I notice that John puts the choke at the computer, Flex puts the choke at the radio and Ahti puts chokes on both ends of the USB cable. I thought that the radio would be the thing sensitive to the RF so the Flex approach makes the most sense. But I'm not sure.
I have the same question concerning the audio cables going to the external sound "card" (Firebox etc.) I am inclined to do the belt and suspenders approach, chokes on both ends but wonder if anyone has run ferrite experiments. Incidentally, for those of you in the US who like the looks of Ahti's E cores in type N27 material, Type 77 is, apparently, similar to N27 ( http://users.catchnet.com.au/~rjandusimports/xref_mat.html ) and Amidon has a nice selection of E cores in type 77 http://www.amidoncorp.com/aai_cost_ecores.htm and Ham pricing http://www.amidoncorp.com/pricing/ I haven't received mine yet so no experiments have not been run. Jon, K6JEK On Oct 16, 2006, at 11:06 AM, <[EMAIL PROTECTED]> wrote: > I had very same problem and it appears that SWR is not the problem but > RF in the shack is. I added two (2) radio shack cable type clamp on > chokes to the USB cable about 6 months ago and problem resolved. Put > the Chokes right at the computer where the cable plugs in. Chokes a > little loose on usb cable so put a tie wrap behind them so they will > remain in place on the cable. > > John [EMAIL PROTECTED] > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > /pipermail/flexradio_flex-radio.biz/attachments/20061016/f75aca30/ > attachment.html > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
