Check to make sure the I/Q input cable (to line out) on the back of the SDR1K is seated all the way in. Having it pop out a little bit can cause the echo you are hearing.
-Tim --- Tim Ellison ( [EMAIL PROTECTED] ) Integrated Technical Services ( http://www.itsco.com ) -----Original Message----- From: John Hansen [mailto:[EMAIL PROTECTED] Sent: Thursday, July 13, 2006 11:07 AM To: John Basilotto Cc: [EMAIL PROTECTED]; Tim Ellison; FlexRadio@flex-radio.biz Subject: Re: [Flexradio] More on Audio Problem Thanks for the assistance, John. I'm getting really close to solving this problem. I rewired the cable and the hum is now gone. I'm not sure exactly what I did wrong the last time around, but I'm pretty sure that part is now good. The audio also sounds good both on the PowerSDR monitor and on my 2nd receiver. Except for one thing.... I can hear two voices in both the monitor and in the receiver (note I'm monitoring with headphones, so I'm reasonably certain that this is not an audio feedback problem). In addition to my normal voice I here a second voice that is very low pitched and sounds like it is on the wrong sideband. Also, strangely enough, it is delayed by a few milliseconds from my normal voice. I thought this might be an image rejection problem and I've been playing with the transmit image rejection controls but no change in the settings of those controls seems to have much of an effect on it. I can tell this audio is going to sound fabulous when I finally get this last issue resolved. I really appreciate your patience in working with me on it. John Hansen W2FS John Basilotto wrote: >Gentlemen, > >Everything suggested on the reflector with regard to John problem treats the >symptoms and not the root cause of the hum problem. The GL will work fine >plugged directly into the SDR mic jack but it must be wired properly-at both >ends. > >Heil 4- pin connector >Pin 1 shield--------------------------------to-----------------------Pin 7 >of 8 Pin connector >Pin 2 Mic audio---------------------------to-----------------------Pin 8 >Pin 3 PTT-----------------------------------to-----------------------Pin 6 >Pin 4 PTT-----------------------------------to-----------------------Pin 5 > >None of the wires should contact any of the other wires nor the 8-pin >connector case-- This is a very important! > >You will need to change the In 3 level to -10 in the D44 panel, up the mic >gain to about 65, and use the EQ [the GL has too much low end response and >will not sound good w/o EQ] use the SDR EQ cut the low by at least 6Db, >boost the mid by 3 DB and the High by 6 db. Fine-tune these settings on the >air. > >All the comments regarding Behringer mixers and W2IHY products are correct; >however, they should be used as "enhancers" and not a fix for the root >problem. > >Also, some Heil cables [other cables for that matter] have been known to >have hairline shorts. You might want to check for shorts between each of the >wires. > >73, and good luck. > > >John P. Basilotto >W5GI >Marketing and Product Manager >FlexRadio Systems >Office 512-250-8595 >Mobile 512-663-6727 > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] >Sent: Wednesday, July 12, 2006 10:09 PM >To: Tim Ellison; [EMAIL PROTECTED]; FlexRadio@flex-radio.biz >Subject: Re: [Flexradio] More on Audio Problem > > > >>can kill a bunch of birds with one stone by using Julius' EQplus (W2IHY) >>as a preamp, EQ, compressor/limiter, downward expander and an effects >>processor that you can use to feed three separate rigs with the same mic >>and key all the rigs with a single PTT switch. It is a little pricey, >> >> > >Tim, > >A little pricey? Yep... I would suggest that John runs the Gold line into >the Delta 44 direct (INS 2) via a Berhinger UB 502. The Berhinger Box will >provide the necessary low loise peramp, as well as some basic EQ tailoring >to flatten out the extreme base heavy nature of that particular mic. You can >get a UB 502 at your favorite Internet Vendor for about $35. The Berhinger >box has excellent isolation and is virtually hummm proof. Also it will give >you another 2 input source channels if you need them, and a headphone >output, etc etc.. The Berhinger box also has takeoffs and return for >external effect processor, but do hams need that? I thought reverb went out >with the 50s' > >IMHO the danger of the EQPlus (besides taking tomorrows breakfast from the >kids hi..hi...) is that if mis adjusted, as so may of them are, you will >introduce excessive sub-audio base rumble into your transmitted signal. This >looks like a DC signal on your transmitted SSB signal, if you look at it, >and it is very poor operating practice. W5GI, John, may wish to jump in >here, if he is reading this thread, and comment further. He is somewhat of >an expert on the Julius boxes and can confirm the issues related to their >constant mis-adjustment by most Hams that have them in the shack. >Personally, I think the are a little dangerous for most Hams that have >limited experience with pro-audio. > >Just my 2 cents, > >-Dan K6KDK > >I > > >_______________________________________________ >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
