My #Quansheng UV-K5 goes back to the box. RX is very bad, no matter the antenna (my son and I did some RX testing yesterday away from city noise). Any strong signal somewhere will deafen it. AM is fake. Yes, you can flush any firmware, etc., but the radio is even worse than a #Baofeng #uv5r . Fortunately I just invested 15€ on it.

Update Your Chinese Radio Without The Pain - The new hotness in cheap radios this year has been the Quansheng UV-K5, a Chinese ... - https://hackaday.com/2023/08/13/update-your-chinese-radio-without-the-pain/ #firmwareupdate #softwarehacks #quansheng #webserial

#NotGoogle #Quansheng

Inexpensive Ham Radio Gets Upgrades Thanks to a Trojan - Love them or hate them, the crop of cheap hand-held amateur radio transceivers is... - https://hackaday.com/2023/07/06/inexpensive-ham-radio-gets-upgrades-thanks-to-a-trojan/ #amateurradio #handytalkie #radiohacks #quansheng #firmware #s-meter #trojan #rssi #uvk5 #ham

Receive LO leakage from a #Quansheng #UVK5 set to dual watch.

As the clocks are divided down to get the exact LO, the two leaking tones are quite close to each other. Unlike 1200MHz and 145.000MHz.

Test setup for measuring the RF output direct from the #BK4819 chip used in the #Quansheng #UVK5 radio.
It is soldered to the transmit output pin via the stock DC blocking cap, suspected to be 100pF.

Whee!
No longer nanowatts!
From -60dBm to booming -86dBm on 1297.500MHz!
#quansheng #uv5k #23cm #1296 #GHz_bands #radio #modz

Hahaha! Guess what.
The BK4819 chip in the #Quansheng #UV5K radio DOES work on #23cm.
Just hitting filters (noise lump is from the UHF PA chain running full throttle on noise).

Glorious -60dBm on 1297.500MHz!
A whole 0.000001mW of it!

This beats the -75dBm we got from rtl_trx on 1270MHz (aberfoot unmodified rtl-sdr stick used as a trasnceiver).
I even worked OH3HMU on 1270MHz with an rtl-sdr stick So the power is kainda usable.

#hamradio #microwave #GHz_bands