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HT1250 Full Blast SQUEAL

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lfguard10
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Posts: 7
Joined: Fri Jul 20, 2007 10:17 am

HT1250 Full Blast SQUEAL

Postby lfguard10 » Fri Jul 04, 2014 6:27 pm

Hello all,

I have an HT1250 in very good shape that I just received (used). Everything seems to work fine except for one problem. When you turn the volume full-blast, the audio is barely audible due to a squeal from the speaker.

-The firmware version is R05.03.00.
-I have also tried a fully charged battery, as I thought this was the problem, but it didn't fix it.

Any clues?

Thanks

Al
Posts: 1045
Joined: Tue Sep 04, 2001 4:00 pm

Re: HT1250 Full Blast SQUEAL

Postby Al » Sat Jul 05, 2014 4:36 pm

If you try an external speaker(as in remote speaker-mic) on your HT1250 and the problem goes away then you have a microphonic component in the frequency reference or synthesizer sections of the radio. When the subject component is excited by vibrations from the builtin speaker in the HT you have an unwanted feedback path that results in the squeal that you're hearing.

lfguard10
New User
Posts: 7
Joined: Fri Jul 20, 2007 10:17 am

Re: HT1250 Full Blast SQUEAL

Postby lfguard10 » Sun Jul 27, 2014 12:42 pm

Sorry for the late response..... I tried a speaker mic, but it still squeals.

lfguard10
New User
Posts: 7
Joined: Fri Jul 20, 2007 10:17 am

Re: HT1250 Full Blast SQUEAL

Postby lfguard10 » Mon Jul 28, 2014 5:47 pm

Incase anybody has this problem in the future, it turns out the problem was not ONE bad battery, but also the "fresh" battery I tested it with was bad, as well. Time to order more.

User avatar
MaxK98
Posts: 52
Joined: Thu Feb 02, 2012 8:24 am
What radios do you own?: Lots of Motorola!

Re: HT1250 Full Blast SQUEAL

Postby MaxK98 » Wed Jul 30, 2014 5:51 am

non-OEM batteries?

lfguard10
New User
Posts: 7
Joined: Fri Jul 20, 2007 10:17 am

Re: HT1250 Full Blast SQUEAL

Postby lfguard10 » Wed Jul 30, 2014 9:41 am

No, they are OEM. The batteries were charged enough to be operational, but bad enough to support full blast audio. That was what I suspected to start with. The second battery tricked me haha

sabersco
Posts: 32
Joined: Sat Feb 18, 2012 10:17 am
What radios do you own?: Saber III, HT1250, XTS5K, APX

Re: HT1250 Full Blast SQUEAL

Postby sabersco » Mon Sep 01, 2014 9:53 pm

One of the known problems of this radio is that is the volume knob get hits the volume control get hurt. A the end of the setting (high in your case) the control might be “open” make the amplifier to multiply the volume by infinite thus making a squeal . Try changing the power/volume knob if you can it might fix it.


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