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#12
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On Thu, 26 Feb 2004 17:40:40 GMT, Ken wrote:
I just bought a few of these for myself and friends. None of them seem to be working. Problem is solved. These are for export and need to be "converted" to work with American electrons. ;-) Ken (to reply via email remove "zz" from address) |
#13
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![]() From: =A0=A0 Frank Gilliland Group: =A0=A0 rec.radio.cb Subject: =A0=A0 KL40 amp problems Date: =A0=A0 Thu, Feb 26, 2004, 8:58pm (EST-3) X-Trace: =A0=A0 corp.newsgroups.com 1077857940 216.64.140.70 (26 Feb 2004 22:59:00 -0600) X-Comments: =A0=A0 This message was posted through A href X-Comments2: =A0=A0 IMPORTANT: Newsfeed.com does not condone, X-Report: =A0=A0 Please report illegal or inappropriate use to X-Comments3: =A0=A0 A href =3D"http://www.newsgroups.com"Visit Organization: =A0=A0 Newsfeeds.com http://www.newsfeeds.com 100,000+ UNCENSORED Newsgroups. In , wrote: One other oddity. Before I power up the radio, the amp is drawing zero current. As soon as I power up the radio (on RX), the amp starts drawing 180 ma, whether it is switched on or off. (=A0=A0Impossible. The amp has no input for the powered condition of the radio (receive). ) Wrong -- it's very possible. That is a MOSFET amp with no power switch. A bad combination to be sure, because as long as there is source-drain voltage, any kind of signal can drive it to some extent. It's possible that C1 could be shorted (after all, it's only rated for 50 volts) and the output of the radio have a DC component. Or if D2 is blown (a 1N4148 passing 3 watts -- yikes!) D1 will hold a nice, steady DC bias on the MOSFET. There are a lot of possible scenarios for what he is describing. What -is- impossible is for you to think before you demonstrate your ignorance. Heal thyself. In the first manner, there is no need for projected disdain and insult towards one who you disagre with. Keeping wiht the subject of the group and discussing the electronic possibilities that may or may not be wrong without insult is a good way to try and lose the deficit in communication you portray that has you becoming an insultive jack ass to a poster in a group for merely offering a differing point of =3Dview than yourself. Your level of intolerance for differing views llustrates your true level of intellect and communication skills. The chance of probablility you offer concerning your weak input concerning all three amps having the same short is ridiculous, like most of your ignorant and abusive posts that were responsible for you having no choice but to subscribe to a pay access in order to access the group in the most obsessive manner. The likelihood of one individual being correct increases in a direct proportion to the intensity with which others try to prove him wrong |
#14
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#15
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In , wrote:
On Fri, 27 Feb 2004 05:14:24 -0500, wrote: snip I forgot to mention.....C1 can't be shorted on all three amps It can if the cause of the short is common to all three amps, such as a fault in the radio testing the amps. I guess you -didn't- learn the first dozen times. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#16
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In ,
(Twistedhed) wrote: From: (Ken) On Thu, 26 Feb 2004 17:40:40 GMT, Ken wrote: I just bought a few of these for myself and friends. None of them seem to be working. _ Problem is solved. These are for export and need to be "converted" to work with American electrons. * ;-) Ken (to reply via email) Just make sure you get a competent tech to perform the marriage ceremony correctly between the radio and amp, not one who impersonates a tech and claims you should probably replace c-1 in all three brand new amps. Better yet, find a tech who understands that "There are a lot of possible scenarios for what he is describing". -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#17
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Better yet, find a tech who understands that "There are a lot of possible
scenarios for what he is describing". Like a tech who believes three brand new amps have shorts in C1? You'd do a better job in enhancing your worth to this group if you'd post with a little more manners, use common sense, and also know when not to post? |
#18
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In , wrote:
Better yet, find a tech who understands that "There are a lot of possible scenarios for what he is describing". Like a tech who believes three brand new amps have shorts in C1? Did I say I believe they all had bad caps? No. I said it was -possible-, and it is. Better read more carefully or TwistyDave is going to start whining about your communication deficits. You'd do a better job in enhancing your worth to this group if you'd post with a little more manners, use common sense, and also know when not to post? But I -do- know when not to post -- I don't post when I don't know what I'm talking about, like issues regarding many popular radios such as Ranger, RCI, etc. I don't know anything about those except that most are easily modified to operate illegally. I couldn't tell you anything beyond that. What I -do- know is how to read a schematic, how to analyze a bad circuit, and how to locate possible causes of failure. And I -do- know how an RF amplifier works, as well as the operational characteristics of each and every component, active and passive. I -also- know that manufacturing processes can sometimes turn loose an entire lot of bad products, whether they are the final products or their components. And yes, I -also- know that sometimes there are unknown faults in equipment that can cause failures in other equipment. And I -=ALSO=- know that some people will keep replacing fuses as fast as they blow them without even thinking that the fault is not the fuse. In other words, it is not uncommon for someone to test two or more brand new products, discover that they are broken, and not realize that they were rendered non-functional as a result of their own bad test equipment or procedure. This happens quite frequently when the products have very static sensitive components (such as MOSFET's). You have therefore demonstrated that you have very little, if any, experience working with such devices, and should probably take your own advice (learn when not to post). -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#19
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#20
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![]() But I -do- know when not to post -- I don't post when I don't know what I'm talking about, like issues regarding many popular radios such as Ranger, RCI, etc. I don't know anything about those except that most are easily modified to operate illegally. I couldn't tell you anything beyond that. What I -do- know is how to read a schematic, how to analyze a bad circuit, and how to locate possible causes of failure. And I -do- know how an RF amplifier works, as well as the operational characteristics of each and every component, active and passive. I -also- know that manufacturing processes can sometimes turn loose an entire lot of bad products, whether they are the final products or their components. And yes, I -also- know that sometimes there are unknown faults in equipment that can cause failures in other equipment. And I -=ALSO=- know that some people will keep replacing fuses as fast as they blow them without even thinking that the fault is not the fuse. In other words, it is not uncommon for someone to test two or more brand new products, discover that they are broken, and not realize that they were rendered non-functional as a result of their own bad test equipment or procedure. This happens quite frequently when the products have very static sensitive components (such as MOSFET's). You have therefore demonstrated that you have very little, if any, experience working with such devices, and should probably take your own advice (learn when not to post). What you fail to realize is that you don't know that you have no common sense. |
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