All: A local friend just received his K3 Kit and took some photos of the assembly. I noticed the stiffeners right away and contacted Gary at Elecraft Support regarding aquiring two for my rig. I seem to have some annoying birdies and figured this shielding would help in at least reducing them.
Gary mentions in his email that they would do nothing for the birdies. He sent along a pictorial of a Italian gent who has rerouted his TMP cables in such a way to substantially reduce receiver birdies. This is on my "to do" list for the radio next time I take it offline. But, frankly, its much more fun to USE it than to WORK on it! (as an ex Triumph Spitfire owner, I've been there and have several hundred T-Shirts!) I had stopped considering the shields... But Wayne inferred here that they *DO* add shielding... And with the size of the birdies, some shielding is better than no shielding! (PS, I *HATE* the software birdie removal... It punches holes in the bands! I would rather put up with the birdies than mask them!) So, Elecrafters, do we need these "stiffener plates" for sheilding or for the removal of microphonics, or do they contribute to both? (BTW, I dont expect them for free, but I dont expect to pay $50 plus shipping for them, either!) I never use the rig with the internal speaker, as I have external speakers and 99% of the time I use a headset... But I might take it portable someday. Yes or no on this "modification"? Will it or will it not help the annoying birdies? I work hard to keep my rig at the latest "factory standard". Is this an "elective" or a "requirement"? -lu-W4LT- K3 #3192 ***** Message: 13 Date: Tue, 07 Sep 2010 08:53:20 -0700 From: Lyle Johnson <[email protected]> Subject: Re: [Elecraft] K3 Synthesizer Stiffener Plate Mod To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Loud internal speaker audio can cause small VCO sidebands. If present, it causes them on receive as well as transmit. 73, Lyle KK7P > As you say you only transmit on the "main VCO" so putting the shield on the > main vco would deal with speaker rumble issue so putting it on the subvco > maybe to improve shielding? ______________________________________________________________ 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
