[chirp_users] Baofeng around 900mhz - veideo

[IZ3GME Marco]

On the schematic of the UV5r is easy to find that a RDA1846 is used.
In the datasheet of the component is written "The RDA1846 can be tuned 
to the worldwide frequency band for Walkie Talkie from 400MHz to
500MHz and especially from 134MHz to 174MHz" etc etc

As obvious consequence the radio cannot tune anywhere outside that 
ranges, it doesn't matter what is on the display: it simply cannot.

BTW for the fm broadcast range a RDA5802 is used, it can tune 65-108MHz

73 de IZ3GME Marco


On 26/02/2013 16:01, Anbes wrote:
> Well, I just post the video to show you up what is happening. I can
> "monitor" this "interference" evereday, in many frequencies around 900
> and 990mhz. As I said, I coul hear, once, loud and clean a communication
> around 930.700mhz. I really don't know if it is 2m-tunes side, I don't
> havy this technical infos and expertise. I can post another video
> showing the scan mode tuning many frequencis since 900mhz till 999mhz
>
> ------------------------------------------------------------------------
> *De:* Dan Smith <dsmith at danplanet.com>
> *Para:* Discussion of CHIRP <chirp_users at intrepid.danplanet.com>
> *Enviadas:* Terça-feira, 26 de Fevereiro de 2013 11:42
> *Assunto:* Re: [chirp_users] Baofeng around 900mhz - veideo
>
>  > I wonder if the UV-3R radios are capable of doing the same?
>  >
>  > If one of the chirp developers want to try modifying the software, I
>  > can try it on my UV-3R ___
>
> I had three vintages of UV5R on the service monitor last night. None of
> them would lock up at anything much above their stated range. None of
> them generated RF, nor would receive a +3dBm signal straight into their
> antenna jack.
>
> Not conclusive evidence by any means, but I tend to think that the
> poster of the video is either experiencing a fluke, a weird harmonic,
> or perhaps is confusing audio coming from the 2m-tuned side of the
> radio.
>
> --
> Dan Smith
> www.danplanet.com
> KK7DS
>
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