for your hand-held of choice, will be happy to know that Yaesu is not going to allow their competition to get very far.  Here is a sneak-peak of the new Yaesu VX-7R!  Yes, it's a Quad Bander! They have opened up the receiver, and added 220!  And if you look carefully, you will see the word SUBMERSIBLE!

 

Yaesu VX-7R Quad-Band Transceiver

 
Specifications
  Vintage       2002
  FCC Cert'd    March 7
  Type          Handheld HT, 6m/2m/220/440
  Range         0.500-729 800-999 MHz
  Channels      ??? main
                 31 Smart Search
                 12 Home
                 10 One-touch
                 10 Hyper
                 10 Weather
  Banks         10
  Search Bands  20
  Steps         5/9/10/12.5/15/20/25/50/100 kHz
  Modes         AM, FM & WFM
  Priority      1 channel
  Conversion    Double (AM/FM)
                Triple (WFM)
  IFs           1=47.25 MHz (AM/FM), 45.8 MHz (WFM)
                2=450   kHz (AM/FM), 10.7 Mhz (WFM)
                3=1     MHz (WFM)
  Sensitivity   As listed in the manual:
                  0.5 - 30 = 3.0µV  (S/N AM)
                  30  - 50 = 0.5µV  (SINAD FM)
                  50  - 54 = 0.16µV (SINAD FM)
  Selectivity   As listed in the manual:
                  AM/FM = -6dB  @ 15kHz
                          -60dB @ 35kHz
                  WFM   = -6dB  @ 200kHz
                          -20dB @ 300kHz
  Scan          ?? channels/second
  Search        ?? steps/second
  Audio         200mW @ 7.4V
                400mW @ 13.8V
  Current       150mA single band, Rx
                200mA dual band,   Rx
                 55mA single band, quiet
                100mA dual band,   quiet
                 25mA single band, saver
                 50mA dual band,   saver
                400µA        APO
  Power         7.2 - 13.8 V,
                Lithium-Ion (FNB-8LI)
                2 x AA (FBA-23)
                DC
  Size          60(W) x 90(H) x 28(D) mm
                2.4(W) x 3.5(H) x 1.1(D) in
  Weight        250g (8.8oz)
  Interfaces    SMA, earphone/SP
  Antenna       SMA, 50 ohm, unbalanced
  Accessories   Antenna
                Quick-draw belt-clip
                Manual
                Handstrap
                NC-72B/C AC charger
                1300mAh LithIon battery
                Circuit diagram
                ---
                Optional CSC-88 Soft Case
                Optional FBA-23 2xAA battery case
                Optional SU-1 Barometric Sensor
  Features      Dual receiver
                DCS/CTCSS decode/search
                Power saver (5 levels)
                Backlight (keys and LCD)
                Rotary
                Rx light (4 colors)
                Alpha-tags (8 chars)
                Auto-store (Smart Search)
                Preprogrammed weather
                Weather Alert (optional?)
                Spectrum Analyzer (± 60 chan)
                Freq counter (± 100 MHz)
                Attenuator (20dB)
                Auto power-off
                Memory mask and skip
                Preferential memory scanning
                Dual watch (mem/mem or mem/VFO)
                Auto backlight on scan stop
                Battery voltage indicator
                Time of day clock
                Time of day on/off timer
                Adjustable display contrast
                Adjustable backlight dimmer
                Internal temp readout
                Radio-to-radio cloning
                Set Mode (73 settings)


 

IC-706MKIIG - Base/Mobile Transceiver

Could things get any better?  I'm sure somewhere, somehow, someone has a complaint about this radio, but I've not heard it, yet.  Other than possible the display is not in full color?
Ultra compact HF/6 meter/2 meter/440MHz transceiver. Built-in DSP (Digital Signal Processing) too! The perfect rig for base OR mobile operations! This proven performer is the 3rd radio in our revolutionary 706 series.


ft90r-mc.gif (11343 bytes)

Okay, another popular radio.  The Yaesu FT-8100R.  It seems to be a great companion to the VX-5R right now.  

Well, I don't like to give negative reviews, so I will temper this one a bit.

The Radio is fantastic.  It performs well, the cross-banding and scan speeds are great.  There is a problem with the microphone or mike circuitry.  Alternator noise can be injected into the transmission though the microphone, not the power lines.  So, all the filtering you use just won't help.  Work on your car first.  Make sure your alternator / regulator / and diode trio is working. Next, the audio band-pass is less than perfect.  This is not a fault of the radio, just the mike.  If you like audio with no bass and top end clipped off a bit then you might just like this radio's mike.  I have listened to about a half a dozen or more 8100's on the air from quite a variety of voices.  If you have a higher pitched voice, tenor or female, then this mike would work well.

Next, this radio is a few years old.  There are a few features this writer would like to see.  To put it simply, I would like to see a mobile version of the VX-5, but a true dual-VFO.  Text-labels, voltage monitoring, auto response systems.  And we would still like to see an ESN.


Okay, yea I had to put in a new photo.  Here is a web-site to check out for the VX-5.  The purpose is the VX-5 and just about everything about it.  Click the photo to go there.

 

If you are looking for one of the best hand-held radios on the market, then you have found it!  The VX5R operates on 6meters, 2 meters and 70cm.  With lotsa bellz-n-whistles this little guy is a great performer.  Mil-spec case, Li-On battery, back-lit keypad, text lables, HF reception.  Aircraft, weather, police, and more.  There are other triple-band radios, and even a quad, but if you put them side-by-side you'll see what the fuss is about.


These RDF files were created with the idea of usage in Hillsborough County.  Though they contain some frequencies that are generic to region they should be considered a Tampa set.

VX5 RDF file.*     (Viewable format)
VX1 RDF file.*

 

Other RDF files of interest: (Provided for listening purposes only.)

Tampa AM/FM/TV     FRS                GMRS    The "Cape"    SWL   
Tampa Fire/Police
     Blue Angles   Marine    Trains     Thunder Birds

* RDF files require the use of the ADMS program from RT Systems.

Don't have a computer? Or just want someone else to do it?  Bring your radio to the TARC clubhouse.  We'll be glad to load the radio for you.  We will save your current file, if you want, so you can always go back to it!  What a deal!


Sometimes we need to find Larsen or Diamond or even compare against everyone else's antennas.  Well here is a compile set of links for antenna manufactures, so enjoy: