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Quansheng TG-K4AT Programmable UHF Transceiver
Kenwood TH-K2AT housing design clone Quansheng TG-K4AT is a UHF Two-Way Radio from in China.
It covers 400MHz~470MHz with 39 CTCSS codes, able to store TX/RX independent frequencies, repeater shift, CTCSS code in 99 channel memory. Output 4W/1W with 7.2V Ni-NH battery pack. Bright green backlit on LCD display. It has a voice reminder instead of keypad beep. Very good physical construction quality.
Physical built quality is good, so some cons on this radio stick out more.
One major flaw on this radio is no squelch control. There is a Monitor button to open squelch like FRS radios.
Reception is good, you may not need to adjust squelch but not having control is a bit strange.
Unique feature on this radio is "Voice Reminder", instead of keypad beep it speaks key being pressed. Sounds great? no, it's too loud and no control on sound level other than turning it off. Sound is injected to audio circuit after volume control, turning volume down has no effects. Quansheng's specification says language available in English / Chinese (Mandarin) / Thai, but it's not user selectable. Though it really doesn't matter because the first thing you do is turning "Voice Reminder" OFF by [F][5].
This may be a Pros or Cons depending on how you're going to use this radio. No changes can be made to memory settings in Channel mode. CTCSS on/off and its frequency is locked with TX/RX frequencies. You can see current CTCSS frequency by [F][8] or [F][9]. Power output Hi/Low can be changed in Channel mode.
LCD backlit is bright (maybe too bright), 0.5KHz shows on display but design of display itself could be better. Battery indicator / Signal level meter (looks just works as on/off) is using "quot; character in dotted line, it's not legible especially with perforated background pattern. Simple block pattern could be used for this indicator. Also it's minor, typeface of letters on LCD is not consistent, as if someone modified LCD display artwork using a typewriter.
This is a housing design clone of Kenwood TH-K2AT. Location of orange button is Power button on Kenwood TH-K4AT which makes sense. The orange button is "Function" key on Quansheng, this is awkward to setup several functions, it's too far from others.
A button marked as "LM" below "Monitor" button is a fake, no switch inside. This could be used as a backlit button. Leaving non functional element upon design changes (or provision for future functions) isn't good.
The radio should have Direct channel number input from keypad. Navigating 99 channels with up-[A] / down-
buttons is very difficult.
One last note, LED Indicator on desktop charger is not accurate. Simple circuitry in charger just detect voltage. You may want to leave the radio on green for awhile.
Body colour of radio is not black, dark grey with touch of blue.
Remote Speaker/Microphone
TG-K4AT Function List
Functions Keys
Up [A]
Down
Mode Select [F][1] (freq/ch/freq+ch display)
CTCSS on/off* [F][2]
CTCSS Frequency* [F][3] <select freq. by A, B key>
Frequency Step* [F][4] repeat [4] 5, 10, 12.5, 25
Voice Reminder on/off [F][5]
Repeater shift mode* [F][6] repeat +. -. none
Repeater shift set* [F][7] enter 00.1~19.9MHz
View RX CTCSS* [F][8] (in channel mode only)
View TX CTCSS* [F][9] (in channel mode only)
Lock/Unlock Keypad [F]Output Hi/Low [F][0]
Store RX Frequency* [F]Store TX frequency* [F]Scan ascending [F][C]
Scan descending [F][D]
Erase All Memory hold [EXIT] & power on
* in Direct Input Mode only
* in Channel Mode only
Quansheng 39ch CTCSS
Ch Hz Ch Hz Ch Hz Ch Hz Ch Hz
1 67.0 9 88.5 17 114.8 25 151.4 33 203.5
2 69.3 10 91.5 18 118.8 26 156.7 34 210.7
3 71.9 11 94.8 19 123.0 27 162.2 35 218.1
4 74.4 12 97.4 20 127.3 28 167.9 36 225.7
5 77.0 13 100.0 21 131.8 29 173.8 37 233.6
6 79.7 14 103.5 22 136.5 30 179.9 38 241.8
7 82.5 15 107.2 23 141.3 31 186.2 39 250.3
8 85.4 16 110.9 24 146.2 32 192.8
The radio has 39 CTCSS tone settings, 69.3Hz is inserted at Ch2. Shift one channel up if you need to communicate with Standard 38ch CTCSS radios.
ex: TG-K4AT CTCSS ch3 = Standard 38CTCSS ch2.
MAY 02 2006:rev.1 MAY 22 2006
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