Amateur Radio gear

March 4, 2017
Atlas 215X solid state

82HPBy John ‘Miklor’ K3NXU

Not just a Power Upgrade
The new UV-82HP is not just a power upgrade, but a combination of all major features of both the UV82 and UV5R series in one package.

What’s in the Box
– The UV82HP
– Newer upgraded A-V85 Antenna
– 7.4V 1800mAh Li-Ion Battery
– Upright Charger and wall-wart
– Manual written in English
– Belt Clip
– Hand Strap

The radio sports all traditional features of the UV82 design, with the larger keypad buttons and the zero at the bottom of the number pad where it belongs, etc. It also is built using the latest generation chipset.

– The frequency range is the full 136-174.99 MHz, 400-520.99 MHz range.
– VHF output on the test unit clocks in at 7.3W with UHF at 6.0W
– The Dual PTT button is now an option that can be turned off. Previously only available with the commercial version (UV82C)
– Live On-the-Air audio reports are excellent.
– Alpha tags can be added with the required software below.
– The receiver sensitivity is still excellent.

So, What makes this version an upgrade?
– The original UV82 took a traditional UV5R, and added design features such as an upgraded case and Dual PTT switch. (comparison)
– Next came the UV82C which included options to synchronize the Dual PTT function to emulate a Single PTT, and the ability to lock out the VFO to prevent accidental field programming.
– Next came the 8W F8HP, the first of the high power Baofengs.
– An expanded feature added is R-Tone, a repeater tone for those requiring a 1000, 1450, 1750 or 2000Hz audible tone for access. This is not to be confused with CTCSS or DCS. Prior models provided Burst for 1750Hz only.

The UV-82HP now includes all of the above features in one package. The PTT synchronizing, VFO lockout, High Power, R-Tone, and newest generation chipset.

Measuring cable loss under lab conditionsIt has kept the traditional UV82 case design to ensure compatibility between all existing options, including Dual PTT Spkr/Micr, battery cases, holsters, battery eliminators, etc.

Feature UV82HP UV82 UV82C F8HP UV5R
High Power 7-8W Yes
Dual PTT
Single PTT Sync Option
VFO Mode Disable
Repeater Access Tones
1000, 1450, 1750, 2100Hz
1750Hz

As mentioned above, with software, the UV-82HP can lockout the VFO mode to prevent accidental changes.

The Factory Software has been added to the Miklor.com

By John ‘Miklor’ K3NXU

PERFORMANCE TESTS – LMR-450G
The recently announced LMR-450G cable has aroused much curiosity since its characteristics have not been collectively available by any one source. By multiple inquiries to several manufactures (only three at this time) and numerous lab tests, we hope to put many of the existing questions to rest.

DESCRIPTION
The physical make up of this cable varies slightly from most conventional RF cables. The center conductor is a semi-stranded copper alloy surrounded by Telfon, which will absorb and distribute cable ‘hot spots’ caused by excessive standing wave. The double silver braid and foil outer coating which provides a 98.6% shield is what the inverted high frequency loss characteristics are attributed. The loss is substantially less as the frequency increases, making this cable especially attractive for UHF, cellular, PCS and microwave applications.

LMR-450GLOSS PER 100′
30 MHz 2.4 db
50 MHz 2.1 db
150 MHz 1.6 db
450 MHz 1.1 db
800 MHz .51 db
1200 MHz .37 db
1950 MHz .31 db

The cable’s most unique property is attributed to the outer jacket material Neo-glow, an RF sensitive composite plastic which will visibly indicate RF ‘hot spots’ in the cable. Adjusting the cable length to the antenna system for the ‘perfect’ impedance match is crucial at high frequency, thus the importance of a low SWR for peak performance.

PROPER INSTALLATION
The low level emission of light from LMR-450G cable can be enhanced by wearing lightly tinted sunglasses with UV protection, which enhances the light radiation from the cable. Select an approximate length of cable needed for the installation which must be multiples of a 1/4 wavelength for the desired frequency. The exact length can be determined by using the formula 467 / Freq (MHz) plus approximately 18 inches.

The initial tests should be run with a 50 ohm dummy load at one end of the cable. With a minimum of 7 watts from the transmitter, you will see a faint glow from the cable indicating the ‘hot spots’ to be eliminated. These are the points along the cable where the RF is at its maximum. It is at these points where the RF connectors should be mounted. Trimming the excess cable may be required at both ends of the cable to produce the most effective match. Use caution not to trim too much cable as the loss characteristics improve with longer cable lengths.

SUMMARY
This could be the beginning of the long awaited high frequency “SUPER” cables. Only available in limited quantities at this time; contact your local cable supplier for more details.

One of the nice things of D-Star and DMR is the ability to talk all over the world without the need of an HF rig and a bunch of big antennas. While this largely reduces a radio to a simple Internet-driven communication tool – just like Skype or other VoIP apps – it’s definitely nice to use.

There are a few problems surrounding DMR, one of which is the lack of more than two time slots. For example, if hams are using the Dutch Hytera network and occupying talk group 204 on slot 1, World Wide (which uses the same time slot) will be unavailable. Because 204-1 is a busy place, world wide QSOs are often impossible. It’s one of the reasons I thought of dumping DMR all together — I can talk to the same Dutch guys on analog while enjoying a much better quality audio.

There are reasons to keep DMR too. DMR is maturing; there are more than enough possibilities to put less pressure on the nation-wide network by going local. Now if only hams would do that…. but most don’t. Another reason to keep DMR for now is the gateway we recently added, which connects D-Star to our DMR network.

Not available on the Motorola network, sorry — some people responsible for that network appear to be so scared of such innovations that they will ban a repeater from the network if such a gateway is detected.

Talk group ‘USA 1776’ could add to the appeal of DMR. It’s unclear on which network this talk group will reside, but my best guess is that it will be the Motorola network. MITCON writes:

The “USA 1776″ (English preferred) Talk Group will be distributed worldwide to DMR networks upon request. The spirit of “1776” is to continue the Amateur Radio tradition of international friendship and to push the boundaries of technology in the new frontier of digital communications.

CP2102a CP2102b CP2102jim CP2102o
Source: hamgear.wordpress.com
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