weird power stuff
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While operating my K2, using the ATU with a balun
for my 300 ohm twinlead-fed loop, sometimes I've suddenly noticed that my power out, while transmitting, is showing only two bars, instead of the five or six I should be seeing. If I hit tune, I sometimes get "nothing" - no bars, and the display says lo power. After trying a couple of things - switching bands, or holding TUNE and DISPLAY together, I'll get it to tune up and act normally again. Sometimes after getting it going again, it shows all ten bars lit up at first, then reverts to the five or six. I did just change R98 on the RF board from 270 to 1K, which mostly resolved my too-high power out problem. Any ideas...? Thanks... LL/K3ESE 11+379+4442=KX1K1K2#4832 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In a message dated 5/2/2005 7:58:50 AM Pacific Daylight Time, [hidden email] writes: I did just change R98 on the RF board from 270 to 1K, which mostly resolved my too-high power out problem. Did you have this problem before you made the R98 change? If not, perhaps something you did made this happen. Geoff, K6TFZ _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Lloyd Lachow
--- [hidden email] wrote: > Did you have this problem before you made the R98 > change? Nope. > If not, perhaps something you did made this happen. ...but what? Any thoughts on what to check? LL __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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It may sound obvious, but is that resistor soldered in on both ends?
Any possible solder bridge at either end? Is the resistor intermittent? They do "break" - even modern film ones. Maybe *especially* film ones if they've been slightly damaged. I small crack in the outer cover can lead to a crack in the resistance element that pushes the value all over the place. If things are really strange, back up a step to where it worked last. If everything looks perfect, put the original resistor back in and see if the problem persists. 99.9% of the time a failure like that has to do with the thing you touched last, no matter how unlikely it seems. Ron AC7AC -----Original Message----- --- [hidden email] wrote: > Did you have this problem before you made the R98 > change? Nope. > If not, perhaps something you did made this happen. ...but what? Any thoughts on what to check? LL _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Ron,
True, true - in the event of problems shortly after making a change, retrace the steps related to that change very carefully, you will likely find the problem. 73, Don W3FPR > -----Original Message----- > > 99.9% of the time a failure like that has to do with the thing you touched > last, no matter how unlikely it seems. > > Ron AC7AC > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.1 - Release Date: 5/2/2005 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Why I build. Why I bother...
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In reply to this post by Ron D'Eau Claire-2
In the years before television, our family enjoyed something that was
attractive enough to pull me away from my Philmore crystal set with its finicky "cats whisker" that had to be set just right to hear the whisper of broadcast stations in my headphones. Our whole family would visit a large railway station a few miles away. My older brother, Mom, Dad and I spent many happy warm summer evenings there on the station platform watching the steam locomotives chugging back and forth along sidings assembling cars into trains. The ballet of moving rail cars was interrupted from time to time by a passenger train arriving at the platform, the car windows filled with the faces of travelers arriving from a distant city. To this kid, watching one of those huge steam locomotives hauling a long train clanking, chugging and blowing off steam as it stopped only a few feet away from me was almost as exhilarating as snagging clear-channel radio station KFI on my Philmore late at night. Almost. I guess that's why I ended up in electronics instead of working on the railroad. Technology has given me many great tools. There's a lot that I can see on TV that expands my world. There's even more on the World-Wide Web. Still, those appliances tend to isolate me from the real world. It's the difference between driving my MGA roadster and cruising along in an air-conditioned, sound-insulated luxury car. The modern car may offer greater convenience and comfort, but it does so at the cost of isolating me from the world outside. There's more than nostalgia or the necessity of saving money in tinkering with homebrew designs and assembling kits. It's a search for a balanced life in which we make time to experience things that interest us "up close and personal". It's coaxing an unlikely collection of parts into herding electrons around so we can pick up the movement of a telegraph key or the sounds of a voice from a distant place. It's a sense of "wonder" - like seeing that giant steam locomotive roll to a stop next to me all those years ago. How can a person be healthy without experiencing a sense of "wonder" every day? Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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