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CB Tune up and Modification reports.......
This is a nice information package which contains information to make basic
reciever, transmitter,modulation and frequency adjustments, as well as mike repairs. All adjustments except those related to frequency can easily be made without any expensive special equipment. Usually all you need is the S/RF meter on the radio itself, a "dummy load", and possibly another CB or walkie-talkie tuned to the same channel. This information package is intended to help the technician to maintain the CB radio in peak condition, and to restore a modified radio to proper operating condition by understanding how many of the more common modifications are made. This package has in depth information on the Realistic TRC-451 and the Cobra 19GTL plus other radios. Includes schematics, parts lists, calibration settings and reports on the above mentioned radios. This is a must information package for any CB hobbyist to have in his or her shack. Click below for more information..... http://cgi.ebay.com/ws/eBayISAPI.dll...m=3036719 949 |
You, too, can be a truckstop screwdriver wizard...
Harry Poulos wrote: This is a nice information package which contains information to make basic reciever, transmitter,modulation and frequency adjustments, as well as mike repairs. All adjustments except those related to frequency can easily be made without any expensive special equipment. Usually all you need is the S/RF meter on the radio itself, a "dummy load", and possibly another CB or walkie-talkie tuned to the same channel. This information package is intended to help the technician to maintain the CB radio in peak condition, and to restore a modified radio to proper operating condition by understanding how many of the more common modifications are made. This package has in depth information on the Realistic TRC-451 and the Cobra 19GTL plus other radios. Includes schematics, parts lists, calibration settings and reports on the above mentioned radios. This is a must information package for any CB hobbyist to have in his or her shack. Click below for more information..... http://cgi.ebay.com/ws/eBayISAPI.dll...m=3036719 949 |
I thought a tune up was changing the oil, and replacing the spark plugs.
NOW you to now can be the first on your block to screw up CBs. "Twistedhed" wrote in message ... From: (Scott Unit 69) You, too, can be a truckstop screwdriver wizard... _ Hey, even cb'ers need techs..... |
You, too, can be a truckstop screwdriver wizard...
Hey, even cb'ers need techs..... I thought a tune up was changing the oil, and replacing the spark plugs. NOW you to now can be the first on your block to screw up CBs. Did you notice the radios listed in that book are over 20 years old? They need real techs by now, not a screwdriver wizard. I'd like to see him fix up the TRC-451 I've got using that book. He'd have to buy the radio from me first, 'cause it won't be usable when I get it back!!! Let's see, no AM modulation, VR10 makes no difference. RX audio starts to "tear". Need to turn radio off & on to fix. It has a great receive, beats my PC-122, but the 122 works on AM, & the audio doesn't "tear" (pronounced like "tare"), but needs a preamp to hear stuff far away. Too much LO, perhaps? It's a mute point, CB has so much f-ing noise and skip. I barely turn it on for more then a minute. No need to. All the locals went ham. Nice and clear on 2 meter simplex, no skip, bleedover or DaveMade AH's to deal with. The ones here are assholes. All that power must turn their brain to jello. I would like to be able to use my CB again if mother nature ever sends the Mexicans back home. The Senorita says 2 words with an off frequency radio that drifts when she keys, and has a roger beep. Listen to that for a few minutes. Then there's the Latino with a humming power supply that's awful to hear with a BFO on it... However, I won't touch Echolink. IRLP is an RF only input. |
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see him fix up the TRC-451 I've got using that
book. He'd have to buy the radio from me first, 'cause it won't be usable when I get it back!!! "TRC" as in "Radio Shack"? Hmm...I have been under the impression the older rat shacks models are some of the easiest to tune, mod, peak, repair,,,whatever...perhaps I'm just lucky and my techs are all super techs. The TRC-451 is a Cobra 146 in a different package. Let's see, no AM modulation, VR10 makes no difference. Ahh,.... it appears you are trying to RE-fix a radio where someone has already been inside......I would guess this would be very different as opposed to going into a stock virgin radio. This and a broken Lafayette LMS-40 were picked up broken for $10 my years ago. The Lafayette is a 9.5. The TRC is weathered badly enough for green corrosion to show on the front. A few screws had to be drilled out when I got it. When I get the bugs out of it (someday, it's not too important to me), I'll take it to the local tech that fixes anything (State Police radio tech) for a complete factory alignment. It's not worth his going rate to fix it. Besides, I need that experience!!! LIKE the DX,,,LOVE the DX on 11 meter, and the only reason some are into cb is for HF DX. Talking everyday with the help of repeaters quickly takes the fun out of long distance communications, for many HF DX enthusiasts, and many simply do not give a damn about hammie radio. CBers, collectively, do not tend to mention or concern themselves with hammie radio. Wonder why the opposite doesn't hold true? Nevertheless, it's good you found a medium of communication that lends you what you have been missing on cb. For many others, cb is it,,,there is no interest in hammie radio. Some intellectually-challenged folks have a problem with this and feel since one is not interested in hammie radio, one is somehow "beneath" those who who are. THAT'S really gonna add to the hammie numbers....can't help but howl at those who share that view. Skip will die down, some year. My CB will get more use. Right now, it's pretty useless for local talking. Skip has gotten boring over the past 26 years. Same noise, different screamer. : Depending on the TRC unit you own, either 22 or 39 other channels are available. Between this and a beam, there are many avenues of escape. When the aggravation factor sets in concerning what one hears on the air, no matter what service one uses, it's time to shut it off. The only 23 channel radio I have is a Regency Range Gain. Mid 60's tube model, crystal synth mixing. It's about a 6 or 7. Original mike! I turn my CB on when I'm out. It only takes a minute before some Mexican or trucker or bleedover turns my receive to trash. CLICK. I try again 10 or 20 minutes later. Repeat cycle, ad nausium, BTW, if I change channel, how will we find each other besides 2 meter simplex? |
Twist,
Your comment to Scott about the 'holier than thou' is well taken. Now, I'll put you in your place concerning tuning up a radio. I turn on the entertainment center, punch up 91.3, and there is WGMC - nice jazz station - presto, I'm tuned up. For those who don't understand, go to rec.radio.amateur.policy or rec.radio.amateur.misc. Oh well, hope the fishing is going well for ya! ;) Why is it that so many folks just can't seem to get along or at least leave others alone? Oh well ... 73 from Rochester, NY Jim ps - if you need further info on tuning a radio, just let me know heheheeeee .... BTW, I will stick up for Scott. The dude is helping others. Really. Not everyone is as one sided as some of the folks I (or you) refer to. Unfortunately, a few *idiots* on one side or the other of the 'fence' give bad names to the rest. Tickle easy! "Twistedhed" wrote in message ... From: (CBer) I thought a tune up was changing the oil, and replacing the spark plugs. That's your bad. Stick around,,you can learn even more. NOW you to now can be the first on your block to screw up CBs. How can you profess to knowing what can "screw up" a cb when you don't even know what a radio tune-up consists of? Ahh..never mind.....LOL. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.502 / Virus Database: 300 - Release Date: 7/18/03 |
In , "Jim Hampton"
wrote: Twist, Your comment to Scott about the 'holier than thou' is well taken. snip Jim, Twisty is right that some hammies have a holier-than-thou attitude, but it's held mostly by hammies like Twisty who use it as an excuse to operate outside the limits of their license. I hope you are not agreeing with him in that respect. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
Lets face it , if there was a GOOD CB built, Not the Uniden,cobra, or any of
the other crap on the market as of now , there would not be any reason for any Tweak or Peak. Most AMers Like to be LOUD, and SWING. Put in a mic circuit like is used in FM equiment ( a audio clipper,and low pass filter) feeding to a modulation adjustment, it will sound LOUD, without needing audio compressors as used in all CBs today that techs cut out causing overmodulation. |
In RlmTa.120842$ye4.88030@sccrnsc01, "CBer" wrote:
Lets face it , if there was a GOOD CB built, Not the Uniden,cobra, or any of the other crap on the market as of now , there would not be any reason for any Tweak or Peak. There's nothing wrong with the performance of most CB radios built today. There are a couple that have issues with the receiver, but vast majority work just fine for their intended purpose. Most AMers Like to be LOUD, and SWING. If you prefer screaming instead of communicating then you probably picked the wrong hobby. If you check your favorite search engine you can probably find a yelling contest in just about every redneck mudhole in the US, so I'm sure there is one near you. And if watching a little red needle bounce around to your voice gives you so much personal satisfaction that you turn it into a hobby, then perhaps you should seek a mental health professional that's experienced in Freudian analysis. Put in a mic circuit like is used in FM equiment ( a audio clipper,and low pass filter) feeding to a modulation adjustment, it will sound LOUD, without needing audio compressors as used in all CBs today that techs cut out causing overmodulation. Like most keyclowns you have no idea what you are talking about. Those "techs" usually cut out the very same thing you want to add -- the audio clipper and low-pass filter -- commonly referred to as the 'limiter'. The result is "LOUD" because it's overmodulating and splattering into other channels. Get a clue. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
Scott Unit 69 wrote:
You, too, can be a truckstop screwdriver wizard... Hey, even cb'ers need techs..... I thought a tune up was changing the oil, and replacing the spark plugs. NOW you to now can be the first on your block to screw up CBs. Did you notice the radios listed in that book are over 20 years old? Sure. Thery're the ones which were the most popular with experimenters, and are by far, the easiest to modify. They need real techs by now, not a screwdriver wizard. I'd like to see him fix up the TRC-451 I've got using that book. He'd have to buy the radio from me first, 'cause it won't be usable when I get it back!!! Let's see, no AM modulation, VR10 makes no difference. RX audio starts to "tear". Need to turn radio off & on to fix. It has a great receive, beats my PC-122, but the 122 works on AM, & the audio doesn't "tear" (pronounced like "tare"), but needs a preamp to hear stuff far away. Too much LO, perhaps? Any radio which is 20 years old or more, and has "strange" problems like you're describing, needs to be aware of drying electrolytic capacitors. They are the bane of most older radios. It's a mute point, CB has so much f-ing noise and skip. I barely turn it on for more then a minute. No need to. All the locals went ham. Nice and clear on 2 meter simplex, no skip, bleedover or DaveMade AH's to deal with. The ones here are assholes. All that power must turn their brain to jello. You're starting to sound like me ;-) I would like to be able to use my CB again if mother nature ever sends the Mexicans back home. The Senorita says 2 words with an off frequency radio that drifts when she keys, and has a roger beep. Listen to that for a few minutes. Then there's the Latino with a humming power supply that's awful to hear with a BFO on it... You forgot the echo boxes. But don't fret. The sunspots are on the decline now. I've been hearing an increased local presence again, now that the skip is pretty much dead at night now, except during strange weather fronts. Dave "Sandbagger" |
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In , "CBer"
wrote: Mabry you need to read what I said again, IN CBs there is NO audio clipper ( look into a FM transmitter circuit and see if one of those are found inside a CB, NOT. ) it just a feed back circuit that controls the modulation level by using a AGC audio circuit, and that is what the techs cut out. You are right, most of them do use an AGC (AMC) system. Regardless, they are there for a reason -- they prevent overmodulation while maintaining the dynamic range of the modulating speech. Disabling the circuit will most definately cause overmodulation. BTW, Mabry is back with the Mariner's again. In my reference the audio clippers does clip the audio in a symmetrical way that sounds Good with out over modulation. The AMC circuits are not symmetrical? And unless you happen to have a sampling o-scope on the bench, how do you know you aren't overmodulating? You don't, and you most likely are, especially when "LOUD" is your primary objective. For as saying CB want to be Loud and Swing is a kick . Maybe to a moron or a small child. Read the other post first before jumping. Open up the CBs as of today and compare it to other radios in the other fields, they are being in technology, To BIG, no good engineering in them, just old circuits that everybody in china has copied, and the same old cap. That's because AM is old technology. Read MY other post before jumping -- radio is a method of communication. It is not an amusement park for morons, and not a therapy room for unsocialized misfits whom people ignore in normal conversation. If you want to be 'LOUD', distort your voice, and add cool sound effects, get an audio effects box like a MidiVerb and plug it into your stereo. If you want to be heard, say something that people want to hear instead of forcing your idiotic and thoughtless rhetoric on them with screaming, splatter and 'swang'. Because otherwise, the only people you are impressing are other morons like yourself. Here's a new technical term for you: PLP, or Peak Learning Power. It is defined as the highest point on the learning curve that a person is able to achieve. People with a low PLP never seem to understand that "power" isn't how many watts you have, it's how you -control- those watts; and it's not how "LOUD" you are, it's how you -control- your speech. Even Twisty understands that much. Like I said before, get a clue. Do you want to impress people? Prove that your PLP wasn't maxed out by the concepts of "LOUD" and "swang". -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
In MPETa.130872$Ph3.16923@sccrnsc04, "CBer" wrote:
"Frank Gilliland" wrote in message .. . In , "CBer" wrote: Mabry you need to read what I said again, IN CBs there is NO audio clipper ( look into a FM transmitter circuit and see if one of those are found inside a CB, NOT. ) it just a feed back circuit that controls the modulation level by using a AGC audio circuit, and that is what the techs cut out. You are right, most of them do use an AGC (AMC) system. Regardless, they are there for a reason -- they prevent overmodulation while maintaining the dynamic range of the modulating speech. Disabling the circuit will most definately cause overmodulation. BTW, Mabry is back with the Mariner's again. In my reference the audio clippers does clip the audio in a symmetrical way that sounds Good with out over modulation. The AMC circuits are not symmetrical? And unless you happen to have a sampling o-scope on the bench, how do you know you aren't overmodulating? You don't, and you most likely are, especially when "LOUD" is your primary objective. I did not say anything about symmetrical IN a AM AMC circuit only in the FM circuit. You said to put the FM clipper in an AM radio to sound loud; "Put in a mic circuit like is used in FM equiment...." So how is it symmetrical in an FM radio and not an AM radio? How is an AGC circuit -not- symmetrical? Or is it like your clipper that is only symmetrical in an FM radio? For as saying CB want to be Loud and Swing is a kick . Maybe to a moron or a small child. I guess you do not get it, I HATE THE TERM SWING, and LOUD I think its STUPTED OK. That seems to contradict your previous statement: "For as saying CB want to be Loud and Swing is a kick ." Read the other post first before jumping. Open up the CBs as of today and compare it to other radios in the other fields, they are being in technology, To BIG, no good engineering in them, just old circuits that everybody in china has copied, and the same old cap. That's because AM is old technology. Read MY other post before jumping -- radio is a method of communication. It is not an amusement park for morons, and not a therapy room for unsocialized misfits whom people ignore in normal conversation. If you want to be 'LOUD', distort your voice, and add cool sound effects, get an audio effects box like a MidiVerb and plug it into your stereo. If you want to be heard, say something that people want to hear instead of forcing your idiotic and thoughtless rhetoric on them with screaming, splatter and 'swang'. Because otherwise, the only people you are impressing are other morons like yourself. Just because AM is a old technology doesn't mean that it can't use newer style parts with some improvements in the circuit design and a smaller BOX. And they have made plenty of improvements over the years. Starting with tube circuits and point-to-point wiring, moving on to PCBs, semiconductors, integrated circuits and PLLs, and many even have seperate processors for frequency control and audio processing. Compare the size and weight of the old whiteface Johnson Messenger or the Lafayette HE-20 to that of any modern radios, and if you can't tell the difference then try dropping both of them on your feet. And don't forget that this is CB radio -- it ain't NASA, SETI, military or commercial trunking, HDTV, cell-phone networking, or even amateur radio. CB is about one step above a child's walkie-talkie, using modulation methods that are older than your great-grandpappy. So how much technology do you need? Or do you just want some hi-tech stuff in your CB radio because 'hi-tech' is cool? Here's a new technical term for you: PLP, or Peak Learning Power. It is defined as the highest point on the learning curve that a person is able to achieve. People with a low PLP never seem to understand that "power" isn't how many watts you have, it's how you -control- those watts; and it's not how "LOUD" you are, it's how you -control- your speech. Even Twisty understands that much. Like I said before, get a clue. Do you want to impress people? Prove that your PLP wasn't maxed out by the concepts of "LOUD" and "swang". I have a term , IHFMTYWEL. I have forgot more than you will ever learn. That's obvious. Try to jog your memory a bit, eh? -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
'hi-tech' is cool. Yes I want a CB built like a ICOM, small, new ICs,not
discrete transistors, much smaller, good designed case, and a good modulation circuit with good audio processing. What a moron |
: Frank Gilliland wrote:
: You are right, most of them do use an AGC (AMC) system. Regardless, they are : there for a reason -- they prevent overmodulation while maintaining the dynamic : range of the modulating speech. Disabling the circuit will most definately cause : overmodulation. "...maintaining the dynamic range of the modulating speech." Not accurate s. |
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