Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-15 Thread Jeff Herr
Subject: Re: [Elecraft] KX3 I/Q to soundcard isolation I do connect KX3 IQ directly into my MacBookPro stereo in-line without any additional isolation too and it works great without any problem at all running under a parallels desktop virtual machine. Is there any special reason to isolate

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-15 Thread Giampiero Raschetti
.in the radio. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Giampiero Raschetti Sent: Sunday, October 14, 2012 22:02 To: Barry LaZar Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 I/Q to soundcard isolation

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-15 Thread N6363LLL
Hello All, There are big differences between interfacing a PC to the KX3 I/Q port compared to the needs of digital modes that use the headphone and mic audio connections. The I/Q port requires a flat bandpass to at least 48Khz. If you decide to use isolation transformers for the I/Q port, they

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-15 Thread Barry LaZar
To: Barry LaZar Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 I/Q to soundcard isolation I do connect KX3 IQ directly into my MacBookPro stereo in-line without any additional isolation too and it works great without any problem at all running under a parallels desktop virtual machine

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-15 Thread Jim Brown
On 10/15/2012 9:10 AM, N6363LLL wrote: There are big differences between interfacing a PC to the KX3 I/Q port compared to the needs of digital modes that use the headphone and mic audio connections. The I/Q port requires a flat bandpass to at least 48Khz. The noise some are experiencing

[Elecraft] KX3 I/Q to soundcard isolation

2012-10-14 Thread Jeff Herr
I need to provide electrical isolation between the I/Q output and my mic/line input. Since this is a 2 channel output I need 2 channel (stereo) isolation. Is there a commercial product anyone can point out to do this? If not then I must choose a couple of audio transformers and wire them up to

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-14 Thread Barry LaZar
Jeff, I don't know what problem you're having, but I run without any additional isolation with no problem. I go directly from my KX3 IQ out to my soundcard. Try it and see if you really need to go to the extra grief. 73, Barry K3NDM On 10/14/2012 4:43 PM, Jeff Herr wrote: I need to

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-14 Thread Matt Zilmer
If you're using a RigBlaster, you already have isolation. If not, you'll need to buy or wire up a galvanic isolator. 73, matt W6NIA KX3 #6 On Sun, 14 Oct 2012 13:43:40 -0700, you wrote: I need to provide electrical isolation between the I/Q output and my mic/line input. Since this is a 2

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-14 Thread Don Wilhelm
Jeff, I have used transformers salvaged from computer modem cards and I have used Xicon P/N 42TL016-R - Mouser PN 42TLC16-RC with success. Yes, there is some falloff in the response if you try to use 192 kHz display width, but then there is some falloff in the KX3 I/Q outputs for that width

Re: [Elecraft] KX3 I/Q to soundcard isolation

2012-10-14 Thread Giampiero Raschetti
I do connect KX3 IQ directly into my MacBookPro stereo in-line without any additional isolation too and it works great without any problem at all running under a parallels desktop virtual machine. Is there any special reason to isolate this line ? 73, iw2esl / Giampiero Sent from my iPad On