+++++++++++++++++++++ See also K2 Raspy Audio +++++++++++++++++++++ From: "f9oj" To: "David Walker" , Subject: Re: [Elecraft] Fuzzy Audio Date: Thu, 17 Apr 2003 10:57:03 +0200 Hi David Try to keep your compression as low as possible .Got the same problems as you, so I cured by : 1 /ajusting carefully the filter according to the number on the Xltl bag 2 / keeping compression down to 1 or 2, (and don't forget high compression , on any rig, isn't a solution ! ) 73 to you and all the Elecrafters Jacques ----- Original Message ----- From: "David Walker" To: Sent: Thursday, April 17, 2003 10:06 AM Subject: [Elecraft] Fuzzy Audio I was wondering if someone could give me some advise regarding KSB2 SSB poor quality transmit. I was talking to some bloke and the transmit took flight. I noticed the power meter waver when I wasn't talking and so I turned the power off. When I turned the radio people reported I was distorted and breaking up. I turned the radio off and on again.... and no solution. So I turned the radio off for 30 min's and tried again... no joy. People couldn't make out what i was saying. So I did a reset (holding 456 while turning the rig on.) I reset my filters, PLL linearisation, and Compression to 3 and set audio to 2. People now tell me my audio is fine. So... my question is... what would have gone wrong with the rig? I know it's a big question, but if anyone has had a similar problem I'd like to hear from you. This all sounds dodgy to me. Cheers all, Dave +++++++++++++++++++ From: "Bruce D. McLaughlin" To: "'David Walker'" , Subject: RE: [Elecraft] Fuzzy Audio Date: Thu, 17 Apr 2003 18:44:54 -0400 That sounds like a classic case of RF getting into the rig. If you have a dummy load, run the rig into it and listen on another receiver (if you have one). If the audio is clean, that would confirm RFI. There are a number of cures for RFI including careful grounding, rearranging the station setup, possible use of common mode or other forms of RFI chokes on the mike and transmission cable near the rig, etc. Some forms of antenna, such as end fed wires, are particularly susceptible to causing this sort of problem. You could also have a bad coax or coax connector. You may find that the problem does not happen on certain bands but is bad on others. I believe the Elecraft site has some suggestions as does the ARRL site and, I'm sure other sources. Good luck. Bruce - W8FU ++++++++++++++++++++ Reply-To: "Steve & Anne Ray" From: "Steve & Anne Ray" To: "Elecraft" , Date: Thu, 17 Apr 2003 20:19:35 -0400 Subject: [Elecraft] Fuzzy Audio. I had a similar problem on both transmit and receive. My old Heathkit digital clock was about 2 inches from the K2. Apparently the small transformer inside it was generating a magnetic field that was affecting the PLL. I could make the problem come and go simply by moving the clock from 2 inches to 6 inches from the K2. The clock only drew about 200 mA so I can imagine a regular 3 or 4 amp power supply could really affect the K2. 72, Steve Ray K4JPN ex K1VKW EM82ep Warner Robins GA Elecraft K2 1422 & KPA-100 Heath Fan HW-101, HW-8 ++++++++++++++++++++