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PR-UV9000 Tri-Band Radio

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CLG2013

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I just bought this radio ($40) for it's tri-band capabilities, however, I was surprised to find out it was a quad band radio (the extra band can be enabled using the manufacturer's programming software):

134 - 174 MHz
200 - 260 MHz
320 - 400 MHz
400 - 520 MHz

Does anybody here own this radio and/or have any information on it?
 

KD8DVR

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Watch it... Radios that have these so called "220 mods" have been discovered to generate a strong harmonic on 440.

The most notorious has been the Baofeng UV-B5.

You need to get it on a spectrum analyzer and check for harmonics.
 

CLG2013

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KD8DVR, I suspect you are probably right. Since this radio uses a SMA-M antenna, I will have to order an adapter to test it properly.

I will post what I know about this radio and compare some of it's features to the Baofeng UV-5R, which is about the same size and weight. Since the stock antenna for the UV-5R is less than adequate, I substituted one from my UV-82 for this test. The antenna for the UV9000 is nearly the same size and shape and is marked 150 MHz, 350 MHz, and 430 MHz.

It has a FM radio that can be modified to receive stations on 76 - 114.

There is a scan function. What sets it apart from the UV-5R is that you can select the scan speed (100 ms to 500 ms in increments of 50 ms). You can also set the delay time when it finds a frequency in use. Scan steps can be as little as 5k.

It has a voice scrambler.

It has a kill switch that can be activated via a code sent by a radio configured to act as the admin unit. Disabled radios can be remotely enabled as well.

The keys are in the proper place.

SQL actually works with 10 squelch settings. Default is 5.

The battery is rated the same as the UV-5R (7.4v, 1800 maH). It it weren't for the Baofeng label on the UV-5R battery you wouldn't be able to tell the two apart. In fact, OEM UV-5R batteries fit and operate just fine in this unit. This is a huge plus for this radio.

The UV9000 has a voltage meter in the menu.

The volume knob has to be turned nearly 3/4 of a turn to hear anything, which is annoying. However, the sound is much clearer with less noise than the UV-5R. I would say there is an improvement in sound quality of around 25+% over the UV-5R.

Although there are three color options for the background screen (blue, purple, amber), you can only choose one. You can't select individual colors for RX, TX, or standby.

Contrary to what the product details suggest, you cannot select the number of seconds for the LED backlight to remain on. Options are on, off, or auto. Also, there are only two TX power options: high and low.

There are two SEEK functions for CTCSS and DCS scanning. Very handy feature.

For some odd reason, the menu button is labeled FUN. The manual also refers to the menu button as FUN. Maybe this has some meaning to the Chinese but it seems to me to be an odd way to label a menu button.

The manual is quite readable and actually informative.


Honestly, I wasn't expecting a great deal from this radio when I ordered it. However, if given a choice now between a UV9000 and a UV-5R I would pick the UV9000. The improvement in sound quality is substantial. My opinion may change once the radio is given some serious hardware testing.
 

DistantSignal

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CLG2013, Does it actually transmit on there though? I've tried this with numerous chinese handhelds and it'll show it's transmitting but it actually isn't.

KD8DVR, Can you explain in layman's terms what the harmonic stuff means? I've seen it mentioned in numerous places.

Cheers :)
 

CLG2013

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I will not do any TX testing in the 200 MHz band until I can test the unit in a controlled condition. There are two many local public service frequencies in the 400 MHz band. Harmonics is a very real possibility (~200 MHz * 2).
 

KD8DVR

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CLG2013, Does it actually transmit on there though? I've tried this with numerous chinese handhelds and it'll show it's transmitting but it actually isn't.

KD8DVR, Can you explain in layman's terms what the harmonic stuff means? I've seen it mentioned in numerous places.

Cheers :)

A harmonic is a signal generated in multiples of the frequency you want to actually transmit on. (will omit the geek-ese why this can happen) A properly designed radio will eliminate this. If you go outside of the design limits of the radio, you can still run into a harmonics problem.

In this case, a radio set to say 220 Mhz will generate a signal on 440 Mhz, 660 Mhz, etc.

now... The radio in question.. would have filtering in place to take care of any harmonics generated by the fundamental frequency in its design.

However.... Being as say, 440 Mhz is one of the frequencies the radio is designed to operate in, you will see no filtering.

What we have seen is a radio modded to transmit on 220 mhz will transmit a very weak signal on 220.... but a FULL-power signal on the 440 Mhz harmonic, because there is filtering to prevent 220 mhz; but none to prevent 440 mhz.

In this specific radio, I'm not sure. It hasn't been tested by anyone yet. I know from personal experience the Baofeng UV-5R does.
 

DistantSignal

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Thanks John for the explanation.

So will the signal on say 440 and 660mhz be a blank carrier type signal or will it contain the users voice like it would on 220mhz?
 

KD8DVR

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Thanks John for the explanation.

So will the signal on say 440 and 660mhz be a blank carrier type signal or will it contain the users voice like it would on 220mhz?

On 440, a full signal, just like you intended to transmit there in the first place. I would imagine any second or third harmonics would likely be trapped as these frequencies are out of designed operating ranges.
 
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