Alan, The shielding was added to reduce radiation of the 500 MHz clock that was only a couple dB over the CE specification. It has virtually no effect on the HF performance of the radio on receive or transmit. Without the shielding, the radiated emissions are at least 6 dB better than FCC Class B requirements.
We will be happy to sell the shielding kit if you would like one. If it were my radio, I would not do it. Regards, Gerald Gerald Youngblood, K5SDR President FlexRadio Systems 13091 Pond Springs Rd. #250 Austin, TX 78729 Phone: 512-535-4713 www.flex-radio.com "Tune in excitement!" (TM) -----Original Message----- From: Alan NV8A [mailto:n...@charter.net] Sent: Monday, March 23, 2009 4:05 PM To: FlexRadio Reflector Cc: ger...@flex-radio.com Subject: Re: [Flexradio] Shielding improvements for Flex 5000A? Thanks for the reply, Gerald. But why would we not *all* want to improve the shielding by those extra few dB, even if the FCC doesn't tell us we have to? -- and assuming that the installation is not too difficult and that the cost is reasonable. Might help to make up for those transparent-plastic-cased PCs I see at my local independent computer store; how much shielding do you think they have? Enough to meet FCC Class anything? I doubt it. 73 Alan NV8A On 03/23/09 11:09 am Gerald Youngblood wrote: > Hi Alan, > > The shielding does not improve performance of RX2 itself. It does allow it > to pass the CE requirements for a transceiver. RX2 meets FCC radiated > emissions requirements without the shields. I turns out that CE > requirements for a transceiver are 8 dB more stringent than FCC Class B. > Note that CE radiated emissions requirements for a computer are the same as > FCC class B. > > Regards, > Gerald > > Gerald Youngblood, K5SDR > President > FlexRadio Systems > 13091 Pond Springs Rd. #250 > Austin, TX 78729 > Phone: 512-535-4713 > www.flex-radio.com > Out of curiosity I was reading the installation instructions for RX2, > which I am thinking that I might get sometime. If I understood > correctly, the installation kit includes (at least for European > customers, if not for all) additional metal "fingers" to improve the > shielding -- presumably to meet CE standards. > > Would not anything that improves the shielding be advantageous for all? > Are such "fingers" available for non-EU Flex-5000A rigs without RX2? Or > is there some approved widely available product we can use to improve > the shielding? _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
