I have (and have always had) mine set to 20 also. Didn't help, in this instance.
I often turn the AGC off when running JT65A on 20m using the JT65-HF software, so that a strong signal somewhere in the 2 kHz passband doesn't trigger the AGC and wipe out a weak -25 dB signal I'm trying to decode. Bill W5WVO -------------------------------------------------- From: "JAMES ROGERS" <[email protected]> Sent: Wednesday, October 06, 2010 22:01 To: "Bill VanAlstyne W5WVO" <[email protected]> Cc: "[Elecraft]" <[email protected]> Subject: Re: [Elecraft] [K3] Speaker output amp kaput > Bill, > Look at your K3 manual page 53. and note the menu item AF LIM. After > seeing the posts on the amp failure, I immediate set this to limit the AF > output to safe levels as I frequently operate without the AGC being ON > (digital modes). I have mine set to 20, just arbitrary, half way between > 17 and 23. I also try to remember to reduce the RF gain to the S meter > indicating S9 before turning off the AGC. It is not a cure for the > "fragile" nature of the AF amp device but hopefully it will save me from > a similar fate. I am glad to know that if I do blow mine up, the > headphones will still work. > > 73s Jim, W4ATK > On Oct 6, 2010, at 1:19 PM, Bill VanAlstyne W5WVO wrote: > >> I recently fried (I believe) the speaker amplifier in my K3, apparently >> by >> just turning off the radio and turning it back on too quickly. Perhaps >> the >> fact that the AGC was disabled at the time might have had something to >> do >> with this, though that is just a guess. I accidentally turned off the K3 >> by >> pushing the POWER button by mistake, and, cursing my klutziness, >> immediately >> pushed the button again to turn it back on, as I was in the middle of a >> QSO. >> The radio came back on -- but sans speaker. It has been dead ever since. >> Configuration settings have been double-checked. It's not a catastrophe >> for >> me, because I normally use headphones anyway, but I'd like to get it >> fixed. >> >> Since I'm not reading every post on the list these days, I have probably >> missed something about this, because I dimly recall seeing some subject >> headings about the speaker amplifier. I didn't read these. Is this a >> user-replaceable part? If so, what is involved? >> >> And if this part is blowing up regularly, why is it so fragile? Is there >> something that can be done to better protect it? >> >> My K3 was recently (couple months ago) updated at the factory with all >> applicable mods. >> >> Bill W5WVO >> New Mexico >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
