nonford

Well, had the crap scared out of me today! I was going over to Quads place this afternoon and was passing an 18 wheeler. Just before I was going to overtake him, I hear over my stereo some radio squak and then my truck studders like crazy, gauges going nuts and freaking me out! I was able to get pass him and then all was fine. Told Stan of my experience and he said "Yep"! A high powered transmission will do that to a Dodge. He stated it has not happened to the other trucks (Ford,GM). Stan suggested to go to Radio Shack and get a "toriod" (sp?) so that it can insulate the signal. Just wonder who else had that type of experience. This must be a freak thing and I don't think that guy was legal with a unit like that. Also, I think it affected some other cars because brake light city was all around this guy. IT FREAKED ME OUT. Also, no codes were thrown.

nickleinonen

a high power CB can mess things up. detroit diesel when the 60 series [ddec1] came out had trouble with the ddec1 ecm's and them being fryed by high power CB transmissions [even worse in tunnels]

CSAGrey1

LMAO!! It happens. Even with the 500 watts I am pushing it causes a few issues every now and then. But I guess you have to pay to play! The real fun part is talking to people through thier stereo!!! THat always makes for good fun.

Ahem; THIS IS GOD SPEAKING!!! YOUR LEFT TURN SIGNAL IS STILL ON!!

John Rodriguez

I can't do that with 150watts

MR4WLR

Have a friend on the nwbombers that had a quad box and couldn't even use his own 5 watt cb - would kill the truck just from keying up. Tried rerouting wires, different cb, shielding....no luck. Take off the quad box and it's all good.

nonford

I'm just surprised that it has never been brought up here. I guess it doesn't happen that much, but I wil try the rf blockers and hopefully I won't experience it again. Let me tell yah, in tight traffic and surrounded in the left lane, it got me skiddish. There was no room to pull over on that stretch too.

Lary Ellis (Top)

I have heard of a couple guys with that issue, they fixed it with the rf blockers.

nonford

Well, I just got done putting on the blockers. I put them right by the plug that goes into the box. Try that and hopefully it will be awhile before I have another encounter. I hope I never get it again.

txdiesel3500

When a person uses an illegal amplifier on a radio that is not designed for tis type of power it transmits high level of harmonics. These harmonics can interfer with alot of electronic equipment. Several years ago a person was using 10,000 watts on cb and the tranmission crash a helicopter. CB radios are only designed to put out 4 watts. If he gets caught, highly doubtful, theres a healthy fine and possible jail time.

Allan

bmoeller

The trucker may or may not have had a amp (probably di though). Some of the import radios make some power, even before being tweaked.

I remeber being told, that in the '70s they tried ABS brakes on big trucks. The frequencies that the brakes used to to close to the ones that the CBs use. It would cause a loss of the braking system when a radio was keyed up. My uncle has an old Ford LN9000 that had it from the factory. Most of it is still there, but not hooked up.

88bird

i can talk through others fm radios with my 230 watt setup.... i don't even have to buy a taklback board for mine.... it comes through my radio......

mikmaze

uncle charlie you listenin?

txdiesel3500

bmoeller- Radios operating on the 11 meter band (cb freqs) Only allowed 4 watts
output power. It has to be type accepted by the FCC. I used to be a radio tech and I had a police chief using a modified radio that put out 25 watts. He was using a 150 watt amplifier on 155.031. That was a shared freq and he was only supposed to use 5 watts. He wanted me to match the radio and the amp but I refused. Needless to say he got very mad. I called the fcc office in Dallas and let him talk to the engineer in charge. He left with a different frame of mind .

Allan

v8440

At least some of the problem with talkthrough on radios and such is that many people with big illegal amps on cb's don't have the slightest clue what the hell they're doing. Overdriving the amp will cause "splatter", which results in their signal being radiated over a FANTASTICALLY broad frequency spectrum. This does nothing to help extend the range of the transmitter, and puts garbage on just about every frequency. Totally irresponsible-far worse than intelligently operating an illegal linear amp. Now, a properly-operated high power transmitter can also cause bleedover into devices. The "front end" (meaning the tuning and rf amplification circuitry) of any receiver can be made to pass through a signal of a frequency it's not tuned to if that signal is strong enough. The same applies to stereo equipment-audio amplifiers can be made to reproduce AM transmissions if the signal is strong enough. Part of the reason cb's are legally limited to low power transmission is probably because the antennae are likely to be in close proximity to other equipment, unlike broadcast antennae that normally reside at high elevations away from grandpa's 8 track player.

I bet if you gave a basic radio theory test to a random group of cb'ers using big amps, most would fail miserably. Maybe I'm wrong, but I see little evidence to indicate otherwise.

txdiesel3500

Here ya go off the FCC website.
[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR95.425]

[Page 547]

TITLE 47--TELECOMMUNICATION

CHAPTER I--FEDERAL COMMUNICATIONS
COMMISSION (CONTINUED)

PART 95_PERSONAL RADIO SERVICES--Table of Contents

Subpart D_Citizens Band (CB) Radio Service

Sec. 95.425 (CB Rule 25) May I make any changes to my CB station
transmitter?

(a) You must not make or have any one else make any internal
modification to your CB transmitter.
(b) Internal modification does not include:
(1) Repair or servicing of a CB station transmitter (see CB Rule 24,
Sec. 95.424); or
(2) Changing plug-in modules which were certificated as part of your
CB transmitter.
(c) You must not operate a CB transmitter which has been modified by
anyone in any way, including modification to operate on unauthorized
frequencies or with illegal power. (See CB Rules 9 and 11, Sec. Sec.
95.409 and 95.411.)

[48 FR 24894, June 3, 1983, as amended at 63 FR 36610, July 7, 1998]

[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR95.410]

[Page 543]

TITLE 47--TELECOMMUNICATION

CHAPTER I--FEDERAL COMMUNICATIONS
COMMISSION (CONTINUED)

PART 95_PERSONAL RADIO SERVICES--Table of Contents

Subpart D_Citizens Band (CB) Radio Service

Sec. 95.410 (CB Rule 10) How much power may I use?

(a) Your CB station transmitter power output must not exceed the
following values under any conditions:

AM (A3)--4 watts (carrier power) SSB--12 watts (peak envelope power)

(b) If you need more information about the power rule, see the
technical rules in subpart E of part 95.
(c) Use of a transmitter which has carrier or peak envelope power in
excess of that authorized voids your authority to operate the station.

[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR95.421]

[Page 546]

TITLE 47--TELECOMMUNICATION

CHAPTER I--FEDERAL COMMUNICATIONS
COMMISSION (CONTINUED)

PART 95_PERSONAL RADIO SERVICES--Table of Contents

Subpart D_Citizens Band (CB) Radio Service

Sec. 95.421 (CB Rule 21) What are the penalties for violating these rules?

(a) If the FCC finds that you have willfully or repeatedly violated
the Communications Act or the FCC Rules, you may have to pay as much as
$10,000 for each violation, up to a total of $75,000. (See section
503(b) of the Communications Act.)
(b) If the FCC finds that you have violated any section of the
Communications Act or the FCC Rules, you may be ordered to stop whatever
action caused the violation. (See section 312(b) of the Communications
Act.)
(c) If a Federal court finds that you have willfully and knowingly
violated any FCC Rule, you may be fined up to $500 for each day you
committed the violation. (See section 502 of the Communications Act.)
(d) If a Federal court finds that you have willfully and knowingly
violated any provision of the Communications Act, you may be fined up to
$10,000 or you may be imprisoned for one year, or both. (See section 501
of the Communications Act.)

[48 FR 24894, June 3, 1983, as amended at 57 FR 40343, Sept. 3, 1992]

I am done. Sorry for the long post.
Allan