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Common problem with the HTX-202 is that using it with a TNC requires the
volume be turned WAY up. With the squelch open it does not take long to
burn out the audio amp. There's an easy fix.
Open it up:
Remove the antenna, battery pack, and anything else you have hooked up to
the radio.
Remove 5 screws on the back and the 4 screws on the battery plate.
Pull the back away from the radio, taking care not to break the ribbon
cable that connects the to sides.
Find the audio sub board. This is on the main board just below the large
removable connector at the top of the radio.
Unplug this big wire connector from the top.
Flip the radio over and find the 6 pins for the audio sub board.
Break out the soldering iron and push the pins out from the back while
giving a pull on the board from the front. Be careful not to damage the
pins or get solder on any of the other parts. "that would be bad".
Now you have two options.
Option 1: Replace the entire audio board with another from a dead HTX-202
or an HTX-404. Option 2: Replace the IC on the audio board (IC601) with
an LM386N-3 LOW VOLTAGE AUDIO AMP.
Replace the audio board in it's place making very sure to only use just
enough solder to connect it, watch those connections, lots of other pads
on the back that are very close to the audio board's pins.
Plug in the wire connector.
Put it all back together.
:~) N5VJA
"To prevent this problem,
The HTX-202 requires a modification on the audio output board.
A 10 Ohms 1/4W resistor MUST be added in series with C603.
When output is loaded with way-too-high impedance load, The amplifier IC
is prone to high frequency oscillation (ultrasonic or higher).
If the IC start to oscillate, C603 apears to IC601 as a dead-short,
causing IC601 to blow.
A 10 Ohms resistor in series with C603 forms a dummy-load to prevent high
frequency oscillation.
Take your time! Unsoldering the audio PCB and IC601 can be tough if
you're not familiar with bouble-sided PCB and surface-mounted componants!
What else can I help you with?
Can ic ca3070 replace ic ca307?
No. It's an entirely different device. Look up the data sheets on them. A CA307 is a single-ended op amp and a CA3070 is a video chroma key device. Try a LM741 op amp. Radio shack stocks them
Can you put 4 subwoofers on 1 amp?
Yes you can depending on the wattage of the amp. i personally would only put two 12's on one amp. cause it will still bump hard!!(:
How many milliamps are there in an amp?
"milli" means a thousandth in the metric units of measurement. Thus 1000 milliamps = 1 amp.
How much power is consumed through a 3 amp?
-- If the 3 Amp is being drawn from a battery,then the battery is supplying3 x (Voltage of the battery) watts.-- If the 3 Amp is flowing through a resistor,then the resistor is dissipating9 x (Resistance of the resistor) watts.
How do you calculate percentage of profit using tally software?
Their are two ways select ratio analysis & tally gives you various ratios alternatively select profit & loss account Press F12 & select show percentages as yes and save
How can I connect a connect amp to an audio interface?
To connect a Connect Amp to an audio interface, you can use a standard RCA cable. Simply plug one end of the RCA cable into the audio output of the Connect Amp and the other end into the audio input of the audio interface. This will allow you to play music from the Connect Amp through the audio interface.
What is the best amp to run 2 jl audio 10w3v3 a mono amp or a 2 channel amp?
jl audio 500/1
How do you convert an 8 ohm car audio amp to a 2 ohm car audio amp?
you dont
How do you remove the 2008 is250 Lexus audio amp?
how do you remove the 2008 is,250 lexus audio amp
How do you replace the audio amplifier in a television?
In some older rear projection televisions, the audio power amp is separate from the video chassis. It can be bypassed or replaced. But in most (if not all) flat screen televisions, the audio power amp is integrated into the set, and cannot be readily replaced. It can be repaired, but I don't think that is what you were asking.
Does the Audio-Technica AT-PL50 Turntable have a built in pre-amp?
The Audio-Technica AT-PL50 does have a built in pre amp.
What is the quality of the amp sound in this new audio system?
The quality of the amp sound in this new audio system is excellent.
How do you fix your stereo from cutting in and out on your 1993 Lincoln Mark VIII?
It's probably the amp, either change it or replace the audio system
How can I connect an amp to an audio interface?
To connect an amp to an audio interface, you can use a standard instrument cable to connect the amp's output to the audio interface's input. Make sure to adjust the input levels on the audio interface to avoid distortion and ensure proper sound quality.
What's amp and how does it impact the performance of audio equipment?
An amp, short for amplifier, is a device that increases the strength of an audio signal. It impacts the performance of audio equipment by boosting the signal to produce louder and clearer sound. A good amp can enhance the overall quality of audio output, while a poor amp can result in distorted or weak sound.
How can I connect the Connect Amp to my computer?
To connect the Connect Amp to your computer, you can use a digital audio cable such as an optical cable or a coaxial cable. Simply plug one end of the cable into the digital audio output on your computer and the other end into the digital audio input on the Connect Amp. This will allow you to play audio from your computer through the Connect Amp and your speakers.
Why isn't your audio receiver sending sound out to your TV from a audio out jack?
Your TV excepts pre-amp only. Your Audio out is Amplified. You blew out the amp chip in your TV as soon as you tryed it. Sorry.
