Hi, I've been a happy camper with my K3-100F/P3 combo for many months now. I think I've got #5631, if memory serves. My purpose in writing is to determine if what I'm experiencing with noise and diminished volume while in Data-A mode on Line out, which goes to the sound card in my US Interface Navigator, seen on JT65-HF's waterfall, when my amplified speakers are connected to Speaker out, and not otherwise, is considered nominal. It doesn't have a serious impact on how I operate, since the hearing the received audio is not that important while using a.digital mode, e.g., JT65-HF, and I hear the signal from the K3's internal speaker, without the loss of volume and noise. Could it be as simple as an impedance mismatch from the speakers, and noise from the internal audio amplifier feeding back into the speaker out jack? The amplified speakers are nothing specially made for use with an HF transceiver. The only thing I've every done to the speakers, is to pass the audio in c able, which is just unshielded small gauge speaker wire, about ten times through an RFI toroid, which eliminated the distortion heard when I would tx into a relatively high VSWR. After a quick tune, the distortion went away, at any rate.
Could I use an audio isolation transformer, and/or optical isolation diodes to correct this behavior? I've heard that the line out jack already passes through an audio isolation transformer, but perhaps the speaker out jack is not so isolated? I routinely read this reflector in periodic digest mode, so excuse me if it takes sometime to reply to any queries or suggestions. I thank all the people who make this reflector such an interesting read everyday, and of course the good folks at Elecraft, who make such exceptional equipment available to hams at such attractive price points. My previous two rigs, not counting my HeathKit years, were a TS-450SAT and then an FT-897D. You can imagine what it was like for me to use the K3, in contrast to the equipment I had become accustomed to using. My only regret is that I didn't get all the mods installed by the factory with my initial purchase. I have several mods that I've since purchased, that I'm just too scared to install, and cause anything to go wrong. Somehow I am able to get by without a DVR and the 2meter option, and assorted filters. One day I'll install them when it feels right. Now I await the specifications of the new high powered tuner, although I very rarely have any need for even the 100 watts from the K3. And my current SGC SG-230 coupler does every thing except for 6 meters and ab ove; but then I have separate antennas for those bands, so it would be a nifty thing to have QRO capability, but then I've never had more than 100 watts, and somehow I make it through the day. The KX3, however, is a must have device. I try not to think about it too much, because I can't imagine how long it will take to get passed the initial backlog of orders and finally get one in my hands. It makes me tense to even think about the waiting period. On the other hand, maybe Elecraft will be ramped up at the outset and pleasantly surprise us all with a KX3 in time for Christmas. That would be sweet. -- 73, de Kyle AG2F [email protected] Living with just the right latitude at EL94fp31xr ______________________________________________________________ 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
