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Hacked Quansheng UV-K5(k) a Baofeng Killer? modulation - power output - Antenna SWR

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DM4DS - Sandor

DM4DS - Sandor

Жыл бұрын

Measured the "Baofeng Killer" UV-K5, opened up via the "MARS-MOD" by pushing the 2 buttons and tunr it on, surprise no horrible harmonics like reported by many - FM modulation analysis and also the original antenna SWR from 40MHz - 2Ghz.
Some thoughts things I like and some I don´t. If you have questions, please post them, so I can make a follow up and answer everything.
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You wanna know which Antenna is my favorit?: • Over 20 portable anten...
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Sandor
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Пікірлер: 15
@beachedbum8682
@beachedbum8682 8 ай бұрын
You mentioned you had a favorite antenna?
@13EL121
@13EL121 Жыл бұрын
Firmware Bug oder Konstruktionsproblem. Externe PTT funktioniert nicht wenn Squelch offen ist oder Frequenz belegt ist (Busy Bug?). Ansonsten funktioniert das Baofeng Mikrofon mit dem UV-K5. Klasse Video, besten Dank für deine Arbeit. Sehr informativ. 👍
@DM4DS
@DM4DS Жыл бұрын
Soweit ich mich erinnere, gibt es eine Funktion dass man nicht senden kann wenn RX aktiv, liegt es vielleicht daran, klingt zumindest danach? Hoffe ich verwechsle jetzt nichts. Das Mikrofon muss ich nochmal testen. Hatte meines vom 878 genommen, welches auch am UV5R geht, Lautsprecher und PTT ging, aber keine Audio in der Aussendung. Muss ich nochmal mit einem Anderen Mikro testen.. vy73 Sandor - DM4DS
@13EL121
@13EL121 Жыл бұрын
@@DM4DS ja, die sogenannte Busy Funktion. Scheint aber mit externen Mikrofon immer aktiv zu sein, obwohl sie im Menü deaktiviert ist. Mal schauen was zukünftige Firmware Updates bringen.
@epsavit1
@epsavit1 Жыл бұрын
hi, i got this radio and the new uv 5r plus. on both radios the sma connector of the radios are shorted. i did a continuity test with my multimeter and in both radios the sma pin and the sma part where you screw the antenna are shorted which means there is no ground on the sma connector so whether you use a ground or not it doeasnt matter or maybe makes things worse. on every other radio i have the sma connector is as it is supposed to be. also on the back of the radio on the baterry pins, which are on the back top the negative is connected to both the sma pin and the part where you screw the antenna. but the ground which is the middle baterry pin is not connected anywhere. can you check your radio if it is shorted ? or mabe this is how they come out from the factory ? thanks
@Bernie_DK5BM
@Bernie_DK5BM Жыл бұрын
Sandor, how have you measured the harmonics ? I assume you were using an external ATT with about 40dB + the internal 30dB. Can you measure again but please reduce the internal to 10db and the RBW to, lets say 100kHz or less. Also the Antenna was much worser on my unit. SWR about 5 on 2m and 2,5 on 70cm (Anritsu S331E & VIAVI JD724/745). 73 Bernd DK5BM
@DM4DS
@DM4DS Жыл бұрын
I used an external 30dB ATT. With some time, I can redo the test with less ATT and smaller bandwidth. I also got a second one and so I have a second antenna to measure. Maybe there are differences, like yours , which is much worse. vy73 Sandor - DM4DS
@johnwest7993
@johnwest7993 Жыл бұрын
Info on expanded receive would be much more useful than transmit.
@DM4DS
@DM4DS Жыл бұрын
@johnwest7993 what do you mean by expanded RX? Sensitivity or what? It receives on the frequencies it transmits.... maybe I don´t understand the comment. vy73 Sandor - DM4DS
@92pavelow
@92pavelow Жыл бұрын
Europe needs -60
@RandyBeavers
@RandyBeavers Жыл бұрын
33 cm 900 MHz in US
@dg9bfc
@dg9bfc Жыл бұрын
40 db down is out of spec.. In minimum should be 50... Better 60 db
@juergenw7495
@juergenw7495 Жыл бұрын
depends on the country
@Bernie_DK5BM
@Bernie_DK5BM Жыл бұрын
@@juergenw7495 Yes, FCC recommend -40dBc for radios up to 25 watts. But BNetzA says -60dBc up to 1GHz and this radio will not reach it (other radios do, but none of the chinese FCC approved radios).
@juergenw7495
@juergenw7495 Жыл бұрын
@@Bernie_DK5BM yep.. i think in austria (im from there) its 50 or 55db im not 100% sure.
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