LT-158 40ch CB (Stay Clear of these !!!!)

We had been looking around for a street legal 40ch CB for the NZ/Australian market.  That would mean 40ch, AM/LSB/USB and a 12w single final only. No FM. Most of our export rigs have dual finals Multiple banks of 40 channels and FM in them as well to increase their appeal in the European and freeband markets. We saw these on the internet and made a deal to buy 10 of them. The boards although smd looked ok and the schemetic we were given was very similar to the good old cobra 148 circuit of old. Simple shit. Hard to get it wrong.

WRONG! They sure messed it up. From radios we were told were ex stock ready to ship the excuses began and the order was over 3 weeks late in shipping.  The radios arrived and they were put through their paces. They all failed. Absolutely horrible receive, 2w AM output, SSB all over the place, rust spots, scratched cases, Screws worn from frequent use…the danger signs were all there. We complained of course. Mr Carlos Lu of bond generously agreed we could send one back for them to look at. Far out. At our expense mind you! We wanted to return the entire shipment and have our money refunded. So we are out a bunch of money and have these shit radios we now have to try to get working and sell for what we can get for them. Or sell them for scrap/parts.

Hope we have stopped someone else making the same mistake.

Pure Crap.

Check the video out;

Here are the specifications we were given:

LT-158 Spec

LT-158 Diagram

LT-158 Specification

PA system

Dual conversion AM receiver

Front panel microphone connector

Output power: 4/12W

40 channels AM

80 chnnales SSB

Power switchable automatic

Noise limiter

RF gain control

Switchable noise blanker

Position tone switch


Illuminated S/RF/SWR meter


Channels: 40 AM, 40 LSB, 40 USB.

Frequency Range: 26.965 to 27.405MHz.

Frequency Control: Phase Lock Loop (PLL) synthesizer.

Frequency Tolerance: 0.005%.

Frequency Stability: 0.001%.

Operating Temperature Range -30℃ to+50℃.

Microphone Plug-in dynamic; with push-to-talk switch

and coiled cord

Input Voltage 13.8V DC nominal, 15.9V max, 11.7Vmin.

(positive or negative ground)..

Current drain TransmitAM full mod., 2.2A.

SSB 12 watts PEP output,2A.

Receive: Squelched, 0.25A

Maximum audio output, 0.6A.

Size 2-3/8”(H)*7-7/8”(W)*9-1/4”(D).

Weight 5 lbs

Antenna Connector UHF, SO239

Semiconductors 3 field effect transistors, 45 transistors,

63 diodes, 6 integrated circuits,1 two color

light emitting diode.

Meter(3-in-1) Illuminated; indicates relative output power,

received signal strength, and SWR.


Power Output AM, 4 watts.

SSB,12 watts, PEP.

Modulation High-and low-level Class B, Amplitude Modulation

Intermodulation Distortion SSB: 3rd order, more than-25 dB.

5th order, more than-35 dB.

SSB Carrier Suppression 55 dB

Unwanted Sideband 50 dB

Frequency Response AM and SSB300 to 2500Hz.

Output Impedance: 50 ohms, unbalanced.

Output Indicators: Meter shows relative RF output power and

SWR. Transmit LED glows red when trans-

mitter is in operation.


Sensitivity SSB:0.25μV for 10dB (S+N)/N at greater

than 1/2-watt of audio output.

AM:0.5μV for 10dB (S+N)/ at greater than

1/2-watt of audio output.

Selectivity AM: 6dB@3KHz, 50dB@9KHz.

SSB: 6d B@1.1KHz,60dB@2.3KHz.

Image Rejection: More than 65 dB.

IF Frequency AM: 7.8MHz lst IF, 455KHz 2nd IF

SSB: 7.8MHz

Adjacent-Channel Rejection 60dB AM&70dB SSB.

AM and SSB RF Gain Control 40dB adjustable for optimum signal reception.

Automatic Gain Control Less than 10dB change in audio output for

(AGC) inputs from 10 to 100,000 micro volts.

Squelch Adjustable; threshold less than 0.25μV.

ANL: Switchable.

Noise Blanker: RF type, effective on AM and SSB.

Voice Lock Range: ±1.5KHz.

Audio Output Power 4 watts into 8 ohms.

Frequency Response: 300 to 2500 Hz.

Built-in Speaker: 8 ohms, round.

External Speaker 8 ohms; disables internal speaker when

(Not Supplied) connected.


Power Output 4 watts into external speaker.

External Speaker for PA: 8 ohms.

(Not Supplied)

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2 Responses to LT-158 40ch CB (Stay Clear of these !!!!)

  1. Daryl 2ZX001 says:

    I was wondering if there was any progress to getting these radios usable? They look great; dirty shame they’re crap!

  2. Tom from New Jersey says:

    I had ordered the 159 model, paid for them but never got them, so PayPal gave me my money back, Thank God after seeing this

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