Showing posts with label Antenna. Show all posts
Showing posts with label Antenna. Show all posts

Monday, March 27, 2017

Free (Almost) Antenna

Just pay US ($3.50) or Canada ($2.50) shipping:

FREE SMA TELESCOPIC VHF/UHF DUAL BAND ANTENNA
YES! This antenna really is free, just pay shipping and handling. Due to the popular nature of this offer please allow 2-4 weeks for shipping...WANT IT QUICKER? FOR ONLY $4.99 WE WILL BUMP YOUR ORDER TO THE TOP OF THE QUEUE. JUST CHOOSE SOONER THAN LATER AS YOUR SHIPPING TIME!..Orders limited to one per person. Orders of more than 2 will be cancelled. LIMITED TIME ONLY*** YOU MUST BE A LICENSED AMATEUR RADIO OPERATOR TO TAKE ADVANTAGE OF THIS OFFER ***.*** INCLUDE YOUR CALLSIGN IN THE NOTES OF THE ORDER DURING CHECKOUT ***.*** ORDERS WITHOUT A VALID CALLSIGN WILL BE CANCELLED ****** CALLSIGN MUST MATCH YOUR NAME ***.Have you ever been on the fringe of your favourite repeater and wished you had just a little bit more power? Have you ever been out in the field working simplex and wish that you could pull in that weaker station a bit better? A 1/4 wave would do the trick, but why carry an extra antenna when you don't have to? Get the best of both worlds. Portability in "Rubber Duck" mode, extended range in 1/4 wave mode.
 
  • 136-174Mhz / 400-480Mhz
  • 16CM in "Rubber Duck" mode
  • 48CM fully extended

Thursday, September 8, 2016

Baofeng Tech: Nagoya NA-320A Triband HT Antenna

Nagoya NA-320A Triband HT Antenna ($17.99):

  • Certified Original Nagoya Antenna - with an exclusive manufacturing partnership with BTECH
  • New Release - May Require a Rubber spacer (included) and has an extended antenna cover to protect your radio SMA male base from the elements
  • Triband: 2m-1.25m-70cm; *Gain (relative): +2.15dBi; Watts: 10; Height: 17.7"; Connector: SMA Female; *Rated against typical stock HT antennas.
  • Compatible with all BaoFeng, some Wouxun, and some Kenwood Radios

Looks like a good compliment to a Baofeng Tech UV-5X3!


Monday, August 29, 2016

County Comm Dual Band Roll Up Antenna, Government Pack

First a PSA: Be careful deploying the antenna. Based on the images, decapitation is a real risk.

Always interesting stuff over at County Comm... Dual Band Roll Up Antenna, Government Pack ($47.50)*:
The DBJ-2 was designed by Ed Fong for easy deployment in the field to aid in extended portable two-way radio coverage. This antenna is extremely popular with Fire, Rescue, ARES, RACES and Military Contractors. 
The DBJ-2 is true “Dual Band” antenna and is available in two models for either Ham or Fire/Commercial Frequencies.
Ham Model: 144-148 MHz and 440-450 MHz
Fire/Commercial Model: 152-157 MHz and 460-470 MHz 
The “Government Pack” comes in a Nylon Antenna Bag and includes the antenna of your choice, 25’ of parachute cord (http://www.countycomm.com/550parapac.html) a 6’ extension cable, and adapters to connect to various manufacturers of portable two-way radios (Motorola, Icom, Yaesu, Vertex, Kenwood, Wouxun, Baofeng, etc). This includes BNC, SMA (male), SMA (female) and BNC to PL259 . 

Technical Specifications: 
VHF: 1/2 wave radiating element
Maximum power: 50 watts
SWR: less than 1.5 to 1 over a 3 MHz bandwidth and less than 1.7 :1 over 4 MHz bandwidth.
Gain: 2.1 dBi
Impedance: 50 ohms 
UHF: 1/2 wave radiating element
Maximum power: 50 watts
SWR: less than 1.3 to 1 over a 6 MHz bandwidth and less than 1.5 :1 over 10 MHz bandwidth.
Gain: 2.1 dBi (6db gain over a 2 meter J pole used at 450 MHz)
Impedance: 50 ohms 
Package Size: 7.75 x 8.75
Weight: 10 Ounces



Tuesday, July 12, 2016

Baofeng Tech Amazon Prime Day Deal: Antennas

These Baofeng Tech Amazon Prime Day Deals are now live*:
Nagoya NA-771 15.6-Inch Whip VHF/UHF (144/430Mhz) Antenna SMA-Female
Nagoya NA-24J 16.2-Inch Ultra Whip VHF/UHF (144/430Mhz) Antenna SMA-Female 
Nagoya RB-35 5/8 NMO Mount Magnet
If you don't have Amazon Prime, you can sign up for a free 30-day trial if want to take advantage of the deals from Baofeng Tech.

* Hopefully, these are live now. This post was scheduled based on the original times Amazon had given for the listing. I'll update if I learn otherwise.

Wednesday, July 6, 2016

Nagoya NA-24J Ultra Whip VHF-UHF Antenna

John reviews the new lightweight Nagoya NA-24J Ultra Whip VHF-UHF Antenna. He reports the performance is better than most stock handheld antennas, but the real differentiator is the weight:
"Here's where the NA-24J excels. The antenna element is less than half the thickness of the NA-771 and about 1/3 the weight. The 24J weights in at mere .3oz (8.5g) as compared to 1.0oz (28g) for the NA-771."




Wednesday, February 17, 2016

Magic Smoke

Sometimes the magic smoke escapes via the antenna...


Via reddit /r/amateurradio

Monday, February 15, 2016

Baofeng Tech: Antenna Connections

A commenter wanted "to know if that antenna has any kind of O-ring or seal between the antenna and NMO adapter." Here are some close-ups of all the connectors for both the Nagoya TB-320A tri-band antenna and the Nagoya RB-35 5/8 NMO Mount. I don't see any o-rings/seals - just the insulators, but the fit was very good on everything and all the connections locked up nice and tight.









Thursday, February 11, 2016

Baofeng Tech: Nagoya TB-320A Antenna

I got a delivery from Baofeng Tech yesterday, so I'm one step closer: Nagoya TB-320A tri-band antenna!

PRYME AL-800 Antenna System: Hans (PD0AC) Review

Reports of his retirement from ham radio were greatly exaggerated... Hans posted a review of the PRYME AL-800 Antenna System on the Chinese Ham Radio Equipment Google+ site:
"The PRYME AL-800 antenna system takes a whole new approach to the 'gain problem'. Instead of offering an antenna with a fixed length, the PRYME AL-800 is more of an antenna construction kit. 
What you get is a base with a connector of your choice (SMA, BNC) and two antenna extensions. One of the extensions is short and will perform much like any other helical antenna. The second one is a combination of two extendable whip antennas with a loading coil in between. The antenna will be 94,5 cm / 37.2 inches long when fully extended, which includes the base."

Sunday, February 7, 2016

Baofeng Tech UV-2501+220: Tri-band Antenna and Mount

I really like it when it appears that companies think things through. So if you are going to offer a tri-band mobile like the UV-2501+220, you should probably sell an antenna to go with it. And that's just what Baofeng Tech is doing. They are offering the Nagoya TB-320A tri-band antenna ($57.95) and Nagoya RB-35 5/8 NMO Mount Magnet ($22.99) - details of each below.

(EDIT: So apparently all the antenna and mount links go to the same place. You'll have to select antenna or mount on the Amazon page to see the details for each.)

Nagoya TB-320A - Fold-Over 39-Inch PL-259 Mount Triband 2m/1.25m/60cm (144/220/430Mhz) Antenna:
The Nagoya TB-320A is a 39 inch tri-band UHF (PL-259) mount antenna with up to 5.5 dB of gain. It is designed to be used with your mobile or base radio. An included SO-239 to NMO Adapter allows for flexible installation to both UHF and NMO set-ups.

Fold over design allows the Antenna to Fold-Over which allows you to easily put the antenna down in parking garages or in other places where height matters.

The Nagoya TB-320A triband is a 2 meter, 220 MHz (1.25 meter) and 440 MHz mobile antenna. It is a 1/4 wave on 2 meters providing 2.15 dB gain and a 1/2 wave on 220 providing 3.8 dB gain and a 2 5/8 wave on 440 MHz providing 5.5 dB gain. This antenna can handle up to 200/100/200 watts.

Included in the package is a SO-239 to NMO adapter.

Package:

1x Nagoya NB320A Antenna (PL-259 Base)
1x SO-239 to NMO Adapter




Nagoya Antenna magnet NMO mounts are premium quality magnetic antenna mounts with very good holding power. They are a heavy 2 lb magnet mount (durable hold) with a 3 5/8" diameter base, and are recommended for antennas up to 45 in. tall.

Package:
RB-35 NMO Magnet (18 Feet RG-58)
Rain Cap


So add the UV-2501+220 radio, the antenna, the mount - and you are ready to rock and roll mobile!

Wednesday, December 16, 2015

Wednesday, December 9, 2015

RatTail

I never had a rat tail, but my high school coach did ask me if my mother knew my hair was getting so long. Maybe it's time I got a RatTail.

Friday, November 28, 2014

Bucket Cross-Band Repeater

A cross-band repeater in a bucket project:
"The “Bucket Repeater” is a battery powered cross-band VHF/UHF repeater in a weather proof enclosure that can operate unattended for a week or more, and be remotely activated or deactivated from miles away as needed."



He uses a Puxing PX-UV973 for the radio and has a complete parts list.

Via AR-15 Ham Radio Forum

Tuesday, November 25, 2014

Emergency Antenna Platform System (EAPS)

I will see your Roomba and raise you an Emergency Antenna Platform System (EAPS):
"The Emergency Antenna Platform System was designed by Amateur Radio operators (Hams) to assist in providing emergency communications during times of need, specifically natural disasters that disrupt normal communications. During an emergency Hams can be called upon to setup an ad hoc communications post for a shelter or medical station, EAPS can be used to raise radio antennas to an optimal height using an available lamp post, flag pole, or most any vertical structure."

Tuesday, November 4, 2014

Antennas for Access Point

We had cause to open up an access point at work. I thought it was kind of interesting to see the 2.4 GHz and 5 GHz antennas (six total).



Better pictures and info here.

Thursday, October 2, 2014

Attic Antennas

A little surge of discussion about attic antennas on reddit here and here.

I've posted it a few time before, but my setup: