Jumping K2
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Hi all
My K2 # 4758 has gone strange. All is well if power is set to less than about 10 watts. But lately, if power is set to 12 w or more, it shuts down and emits a loud and nasty sounding "howl", which only lasts a moment. It promptly comes back on, but the frequency changes to a previously used frequency. This was not a one time happening, but can be duplicated. It seems to be so on all bands. The only options I have is the KAF-2, (which I love), and the noise blanker. Other than this problem, all is fine, and I am very pleased with my little sweetheart of a rig. I can understand its shutting down, but why is it changing frequency and barking at me?? In its earlier days when it shut down, it did so quietly and returned to the same frequency. Any ideas?? Tnx and 73, George, N4YM _______________________________________________ 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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I've not seen that symptom, but I'd be very suspicious of the resettable
fuse (F1) opening for some reason. Either it's gotten intermittent or you're drawing enough current to exceed its "trip point" at, I believe, 3 amps. The K2 is resetting to a previous frequency because you haven't done something to make it 'remember' the current settings yet. That'll happen any time you pull power. The howl... I'm not sure about but what's causing it might be what's causing the current overload on F1. First I'd check the current draw as you approach 12 watts. Ron AC7AC -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of [hidden email] Sent: Friday, November 25, 2005 6:21 PM To: [hidden email] Subject: [Elecraft] Jumping K2 Hi all My K2 # 4758 has gone strange. All is well if power is set to less than about 10 watts. But lately, if power is set to 12 w or more, it shuts down and emits a loud and nasty sounding "howl", which only lasts a moment. It promptly comes back on, but the frequency changes to a previously used frequency. This was not a one time happening, but can be duplicated. It seems to be so on all bands. The only options I have is the KAF-2, (which I love), and the noise blanker. Other than this problem, all is fine, and I am very pleased with my little sweetheart of a rig. I can understand its shutting down, but why is it changing frequency and barking at me?? In its earlier days when it shut down, it did so quietly and returned to the same frequency. Any ideas?? Tnx and 73, George, N4YM _______________________________________________ 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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I had a problem similar in the past.... when transmitting at 12W....
I heard a sound like this one (very scarry) and lost power after on that band.... The problem was a bad solder on the toroïd associated to the band. After, no problem at all. ============================================= /¯\/¯\/¯\/¯\/¯\/¯\ JEAN-FRANCOIS MENARD V A 2 V Y Z \_/\_/\_/\_/\_/\_/ FISTS #11896 Elecraft K2 #4130 Elecraft KX1 #999 http://homepage.mac.com/jfmenard ============================================= Le 05-11-25 à 23:15, Ron D'Eau Claire a écrit : > I've not seen that symptom, but I'd be very suspicious of the > resettable > fuse (F1) opening for some reason. Either it's gotten intermittent > or you're > drawing enough current to exceed its "trip point" at, I believe, 3 > amps. > > The K2 is resetting to a previous frequency because you haven't done > something to make it 'remember' the current settings yet. That'll > happen any > time you pull power. The howl... I'm not sure about but what's > causing it > might be what's causing the current overload on F1. First I'd check > the > current draw as you approach 12 watts. > > Ron AC7AC > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of > [hidden email] > Sent: Friday, November 25, 2005 6:21 PM > To: [hidden email] > Subject: [Elecraft] Jumping K2 > > > Hi all > > My K2 # 4758 has gone strange. All is well if power is set to less > than > about 10 watts. But lately, if power is set to 12 w or more, it > shuts down > and emits a loud and nasty sounding "howl", which only lasts a > moment. It > promptly comes back on, but the frequency changes to a previously used > frequency. This was not a one time happening, but can be > duplicated. It > seems to be so on all bands. The only options I have is the KAF-2, > (which I > love), and the noise blanker. Other than this problem, all is > fine, and I > am very pleased with my little sweetheart of a rig. I can > understand its > shutting down, but why is it changing frequency and barking at > me?? In its > earlier days when it shut down, it did so quietly and returned to > the same > frequency. > > Any ideas?? > > Tnx and 73, > George, N4YM > > _______________________________________________ > 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 _______________________________________________ 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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