Jeff, a couple questions. What version of the code are you running? Have you tried different versions to see if it affects the sound? If you back off the mike gain does it still sound grainy? Are you feeding the 5000 output into a dummy load for your recording? Have you tried it on a different band to see if it's RF? The third recording sounds slightly better then the first two when you back away from the mic. My 1KSDR had this problem until I added an EQplus in front of it. Working with Julius (W2IHY), I knew this was RF but I couldn't get rid of it. Maybe I didn't have the correct ferrite beads or bypassing. But adding the EQplus fixed it for me. I also use a PR40 and my shack is directly under my W5GI antenna. As a side note, if you are ever looking for software to measure THD, I use the following from www.ymec.com. They have a 30 trial that you could measure THD with. Since this is amateur equipment and not commercial grade I have not done this with my radio gear but I might be a fun test.
Jerry, WB0UZW -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Anderson Sent: Monday, July 07, 2008 10:43 AM To: Reflector Flex-Radio Subject: [Flexradio] TX Audio Quality Help, please! Some friends of mine and I often meet on 80 meters to operate in wideband audio mode (4k to 5k audio) on SSB. (Yes, I know that this isn't recommended operating practice,but we do it early in the evening before the band becomes occupied, so (hopefully) we aren't bothering anyone, and it sure does sound good.) Anyway, there have been a few complaints about my audio. I've been fighting this problem since January, and I've tried a number of things to improve the audio, but nothing has helped. Neither Gerald nor John at Flex have had any luck replicating my problem - it seems I'm the only one experiencing it. Anyway - I'm at wit's end trying to figure out what the heck is going on, and so I thought I'd try the massive brain power on the reflector to see if anyone here might have any ideas. I'm open to all suggestions! To get an idea of what I'm experiencing, you can go to my Blog. The URL is: http://k6jca.blogspot.com/ There are three different audio tests. If you could, please take a listen. Is there distortion, or am I imagining things? If you do hear distortion, any ideas of what to do? Suggestions, advice, and comments are welcome! And by the way, if any of you run a Heil PR-40 directly into your Flex, what settings for TX EQ do you use? Thanks! - Jeff, k6jca _______________________________________________ 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://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ 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://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
